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Journal articles on the topic 'Molecular self-assembly on silicon'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Lenfant, Stéphane, Christophe Krzeminski, Christophe Delerue, Guy Allan, and Dominique Vuillaume. "Molecular Rectifying Diodes from Self-Assembly on Silicon." Nano Letters 3, no. 6 (June 2003): 741–46. http://dx.doi.org/10.1021/nl034162f.

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2

Chang, Chia-Ching, Kien Wen Sun, Lou-Sing Kan, and Chieh-Hsiung Kuan. "Guided three-dimensional molecular self-assembly on silicon substrates." Applied Physics Letters 88, no. 26 (June 26, 2006): 263104. http://dx.doi.org/10.1063/1.2216881.

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3

Ma, Wen Shi, Fang Yang, Bang Jun Deng, Hai Yan Sun, and Xiao Dan Lin. "Studies on Self-Assembly of Methoxy Polyethylene Oxide Propyl Trimethoxysilane on Silicon Substrate." Advanced Materials Research 557-559 (July 2012): 1916–20. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1916.

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A novel hydrophilic and self-assemble functional methoxy polyethylene oxide propyl trimethoxysilane was synthesized by hydrosilylation reaction using methoxy polyethylene oxide monoallyl ether and trimethoxysilane. The self-assembled layer of methoxy polyethylene oxide propyl trimethoxysilane was prepared by immersing hydroxylate silicon substrate in silane solution. The structure, morphology and hydrophilicity of self-assembled layer were characterized by means of X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and water contact angle method. The results show that methoxy polyethylene oxide propyl trimethoxysilane can self-assemble on the surface of hydroxylate silicon substrate. At concentration of 0.80 g/100 mL and the self-assembling time of 60 minutes, the self-assembled layer of methoxy polyethylene oxide propyl trimethoxysilane of average molecular weight of 682 shows a brush-like structure with each brush column size of 10~15 nm in diameter and 5~8 nm in height. The correspondence of the columns height with the average length of the silane molecules suggests that the layer obtained is monolayer and the brush columns are constituted by extended PEO molecular chain units in the silane. The distribution of columns is uniform and the root-mean-square（RMS） roughness of self-assembled monolayer is 0.98 nm. Water contact angle of the monolayer is 7.4°. A super-hydrophilic surface is obtained.

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4

Abate, Antonio, Raphael Dehmel, Alessandro Sepe, Ngoc Linh Nguyen, Bart Roose, Nicola Marzari, Jun Ki Hong, James M. Hook, Ullrich Steiner, and Chiara Neto. "Halogen-bond driven self-assembly of perfluorocarbon monolayers on silicon nitride." Journal of Materials Chemistry A 7, no. 42 (2019): 24445–53. http://dx.doi.org/10.1039/c9ta04620h.

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5

Yam, Chi Ming, Adam Dickie, Aramice Malkhasian, Ashok K. Kakkar, and M. A. Whitehead. "Article." Canadian Journal of Chemistry 76, no. 11 (November 1, 1998): 1766–78. http://dx.doi.org/10.1139/v98-151.

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The hydrolysis of surface-bound basic tin-amide moieties with acidic protons of alkynyl chromophores leads to molecular self-assembly of a variety of rigid-rod alkynes on inorganic oxide surfaces such as glass, quartz, and single crystal silicon. Characterization of these newly developed thin films was achieved by contact-angle goniometry, FTIR-ATR, ellipsometry, and X-ray photoelectron spectroscopy, which indicate that these thin films are densely packed. Comparative molecular mechanics modeling studies on unbound and chemisorbed -Sn-Ctriple bondC-H monomer, dimer, trimer, and a 12 × 12 (144 molecule) model substrate, suggest that surface anchoring of Sn-alkynyl units is essential for highly ordered thin-film structures that can effect topochemical polymerization. Preliminary MO calculations on a 4 × 4 model show conjugated molecular orbitals through the system.Key words: molecular self-assembly, rigid-rod alkynes, acid-base hydrolysis, tin-alkynyl thin films, molecular mechanics modeling studies, topochemical polymerization, molecular orbitals.

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6

Chen, Song, Yong Run Yang, and Jin Dai Wang. "Effect of Silicon Sources on Self-Assembly in Acidic Environment and Impact on Morphology and Grain Size of Mesoporous Material." Solid State Phenomena 121-123 (March 2007): 465–68. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.465.

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Alkaline hydrothermal process with using cetyl-trimenthylammonium bromide as template is typical method to prepare MCM-41 mesoporous material. Synthesis in acid media was seldom researched deeply. With cheap inorganic water glass, effect of different silicon sources on self-assembly in acid media was investigated. Not like typical MCM-41 mesoporous materials, it is found that results of analysis are a little different and morphology of mesoporous materials synthesized in acid media does not rely on silicon sources, regardless of organic or inorganic silicon source. It is also noticed that nanometer granule of mesoporous material can be directly made by simply adjusting water dosage, which open up a new way for preparing nanometer material by self-assembly.

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7

Cisternas, Marcelo A., Francisca Palacios-Coddou, Sebastian Molina, Maria Jose Retamal, Nancy Gomez-Vierling, Nicolas Moraga, Hugo Zelada, Marco A. Soto-Arriaza, Tomas P. Corrales, and Ulrich G. Volkmann. "Dry Two-Step Self-Assembly of Stable Supported Lipid Bilayers on Silicon Substrates." International Journal of Molecular Sciences 21, no. 18 (September 17, 2020): 6819. http://dx.doi.org/10.3390/ijms21186819.

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Artificial membranes are models for biological systems and are important for applications. We introduce a dry two-step self-assembly method consisting of the high-vacuum evaporation of phospholipid molecules over silicon, followed by a subsequent annealing step in air. We evaporate dipalmitoylphosphatidylcholine (DPPC) molecules over bare silicon without the use of polymer cushions or solvents. High-resolution ellipsometry and AFM temperature-dependent measurements are performed in air to detect the characteristic phase transitions of DPPC bilayers. Complementary AFM force-spectroscopy breakthrough events are induced to detect single- and multi-bilayer formation. These combined experimental methods confirm the formation of stable non-hydrated supported lipid bilayers with phase transitions gel to ripple at 311.5 ± 0.9 K, ripple to liquid crystalline at 323.8 ± 2.5 K and liquid crystalline to fluid disordered at 330.4 ± 0.9 K, consistent with such structures reported in wet environments. We find that the AFM tip induces a restructuring or intercalation of the bilayer that is strongly related to the applied tip-force. These dry supported lipid bilayers show long-term stability. These findings are relevant for the development of functional biointerfaces, specifically for fabrication of biosensors and membrane protein platforms. The observed stability is relevant in the context of lifetimes of systems protected by bilayers in dry environments.

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8

Fairushin, I. I., A. Yu Shemakhin, and A. A. Khabir’yanova. "Molecular Dynamics Simulation of Copper Nanofilm Self-Assembly on Silicon Substrate under Gas-Discharge Plasma Conditions." High Energy Chemistry 55, no. 5 (September 2021): 399–401. http://dx.doi.org/10.1134/s0018143921050039.

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9

Wan, Congshan, Joe L. Gonzalez, Tianren Fan, Ali Adibi, Thomas K. Gaylord, and Muhannad S. Bakir. "Fiber-Interconnect Silicon Chiplet Technology for Self-Aligned Fiber-to-Chip Assembly." IEEE Photonics Technology Letters 31, no. 16 (August 15, 2019): 1311–14. http://dx.doi.org/10.1109/lpt.2019.2923206.

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10

Cushing, Kevin W., Timothy L. Vail, Jani C. Ingram, and Ingrid St Omer. "Micropatterned avidin arrays on silicon substrates via photolithography, self-assembly and bioconjugation." Biotechnology and Applied Biochemistry 43, no. 2 (March 1, 2006): 85. http://dx.doi.org/10.1042/ba20050085.

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11

Dayyoub, Eyas, and Udo Bakowsky. "Self-Assembled N-Succinyl-Chitosan Nanofibers for Reduced Protein Adhesion." Advances in Science and Technology 76 (October 2010): 36–41. http://dx.doi.org/10.4028/www.scientific.net/ast.76.36.

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Protein adhesion on biomaterial surfaces plays a major role in determining their biocompatibility and cell responses. The goal of this study was to produce chitosan-based coatings of implant material polyurethane (PUR) for reduced human serum albumin (HSA) adhesion. Succinic anhydride was employed for modifying chitosan and synthesis of N-succinyl-chitosan (NSCS) which was used as a matrix coating of PUR. NSCS showed self-assembly behaviour as nanofiber structures onto PUR surface. Atomic force microscopy (AFM) has emerged as useful tool for the molecular force measurements and therefore it has been chosen to investigate the adhesion properties of Human serum albumin (HSA) on the new matrix coatings and other three implant materials PUR, Silicon and Titanium. HSA molecules were covalently bound to the AFM tip by the use of cyanuric chloride as bivalent linker. Analyzing the force curves demonstrated the antiadhesive properties of the NSCS films in comparison with the uncoated PUR, Silicon and Titanium.

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12

Norton, Michael. "DESIGNED SELF-ORGANIZATION FOR MOLECULAR OPTOELECTRONIC SENSORS." International Journal of High Speed Electronics and Systems 17, no. 02 (June 2007): 311–26. http://dx.doi.org/10.1142/s0129156407004527.

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The convergence of terahertz spectroscopy and single molecule experimentation offers significant promise of enhancement in sensitivity and selectivity in molecular recognition, identification and quantitation germane to military and security applications. This paper provides a brief overview of the constraints set by single molecule recognition systems and reports the results of experiments which address fundamental barriers to the integration of large, patterned bio-compatible molecular opto-electronic systems with silicon based microelectronic systems. Central to this thrust is an approach involving sequential epitaxy on surface bound single stranded DNA one-dimensional substrates. The challenge of producing highly structured macromolecular substrates, which are necessary in order to implement molecular nanolithography, has been addressed experimentally by combining “designer” synthetic DNA with biosynthetically derived plasmid components. By design, these one dimensional templates are composed of domains which contain sites which are recognized, and therefore addressable by either complementary DNA sequences and/or selected enzymes. Such design is necessary in order to access the nominal 2 nm linewidth potential resolution of nanolithography on these one-dimensional substrates. The recognition and binding properties of DNA ensure that the lithographic process is intrinsically self-organizing, and therefore self-aligning, a necessity for assembly processes at the requisite resolution. Another requirement of this molecular epitaxy approach is that the substrate must be immobilized. The challenge of robust surface immobilization is being addressed via the production of the equivalent of molecular tube sockets. In this application, multi-valent core-shell fluorescent quantum dots provide a mechanism to prepare surface attachment sites with a pre-determined 1:1 attachment site : substrate (DNA) molecule ratio.

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13

Wahab, M. Abdul, and Chaobin He. "Self-Assembly Synthesis of Mesoscopically Ordered Biphenyl-Bridged Organosilica Films with Molecular Periodicity in the Pore Walls." Journal of Nanoscience and Nanotechnology 8, no. 12 (December 1, 2008): 6381–86. http://dx.doi.org/10.1166/jnn.2008.468.

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Mild acidic one-step self-assembled synthesis of periodic mesoporous biphenyl-bridged organosilica films having hydrogen-bonded large molecular-scale periodicity in the pore walls from 4,4-bis(triethoxysilyl)biphenyl (BTSBp) and cetyltrimethylammonium bromide (CTAB) is successfully described for the first time. High resolution X-ray diffraction analysis (HRXRD) along with transmission electron microscope observation (TEM) revealed the formation of periodic mesophase with molecular periodicity in the pore walls. The nitrogen adsorption–desorption isotherm shows a type-IV isotherm with a pore diameter of 3.1 nm and a Brunauer-Emmett-Teller surface area of 714 m2g−1. FT-IR and NMR spectroscopic data confirmed that biphenyl fragment is covalently linked with silicon atoms in final acidic-ethanol washed material. The obtained molecular-scale periodicity by structural model (1.389 nm) is consistent with experimental HRXRD value 1.40 nm. Nanoindentation hardness of biphenyl-bridged PMO films was found to be dependant on experimental conditions.

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14

Sahaf, H., L. Masson, C. Léandri, B. Aufray, G. Le Lay, and F. Ronci. "Formation of a one-dimensional grating at the molecular scale by self-assembly of straight silicon nanowires." Applied Physics Letters 90, no. 26 (June 25, 2007): 263110. http://dx.doi.org/10.1063/1.2752125.

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15

Batra, Inder P., Farid F. Abraham, and S. Ciraci. "Molecular-dynamics study of self-interstitials in silicon." Physical Review B 35, no. 18 (June 15, 1987): 9552–58. http://dx.doi.org/10.1103/physrevb.35.9552.

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16

Lopinski, G. P., D. D. M. Wayner, and R. A. Wolkow. "Self-directed growth of molecular nanostructures on silicon." Nature 406, no. 6791 (July 2000): 48–51. http://dx.doi.org/10.1038/35017519.

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17

Aswal, D. K., S. Lenfant, D. Guerin, J. V. Yakhmi, and D. Vuillaume. "Self assembled monolayers on silicon for molecular electronics." Analytica Chimica Acta 568, no. 1-2 (May 2006): 84–108. http://dx.doi.org/10.1016/j.aca.2005.10.027.

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18

Laurini, Erik, Domenico Marson, Maurizio Fermeglia, and Sabrina Pricl. "In silico design of self-assembly nanostructured polymer systems by multiscale molecular modeling." Science, Technology and Innovation 6, no. 3 (September 17, 2019): 1–10. http://dx.doi.org/10.5604/01.3001.0013.4795.

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The fast development of digitalization and computational science is opening new possibilities for a rapid design of new materials. Computational tools coupled with focused experiments can be successfully used for the design of new nanostructured materials in different sectors, particularly in the area of biomedical applications. This paper starts with a general introduction on the future of computational tools for the design of new materials and introduces the paradigm of multiscale molecular modeling. It then continues with the description of the multiscale (i.e., atomistic, mesoscale and finite element calculations) computational recipe for the prediction of novel materials and structures for biomedical applications. Finally, the comparison of in silico and experimental results on selected systems of interest in the area of life sciences is reported and discussed. The quality of the agreement obtained between virtual and real data for such complex systems indeed confirms the validity of computational tools for the design of nanostructured polymer systems for biomedical applications.

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19

Holt, Stephen A., Jeremy H. Lakey, Sofian M. Daud, and Neil Keegan. "Neutron Reflectometry of Membrane Protein Assemblies at the Solid/Liquid Interface." Australian Journal of Chemistry 58, no. 9 (2005): 674. http://dx.doi.org/10.1071/ch05112.

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Neutron reflectometry has been used to study the self-assembly of a membrane protein, OmpF, onto a gold-coated silicon substrate from solution. OmpF associates into trimers and has been modified so that each trimer binds to the gold substrate through cysteine residues. Quantitative analysis of the data revealed that 12% of the surface was covered by the oriented protein with 27600 water molecules surrounding each trimer.

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20

Abbott, Nicholas L., Amit Kumar, and George M. Whitesides. "Using Micromachining, Molecular Self-Assembly, and Wet Etching to Fabricate 0.1-1-.mu.m-scale structures of Gold and Silicon." Chemistry of Materials 6, no. 5 (May 1994): 596–602. http://dx.doi.org/10.1021/cm00041a007.

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21

Cao, Yong Zhi, Shen Dong, Ying Chun Liang, Tao Sun, and Yong Da Yan. "Block Copolymer Films Hierarchical Assembly in Confinement." Key Engineering Materials 364-366 (December 2007): 437–41. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.437.

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Ultrathin block copolymer films are promising candidates for bottom-up nanotemplates in hybrid organic-inorganic electronic, optical, and magnetic devices. Key to many future applications is the long range ordering and precise placement of the phase-separated nanoscale domains. In this paper, a combined top-down/bottom-up hierarchical approach is presented on how to fabricate massive arrays of aligned nanoscale domains by means of the self-assembly of asymmetric poly (styrene-block-ethylene/butylenes-block-styrene) (SEBS) tirblock copolymers in confinement. The periodic arrays of the poly domains were orientated via the introduction of AFM micromachining technique as a tool for locally controlling the self-assembly process of triblock copolymers by the topography of the silicon nitride substrate. Using the controlled movement of 2- dimensional precision stage and the micro pressure force between the tip and the surface by computer control system, an artificial topographic pattern on the substrate can be fabricated precisely. Coupled with solvent annealing technique to direct the assembly of block copolymer, this method provides new routes for fabricating ordered nanostructure. This graphoepitaxial methodology can be exploited in hybrid hard/soft condensed matter systems for a variety of applications. Moreover, Pairing top-down and bottom-up techniques is a promising, and perhaps necessary, bridge between the parallel self-assembly of molecules and the structural control of current technology.

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22

Kazlas, Peter T., Kristina M. Johnson, and Douglas J. McKnight. "Miniature liquid-crystal-on-silicon display assembly." Optics Letters 23, no. 12 (June 15, 1998): 972. http://dx.doi.org/10.1364/ol.23.000972.

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23

Zou, Xiao Ping, H. Abe, Toru Shimizu, A. Ando, H. Tokumoto, S. M. Zhu, and Hao Shen Zhou. "Synthesis of Locally-Ordered Carbon Nanotube Arrays from Patterned Catalyst by Self-Assembly Technique." Solid State Phenomena 121-123 (March 2007): 483–86. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.483.

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Site-selective growth of multi-walled carbon nanotubes (MWCNTs) from an iron oxide nanoparticle catalyst patterned by drying-mediated self-assembly technique is present. The ethanol solution of the iron nitrate was employed as catalyst precursor. The catalyst precursor was mounted on silicon wafer by dip-coating. After evaporation of solvent at room temperature, the catalyst pattern formed. The catalyst pattern was employed to synthesize carbon nanotube pattern by chemical vapor deposition of ethanol vapor after oxidation of iron nitrate. The patterned array of MWCNTs was obtained with a dot size of around 5 'm and the distance of about 25 'm. The present method offers a simple and cost-effective method to grow carbon nanotubes with self-assembled patterns.

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24

Walker, S., E. Naranjo, S. Chiruvolu, and J. Zasadzinski. "TEM investigations of self-assembly through physical synthesis." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 436–37. http://dx.doi.org/10.1017/s0424820100169912.

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A novel way of enlarging the realm of surfactant solution microstructure is the "physical synthesis" of new microstructures and surfactant-templated materials by mixing simple surfactants or surfactant and inorganic and ionic species. Mixing can often produce properties not possessed by any one species alone. As we have recently shown, mixtures of single-tailed cationic and anionic surfactants associate in solution to form a quasi-double-tailed catanionic surfactant that forms bilayers rather than the simple micelles each species would form on its own. Mixed surfactant systems apparently produce new microstructures by altering the intermolecular and interaggregate forces in ways impossible for single component systems. In addition to spontaneous vesicles, we have found other new microstructures including dilute lamellar and L3 phases depending on the details of the surfactant mixture. Surfactant interactions with ionic species also play an important role in the in synthesis of a new M41S family of mesoporous silicas, and are likely to be important in the templating of biominerals at interfaces. By understanding the molecular and chemical basis of these interactions, we can begin to tailor new microstructured and/or biomimetic materials by controlling surfactant aggregation and phase behavior through physical synthesis rather than through much more elaborate chemical synthesis.

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25

Forrest, Scott R., Bill B. Elmore, and James D. Palmer. "Activity and Lifetime of Urease Immobilized Using Layer-by-Layer Nano Self-Assembly on Silicon Microchannels." Applied Biochemistry and Biotechnology 121, no. 1-3 (2005): 0085–92. http://dx.doi.org/10.1385/abab:121:1-3:0085.

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26

Shaji, Ashin, Maja Micetic, Yuriy Halahovets, Peter Nadazdy, Igor Matko, Matej Jergel, Eva Majkova, and Peter Siffalovic. "Real-time tracking of the self-assembled growth of a 3D Ge quantum dot lattice in an alumina matrix." Journal of Applied Crystallography 53, no. 4 (July 24, 2020): 1029–38. http://dx.doi.org/10.1107/s1600576720007815.

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A laboratory in situ grazing-incidence small-angle X-ray scattering (GISAXS) tracking of the self-assembled growth of a regular 3D Ge quantum dot (QD) structure in an amorphous Al2O3 matrix during the ion beam sputter deposition of a periodic Ge/Al2O3 multilayer on silicon is reported. A 573 K substrate temperature proved to be necessary to achieve the self-assembly effect. Relying on a fast repeated acquisition of GISAXS patterns, the temporal evolution of the growing 3D Ge QD structure was analyzed bilayer by bilayer to determine its type, lateral and vertical correlation lengths, and inter-QD distance. The QD structure was found to have body-centered tetragonal lattice type with ABA stacking, with the lattice parameters refined by fitting the final GISAXS pattern relying on a paracrystal model. A single set of paracrystal parameters enables one to simulate the temporal evolution of the in situ GISAXS patterns throughout the deposition process, suggesting that the Ge QD self-assembly is driven from the very beginning solely by the growing surface morphology. Ex situ GISAXS and X-ray reflectivity measurements along with a cross-section high-resolution transmission electron microscopy analysis complete the study.

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27

Raghunathan, Varun, Hagen Renner, Robert R. Rice, and Bahram Jalali. "Self-imaging silicon Raman amplifier." Optics Express 15, no. 6 (2007): 3396. http://dx.doi.org/10.1364/oe.15.003396.

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28

Adsi, Hanaa, Shon A. Levkovich, Elvira Haimov, Topaz Kreiser, Massimiliano Meli, Hamutal Engel, Luba Simhaev, et al. "Chemical Chaperones Modulate the Formation of Metabolite Assemblies." International Journal of Molecular Sciences 22, no. 17 (August 25, 2021): 9172. http://dx.doi.org/10.3390/ijms22179172.

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The formation of amyloid-like structures by metabolites is associated with several inborn errors of metabolism (IEMs). These structures display most of the biological, chemical and physical properties of protein amyloids. However, the molecular interactions underlying the assembly remain elusive, and so far, no modulating therapeutic agents are available for clinical use. Chemical chaperones are known to inhibit protein and peptide amyloid formation and stabilize misfolded enzymes. Here, we provide an in-depth characterization of the inhibitory effect of osmolytes and hydrophobic chemical chaperones on metabolite assemblies, thus extending their functional repertoire. We applied a combined in vivo-in vitro-in silico approach and show their ability to inhibit metabolite amyloid-induced toxicity and reduce cellular amyloid content in yeast. We further used various biophysical techniques demonstrating direct inhibition of adenine self-assembly and alteration of fibril morphology by chemical chaperones. Using a scaffold-based approach, we analyzed the physiochemical properties of various dimethyl sulfoxide derivatives and their role in inhibiting metabolite self-assembly. Lastly, we employed whole-atom molecular dynamics simulations to elucidate the role of hydrogen bonds in osmolyte inhibition. Our results imply a dual mode of action of chemical chaperones as IEMs therapeutics, that could be implemented in the rational design of novel lead-like molecules.

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29

Dawi, E. A., and A. Abdelkader. "Assembly and Optical Properties of Metal Nanoparticles." Solid State Phenomena 294 (July 2019): 3–10. http://dx.doi.org/10.4028/www.scientific.net/ssp.294.3.

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In this paper, the deposition and optical properties of charge-stabilized gold nanoparticles on silicon oxide substrates is studied, which have been derivatised with (aminopropyl) triemethoxysilane. Monodispersed charged-stabilized colloidal gold nanoparticles with diameters between 20-150 nm were prepared and their self-assembly and optical properties on silica substrates is studied. Atomic force microscopy (AFM) is employed to investigate the nanoparticle monolayers ex situ. Analysis of AFM images provide evidence that the formation of the colloidal nanoparticle monolayers is governed by random sequential adsorption. The results indicate that the ionic strength of the suspension influences the spatial distribution of the nanoparticles. For all sizes of the Au nanoparticles tested, optical simulations of extinction coefficients made by finite-difference time domain (FDTD) indicate a resonance peak in the range of 510-600 nm wavelength of the visible range of the electromagnetic spectrum. The results indicate a simple and inexpensive approach of assembly of plasmonic nanostructures that can find applications in metamaterials and light waveguides.

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30

Guan, Hong Wei, Si Chen Liu, Yasuko Yanagida, and Takeshi Hatsuzawa. "Nanowire Fabrication by DNA Metallization and Positioning." Key Engineering Materials 523-524 (November 2012): 604–9. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.604.

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Deoxyribonucleic acid (DNA) has the appropriate molecular recognition property that makes it a suitable building block for the construction of nanoscale electronic devices. In particular, DNA employed as conducting wires is expected to be an alternative to optical lithography, which has resolution limits and requires high cost steppers. Nano-oxidation experiments were conducted on a silicon substrate by atomic force microscopy (AFM) to produce nanosized dots as anchors for DNA fixing. Short strand DNA molecules were then fixed on the anchors, which can recognize a specific complementary sequence. After the substrate was treated with a solution containing specific DNAs, which can hybridize with the short strand DNAs at the DNA sticky end, the anchors were connected to the DNAs by a self-assembly processes of DNA hybridization. Finally, silver was plated along the DNA molecules by a chemical treatment to introduce electrical conductivity. This method is expected to have potential for the integration of nanosized building blocks applicable to nanodevice construction.

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31

Ababou-Girard, S., S. Cordier, B. Fabre, Y. Molard, and C. Perrin. "Assembly of Hexamolybdenum Metallic Clusters on Silicon Surfaces." ChemPhysChem 8, no. 14 (October 8, 2007): 2086–90. http://dx.doi.org/10.1002/cphc.200700499.

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32

Shi, Chen, Chen Wei, Huang Han, Gao Xingyu, Qi Dongchen, Wang Yuzhan, and Andrew T. S. Wee. "Template-Directed Molecular Assembly on Silicon Carbide Nanomesh: Comparison Between CuPc and Pentacene." ACS Nano 4, no. 2 (January 5, 2010): 849–54. http://dx.doi.org/10.1021/nn901476m.

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33

Yakimchuk, Dzmitry V., Victoria D. Bundyukova, Jon Ustarroz, Herman Terryn, Kitty Baert, Artem L. Kozlovskiy, Maxim V. Zdorovets, et al. "Morphology and Microstructure Evolution of Gold Nanostructures in the Limited Volume Porous Matrices." Sensors 20, no. 16 (August 6, 2020): 4397. http://dx.doi.org/10.3390/s20164397.

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The modern development of nanotechnology requires the discovery of simple approaches that ensure the controlled formation of functional nanostructures with a predetermined morphology. One of the simplest approaches is the self-assembly of nanostructures. The widespread implementation of self-assembly is limited by the complexity of controlled processes in a large volume where, due to the temperature, ion concentration, and other thermodynamics factors, local changes in diffusion-limited processes may occur, leading to unexpected nanostructure growth. The easiest ways to control the diffusion-limited processes are spatial limitation and localized growth of nanostructures in a porous matrix. In this paper, we propose to apply the method of controlled self-assembly of gold nanostructures in a limited pore volume of a silicon oxide matrix with submicron pore sizes. A detailed study of achieved gold nanostructures’ morphology, microstructure, and surface composition at different formation stages is carried out to understand the peculiarities of realized nanostructures. Based on the obtained results, a mechanism for the growth of gold nanostructures in a limited volume, which can be used for the controlled formation of nanostructures with a predetermined geometry and composition, has been proposed. The results observed in the present study can be useful for the design of plasmonic-active surfaces for surface-enhanced Raman spectroscopy-based detection of ultra-low concentration of different chemical or biological analytes, where the size of the localized gold nanostructures is comparable with the spot area of the focused laser beam.

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34

Bormashenko, Edward, Yelena Bormashenko, and Mark Frenkel. "Formation of Hierarchical Porous Films with Breath-Figures Self-Assembly Performed on Oil-Lubricated Substrates." Materials 12, no. 18 (September 19, 2019): 3051. http://dx.doi.org/10.3390/ma12183051.

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Hierarchical honeycomb patterns were manufactured with breath-figures self-assembly by drop-casting on the silicone oil-lubricated glass substrates. Silicone oil promoted spreading of the polymer solution. The process was carried out with industrial grade polystyrene and polystyrene with molecular mass M w = 35 , 000 g m o l . Both polymers gave rise to patterns, built of micro and nano-scaled pores. The typical diameter of the nanopores was established as 125 nm. The mechanism of the formation of hierarchical patterns was suggested. Ordering of the pores was quantified with the Voronoi tessellations and calculation of the Voronoi entropy. The Voronoi entropy for the large scale pattern was S v o r = 0.6 − 0.9 , evidencing the ordering of pores. Measurement of the apparent contact angles evidenced the Cassie-Baxter wetting regime of the porous films.

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Ahmed, Tanzir, Sander van den Driesche, Martin Oellers, Roland Hemmler, Karsten Gall, Satya Prathyusha Bhamidimarri, Mathias Winterhalter, Richard Wagner, and Michael J. Vellekoop. "Fast Formation of Lipid Bilayer Membranes for Simultaneous Analysis of Molecular Transport Using Parylene Coated Chips." Proceedings 2, no. 13 (November 23, 2018): 920. http://dx.doi.org/10.3390/proceedings2130920.

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Artificial lipid bilayers are an essential tool to investigate channel forming proteins. A particular challenge is to study antibiotic uptake through bacterial porins requiring low volume and parallelization. Here, we present a lipid bilayer silicon chip having a Parylene-C coated silicon nitride membrane with different aperture sizes. The Parylene-C allows very fast lipid bilayer membrane fabrication, 30 to 130 s. The realization-success is very high and an average lifetime of at least 9 h was established. Furthermore, a 3D-printed holder is realized where parallel assembly of the chips, including fluid inlets for the pipetting robot, is demonstrated.

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36

Díaz-Valle, Armando, José Marcos Falcón-González, and Mauricio Carrillo-Tripp. "Hot Spots and Their Contribution to the Self-Assembly of the Viral Capsid: In Silico Prediction and Analysis." International Journal of Molecular Sciences 20, no. 23 (November 27, 2019): 5966. http://dx.doi.org/10.3390/ijms20235966.

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The viral capsid is a macromolecular complex formed by a defined number of self-assembled proteins, which, in many cases, are biopolymers with an identical amino acid sequence. Specific protein–protein interactions (PPI) drive the capsid self-assembly process, leading to several distinct protein interfaces. Following the PPI hot spot hypothesis, we present a conservation-based methodology to identify those interface residues hypothesized to be crucial elements on the self-assembly and thermodynamic stability of the capsid. We validate the predictions through a rigorous physical framework which integrates molecular dynamics simulations and free energy calculations by Umbrella sampling and the potential of mean force using an all-atom molecular representation of the capsid proteins of an icosahedral virus in an explicit solvent. Our results show that a single mutation in any of the structure-conserved hot spots significantly perturbs the quaternary protein–protein interaction, decreasing the absolute value of the binding free energy, without altering the protein’s secondary nor tertiary structure. Our conservation-based hot spot prediction methodology can lead to strategies to rationally modulate the capsid’s thermodynamic properties.

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Chai, Jinan, Dong Wang, Xiangning Fan, and Jillian M. Buriak. "Assembly of aligned linear metallic patterns on silicon." Nature Nanotechnology 2, no. 8 (August 2007): 500–506. http://dx.doi.org/10.1038/nnano.2007.227.

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38

Longo, Roberto C., Eric C. Mattson, Abraham Vega, Wilfredo Cabrera, Kyeongjae Cho, Yves Chabal, and Peter Thissen. "Atomic Mechanism of Arsenic Monolayer Doping on oxide-free Silicon(111)." MRS Advances 1, no. 33 (2016): 2345–53. http://dx.doi.org/10.1557/adv.2016.466.

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AbstractThe reaction pathway for shallow arsenic doping of silicon by methylarsenic acid molecules directly grafted on oxide-free, H-terminated Si(111) surfaces is unraveled combining Infrared absorption spectroscopy, X-ray Photoelectron Spectroscopy, Low Energy Ion Scattering and ab initio Molecular Dynamics simulations. The overall driving force is identified as a thermodynamic instability of As+5 in contact with silicon, which initiates a self-decomposition of chemisorbed methylarsenic molecules at ∼600 K. As the temperature is increased, the As-C bond breaks -- the weakest link of the adsorbed molecule -- with release of the organic ligand and a rearrangement from a monodentate to a bidentate bonding configuration. In this process, oxygen atoms evolve by partial desorption as H2O and partial incorporation into the surface Si atom backbonds. At ∼1050 K, diffusion of As into the sub-surface region of silicon is observed. There is no evidence for As desorption and no remaining C contamination.

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39

Dinda, Sanghamitra, Fung Ling Yap, Vignesh Suresh, Raju Kumar Gupta, Debajyoti Das, and Sivashankar Krishnamoorthy. "Quantitative Detection with Surface Enhanced Raman Scattering (SERS) Using Self-Assembled Gold Nanoparticle Cluster Arrays." Australian Journal of Chemistry 66, no. 9 (2013): 1034. http://dx.doi.org/10.1071/ch13222.

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We analysed sensitivity of high-density arrays of self-assembled gold nanoparticle clusters towards trace analyte detection and quantitative determination by surface enhanced Raman spectroscopy (SERS) employing an aromatic thiol as probe molecule. Periodic nanoscale arrays of gold nanoparticle clusters consisting of an average of 18 nanoparticles per cluster, and exhibiting mean inter-particle and inter-cluster separations below 10 nm were prepared using electrostatic self-assembly on block copolymer templates. The concentration dependent scaling of SERS intensities and the lowest detection limits on the cluster arrays on silicon substrate was probed using 1-naphthalenethiol (NT) as test molecule. The substrates show a detection limit of 10 nM along with high sensitivity to changes in NT concentration, which we attribute to high density of hot-spots uniformly organised across the surface. The capability for facile realisation of such arrays without a clean room environment or expensive tools makes the approach suitable for adoption for economic and high-performing SERS sensors.

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40

Satheesh, U., P. Prakash, and D. Devaprakasam. "Effects of perfluoroalkylsilane molecular assembly on flow induced voltage generated by doped silicon wafers." Journal of Applied Physics 121, no. 2 (January 14, 2017): 025501. http://dx.doi.org/10.1063/1.4974003.

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41

Caccamo, Sebastiano, and Rosaria Anna Puglisi. "Carbon-Free Solution-Based Doping for Silicon." Nanomaterials 11, no. 8 (August 5, 2021): 2006. http://dx.doi.org/10.3390/nano11082006.

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Molecular doping is a method to dope semiconductors based on the use of liquid solutions as precursors of the dopant. The molecules are deposited on the material, forming a self-ordered monolayer that conforms to the surfaces, whether they are planar or structured. So far, molecular doping has been used with precursors of organic molecules, which also release the carbon in the semiconductor. The carbon atoms, acting as traps for charge carriers, deteriorate the doping efficiency. For rapid and extensive industrial exploitation, the need for a method that removes carbon has therefore been raised. In this paper, we use phosphoric acid as a precursor of the dopant. It does not contain carbon and has a smaller steric footprint than the molecules used in the literature, thus allowing a much higher predetermined surface density. We demonstrate doses of electrical carriers as high as 3 × 1015 #/cm2, with peaks of 1 × 1020 #/cm3, and high repeatability of the process, indicating an outstanding yield compared to traditional MD methods.

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Емельянов, Е. А., А. Г. Настовьяк, М. О. Петрушков, М. Ю. Есин, Т. А. Гаврилова, М. А. Путято, Н. Л. Шварц, et al. "Маска на основе эпитаксиального слоя Si для самокаталитического роста нитевидных нанокристаллов на подложках GaAs (111)B и (100)." Письма в журнал технической физики 46, no. 4 (2020): 11. http://dx.doi.org/10.21883/pjtf.2020.04.49042.18065.

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GaAs nanowire (NW) self-catalyzed growth on GaAs (111) B and GaAs (100) substrates was carried out by molecular beam epitaxy. A mask for the self-catalyzed NW growth was created by oxidizing an epitaxial silicon layer grown on the GaAs surface by molecular beam epitaxy (MBE). Silicon oxidation was realized in an atmosphere of purified air under normal conditions without moving the structures out from the vacuum system volume of the molecular beam epitaxy chamber. The oxidation process of a silicon layer was studied using single-wave and spectral ellipsometry and the surface morphology of oxidized silicon was studied by atomic force microscopy. Substrates with NWs were studied by scanning electron microscopy. The NW density was demonstrated to be 2.6•107 cm-2 and 3•107 cm-2 for (111)B and (100), respectively.

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Mukherjee, Priyabrata, Melanie A. Whitehead, Robert A. Senter, Dongmei Fan, Jeffery L. Coffer, and Leigh T. Canham. "Biorelevant mesoporous silicon / polymer composites: directed assembly, disassembly, and controlled release." Biomedical Microdevices 8, no. 1 (March 2006): 9–15. http://dx.doi.org/10.1007/s10544-006-6377-7.

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44

Jia, Guobin, Jasper Westphalen, Jan Drexler, Jonathan Plentz, Jan Dellith, Andrea Dellith, Gudrun Andrä, and Fritz Falk. "Ordered silicon nanowire arrays prepared by an improved nanospheres self-assembly in combination with Ag-assisted wet chemical etching." Photonics and Nanostructures - Fundamentals and Applications 19 (April 2016): 64–70. http://dx.doi.org/10.1016/j.photonics.2016.01.003.

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45

Gao, Xuejiao, Ilia Kolevatov, Kaixiang Chen, Bin Guan, Abdelmadjid Mesli, Edouard Monakhov, and Yaping Dan. "Full Activation of Boron in Silicon Doped by Self-Assembled Molecular Monolayers." ACS Applied Electronic Materials 2, no. 1 (December 10, 2019): 268–74. http://dx.doi.org/10.1021/acsaelm.9b00748.

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46

Aleshkin, V. Ya, N. A. Bekin, N. G. Kalugin, Z. F. Krasil’nik, A. V. Novikov, V. V. Postnikov, and H. Seyringer. "Self-organization of germanium nanoislands obtained in silicon by molecular-beam epitaxy." Journal of Experimental and Theoretical Physics Letters 67, no. 1 (January 1998): 48–53. http://dx.doi.org/10.1134/1.567626.

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47

Huda, Miftakhul, You Yin, and Sumio Hosaka. "Self-Assembled Nanodot Fabrication by Using Diblock Copolymer." Key Engineering Materials 459 (December 2010): 120–23. http://dx.doi.org/10.4028/www.scientific.net/kem.459.120.

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In this study, we investigate self-assembled large-area nanodot fabrication on a silicon substrate using poly(styrene)-poly(dimethyl-siloxane) (PS-PDMS) for the application to quantum dot solar cell. By optimizing the PS-PDMS concentration by 2% and the volume of PS-PDMS solutions by 20 μL/cm2 dropped to silicon substrate, nanodots with a pitch size of 33 nm and a diameter of 23 nm are achieved with the molecular weight of 30,000-7,500. It is found that the dropped volume of PS-PDMS solution correlated to the thickness of spin-coated PS-PDMS layer has a great effect on the size and the pattern morphology.

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48

Liu, Sisi, He Sun, Xiaoning Huang, Shuangshuang Ruan, Haixu Lu, Zhicheng Tang, and Yunwen Wu. "Molecular Structure Characteristics and Wetting Behaviors of Alkyl Binary Doped Ionic Liquids’ Thin Lubricating Films on Silicon Surfaces: Molecular Dynamics Simulations." Mathematical Problems in Engineering 2019 (October 20, 2019): 1–13. http://dx.doi.org/10.1155/2019/1629391.

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The molecular structure characteristics and wetting behaviors of alkyl binary doped ionic liquids’ (ILs) thin lubricating film on silicon surfaces, which are composed of a (DA) self-assembled monolayer (SAM) and a binary doped ILs layer, are probed by molecular dynamics simulations. In the binary doped ILs layer, 1-carboxyethyl-3-methylimidazolium chloride ([CMIM]Cl) ILs were bonded to the terminal amino (NH2) groups of the DA SAM, and 1-dodecyl-3-methylimidazolium hexafluorophosphate ([DMIM]PF6) ILs were distributed around the [CMIM]Cl molecules by physical adsorption. Additionally, surface coverage and chain grafting positions of the bonded-phase [CMIM]Cl and the adsorption properties of mobile-phase [DMIM]PF6 were investigated. The simulation results revealed that the optimal surface coverage of [CMIM]Cl on the DA SAM was 50% with a lateral spacing of 2a and a longitudinal spacing of 22a, in which a is the space between the adjacent molecules. Meanwhile, the optimal molecular ratio of [CMIM]Cl to [DMIM]PF6 was 1 : 4, leading to the stablest structure of the lubricating film. Wetting behaviors of thin lubricating film on silicon surfaces showed good hydrophobicity, which is helpful for reducing friction and adhesion. It can be anticipated that the alkyl binary doped ILs’ thin lubricating film is suitable for antifriction and antiadhesion applications on silicon surfaces.

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Wang, Zhongyu, Ying Li, Hao Hu, and Xia Wang. "Molecular assembly and photoluminescence of lanthanide/silicon oxygen network/poly-vinylphenylboronic functionalized SBA-15 hybrids." Optical Materials 85 (November 2018): 211–19. http://dx.doi.org/10.1016/j.optmat.2018.08.040.

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Xiao, Zhanwen, Mingxiang Xu, Taizo Ohgi, Keisuke Sagisaka, and Daisuke Fujita. "Controlled assembly of DNA nanostructures on silanized silicon and mica surfaces for future molecular devices." Superlattices and Microstructures 32, no. 4-6 (October 2002): 215–20. http://dx.doi.org/10.1016/s0749-6036(03)00021-1.

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