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Journal articles on the topic 'Gold Nano Substrates'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Huang, Chu-Yu, and Chih-Hung Chien. "Facile Fabrication of Micro/Nano Hierarchical SERS Sensor via Anisotropic Etching and Electrochemical Treatment for Malachite Green Detection." Applied Sciences 9, no. 23 (2019): 5237. http://dx.doi.org/10.3390/app9235237.

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We propose a facile method to produce micro/nano hierarchical surface-enhanced Raman scattering (SERS) active substrates using simple steps and inexpensive costs. The proposed SERS substrate is a silicon pyramid array covered by a nanostructured gold film (AuNS @ SiPA). Through finite element method (FEM) simulation, we showed that many strong local electric field enhancements (hot spots) were formed between the nano-gap of gold nanostructures. In addition, the micron-scale pyramid structure not only increases the sensing surface area of the sensor, but also helps trap light. By combining thes

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2

Hennemann, Laura E., Andreas Kolloch, Andreas Kern, et al. "Assessing the plasmonics of gold nano-triangles with higher order laser modes." Beilstein Journal of Nanotechnology 3 (October 4, 2012): 674–83. http://dx.doi.org/10.3762/bjnano.3.77.

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Regular arrays of metallic nano-triangles – so called Fischer patterns – are fabricated by nano-sphere lithography. We studied such gold nano-triangle arrays on silicon or glass substrates. A series of different samples was investigated with a parabolic mirror based confocal microscope where the sample is scanned through the laser focus. By employing higher order laser modes (azimuthally and radially polarised laser beams), we can excite the Fischer patterns using either a pure in-plane (x,y) electric field or a strongly z-directional (optical axis of the optical microscope) electric field. We

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3

Kolská, Zdeňka, Václav Švorčík, and Jakub Siegel. "Size-dependent density of gold nano-clusters and nano-layers deposited on solid surface." Collection of Czechoslovak Chemical Communications 75, no. 5 (2010): 517–25. http://dx.doi.org/10.1135/cccc2009537.

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The gold density enters some indirect determination of gold properties as an input parameter. Reported gold density of 19 320 kg m–3 at standard conditions is correct for gold bulk or macro-sized specimens. For nano-sized specimens (nano-clusters, nano-layers), however, this standard density value need not be applicable. This work deals with gold density as a function of the nano-structure size. The calculated density was compared with experimental one performed for gold sputtered onto glass or poly(ethylene terephthalate) substrates. Calculated gold density was found to increase from 11 249 t

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4

Gaur, Shailendra Kumar, and R. S. Mishra. "Modeling and Microstructure Study of Thermally Evaporated Nano Film Thickness of Gold." International Journal of Advance Research and Innovation 4, no. 2 (2016): 149–58. http://dx.doi.org/10.51976/ijari.421622.

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The paper represents the modeling of nano scale gold film thickness deposited by thermal evaporation process. Gold is evaporated from a resistively heated boat at a temperature of 1900 K onto a surface held on a fixed surface. The incident molecular flux onto the silicon surface is 7.86x1019 (1/m2sec). The thickness varies between 78 nm and 80 nm across the sample after 60 s of deposition, with radial symmetry about the midpoint of the source. The film thickness, mass deposited on the substrate and mass transfer rate on silicon substrates with time dependent model using BDF solver is calculate

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5

Nan, Junyi, Min Li, Ling Zhang, Shuai Yuan, Boqu He, and Heping Zeng. "Terahertz and Photoelectron Emission from Nanoporous Gold Films on Semiconductors." Nanomaterials 9, no. 3 (2019): 419. http://dx.doi.org/10.3390/nano9030419.

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Efficient terahertz and photoelectron emission were observed from nano-porous gold (NPG) films deposited on an intrinsic gallium arsenide (GaAs) semiconductor substrate stimulated by femtosecond laser with pulse width of 60 fs. Time-domain THz emission and reflection spectroscopy confirmed that the free charges accelerated by irradiated femtosecond laser pulses transferred from the NPG films into the GaAs substrates. Accordingly, charges accumulation was reduced in the NPG films, resulting in a stronger emission of THz pulse than that from NPG films deposited on SiO2 substrate. Charges injecte

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6

YIN Yue, DOU Lin, SHEN Tian-Ci, LIU Jia-Tong, and GU Fu-Xing. "Laser trapping and manipulation of micro/nano-objects on polymer substrates." Acta Physica Sinica 74, no. 8 (2025): 0. https://doi.org/10.7498/aps.74.20241654.

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Polymer substrates overcome the limitations of rigid planar substrates in spatial deformation scenarios and can be combined with photolithography to fabricate complex, three-dimensional irregular polymer structures. Photothermal-shock tweezer is a laser trapping technique based on the photothermal shock effect. Photothermal-shock tweezer leverages pulsed laser induced transient photothermal shock to generate micro-newton-scale thermomechanical strain gradients force, enabling the capture and manipulation of micro/nano-objects at solid interfaces. Integrating this technique with polymer substra

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7

Jubair, Doaa S., Alwan M. Alwan, and Walid K. Hamoudi. "Sensing Performance of Mono and Bimetallic Nano Photonics Surface Enhanced Raman Scattering (SERS) Devices." Engineering and Technology Journal 39, no. 7 (2021): 1174–84. http://dx.doi.org/10.30684/etj.v39i7.1982.

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In this research, sensing performance of mono and bimetallic nanophotonics SERS sensors of gold-silver nano-columns for the detection of chlorpyrifos was investigated. For optimum substrates for Gold-silver/nano-column surface-enhanced, Raman scattering (SERS) was achieved with the silicon substrate. By combining the Ag SERS activity with the Au chemical stability and nano-columns Si large field enhancement, the Au-Ag/nano-columns Si substrate revealed perfect reproducibility, homogeneity, sensitivity in addition to chemical stability. The sensors were tested by Atomic force microscope (AFM),

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8

Wood, Jonathan, Dennis Palms, Ruvini Dabare, Krasimir Vasilev, and Richard Bright. "AFM for Nanomechanical Assessment of Polymer Overcoatings on Nanoparticle-Decorated Biomaterials." Nanomaterials 14, no. 18 (2024): 1475. http://dx.doi.org/10.3390/nano14181475.

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Nanoparticle adhesion to polymer and similar substrates may be prone to low nano-Newton forces, disrupting the surface bonds and patterning, potentially reducing the functionality of complex surface patterns. Testing this, a functionalised surface reported for biological and medical applications, consisting of a thin plasma-derived oxazoline-based film with 68 nm diameter covalently bound colloidal gold nanoparticles attached within an aqueous solution, underwent nanomechanical analysis. Atomic Force Microscopy nanomechanical analysis was used to quantify the limits of various adaptations to t

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9

Pienpinijtham, P., P. Sornprasit, K. Wongravee, C. Thammacharoen, and S. Ekgasit. "Gold microsheets having nano/microporous structures fabricated by ultrasonic-assisted cyclic galvanic replacement." RSC Advances 5, no. 95 (2015): 78315–23. http://dx.doi.org/10.1039/c5ra11193e.

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10

Zhang, Jingran, Tianqi Jia, Xiaoping Li, et al. "Fabrication of nano/microstructures for SERS substrates using an electrochemical method." Beilstein Journal of Nanotechnology 11 (October 16, 2020): 1568–76. http://dx.doi.org/10.3762/bjnano.11.139.

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Based on an electrochemical method, three-dimensional arrayed nanopore structures are machined onto a Mg surface. The structured Mg surface is coated with a thin gold (Au) film, which is used as a surface-enhanced Raman scattering (SERS) substrate. A rhodamine 6G (R6G) probe molecule is used as the detection agent for the SERS measurement. Different sizes of arrayed micro/nanostructures are fabricated by different treatment time using the electrochemical process. The topographies of these micro/nanostructures and the thickness of the Au film have an influence on the Raman intensity of the Mg s

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11

Fang, Cheng, Joseph George Shapter, Nicolas Hans Voelcker, and Amanda Vera Ellis. "Electrochemically prepared nanoporous gold as a SERS substrate with high enhancement." RSC Adv. 4, no. 37 (2014): 19502–6. http://dx.doi.org/10.1039/c4ra01909a.

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Gold films were electrochemically etched into nanoporous substrates with tuneable pore sizes down to approximately 2 nm. The SERS enhancement as a result of changes in valley and ligament widths of the nanoporous gold was investigated. Compared to the conventional de-alloyed nano-gold, the etched gold showed a lower limit of detection (2 × 10<sup>−9</sup> M vs. 1 × 10<sup>−7</sup> M Rhodamine 6G).

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12

Abbas, Yawar, Ayman Rezk, Irfan Saadat, Ammar Nayfeh, and Moh'd Rezeq. "Time dependence of electrical characteristics during the charge decay from a single gold nanoparticle on silicon." RSC Advances 10, no. 68 (2020): 41741–46. http://dx.doi.org/10.1039/d0ra08135c.

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In this work, we investigate the time dependence of trapped charge in isolated gold nanoparticles (Au-NPS) dispersed on n-Si substrates, based on the electrical characteristics of nano metal–semiconductor junctions.

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13

Cao, Zhong, Yong Le Liu, Su Xi Wu, et al. "Fabrication of Gold Cap-Shaped Nano-Particle Films and Sensing Device for Bioanalytical Application." Advanced Materials Research 97-101 (March 2010): 2188–91. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.2188.

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The nano biosensors based on gold cap-shaped nano-particles like polystyrene and silica nanospheres have been successfully prepared on the substrates of disposable plate (96 wells) and miniplate (72 wells). The sensing film of carboxymethyl dextran layer was modified on the gold surface of the cap-shaped nano-particles. The corresponding micro-device with four channel of optical sensing system has been well constructed and applied to detection of anti-avidin D protein and biotinylated DNA molecules. The DNA hybridization reaction has also been real-time and parallel monitored in four channels,

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14

Huang, Shi Bin, Xu Hong Guo, Li Li, Hong Ru Xu, and Ya Ming Dong. "Self-Assembly of Nano-Sized Spherical Polyelectrolyte Brushes on Different Substrates as Observed by AFM." Applied Mechanics and Materials 110-116 (October 2011): 3762–69. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.3762.

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Nano-sized spherical poly (acrylic acid) (PAA) brushes (SPB) were prepared on the surface of colloidal polystyrene (PS) particles by photo-emulsion polymerization. Atomic force microscopy (AFM) was employed to observe the assembly of SPB on substrates of silicon, gold and mica with various surface properties and to determine the morphological information including particle size, shape and core-shell structure of SPB. We found that the surface polarity, electrostatic interactions between SPB and substrate surface and among SPB and capillary forces during sample drying affect the SPB assembly on

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15

Kuncicky, Daniel M., Steven D. Christesen, and Orlin D. Velev. "Role of the Micro- and Nanostructure in the Performance of Surface-Enhanced Raman Scattering Substrates Assembled from Gold Nanoparticles." Applied Spectroscopy 59, no. 4 (2005): 401–9. http://dx.doi.org/10.1366/0003702053641559.

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Highly active and stable substrates for surface-enhanced Raman scattering (SERS) can be fabricated by using colloidal crystals to template gold nanoparticles into structured porous films. The structure-dependent performance of these SERS substrates was systematically characterized with cyanide in continuous flow microfluidic chambers. A matrix of experiments was designed to isolate the SERS contributions arising from nano- and microscale porosity, long-range ordering of the micropores, and the thickness of the nanoparticle layer. The SERS results were compared to the substrate structure observ

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16

Yang, Peidi, Baolong Zhang, Jinglong Ma, Yutong Li, Jungang Miao, and Xiaojun Wu. "Nonlinear terahertz effects of gold nanofilms." Terahertz Science and Technology 14, no. 1 (2021): 20–30. http://dx.doi.org/10.1051/tst/2021141020.

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Nonlinear interaction between strong-field terahertz electromagnetic waves and matters will become one of the next hot research frontiers in nonlinear optics. However, the lack of strong terahertz radiation sources and appropriate nonlinear terahertz materials have impeded its progress. Here we systematically have investigated the strong-field terahertz nonlinear effects of gold (Au) nanofilms on different substrates, including SiO2, high-resistivity Si and SiO2-high-resistivity Si hybrid substrates. The strong-field terahertz waves are emitted from lithium niobate crystals via tilted pulse fr

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17

Jabeen, M., M. W. Asharaf, S. Tayyaba, N. Ali, R. V. Kumar, and H. Alrobei. "Growth of zinc oxide nanowires by equimolar solution technique on conducting substrates used for optical applications." Digest Journal of Nanomaterials and Biostructures 16, no. 4 (2021): 1253–61. http://dx.doi.org/10.15251/djnb.2021.164.1253.

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Zinc oxide nanorods were successfully fabricated on various substrates coated with metal oxide such as platinum and gold by aqueous solution method. The current research shows the influence of conducting substrates on surface morphology and its use for optical properties zinc oxide nanostructures. Samples were analyzed by energy dispersive (EDX), X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM) and UV-Visible spectroscopy (UV-vis). The fabricated zinc oxide nanorods exhibit excellent crystalline quality and hexagonal wurzite structure. The Zinc oxide nano-walls and

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18

Yukhymchuk, V. O., V. M. Rubish, V. M. Dzhagan, et al. "Surface-enhanced Raman scattering of As2S3 and Se thin films formed on Au nano-structures." Semiconductor Physics, Quantum Electronics and Optoelectronics 26, no. 1 (2023): 049–58. http://dx.doi.org/10.15407/spqeo26.01.049.

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The effect of plasmonic nanostructures (NSs) on the Raman spectra and underlying structural changes in thin chalcogenide films is investigated. Several tens of nanometers thick As 2 S 3 and Se films were deposited by thermal sputtering on glass and surface-enhanced Raman spectroscopy (SERS) substrates based on gold nanostructures for comparison. The films on glass were practically not detectable by the Raman spectroscopy. Using gold NSs as the substrates enabled reliable registration of the Raman spectra of both the As 2 S 3 and Se films. The registered Raman spectra contained all the features

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19

Taghavi Moghaddam, Seyed Enayatollah, and Farzin Emami. "Surface-Enhanced Raman Scattering Based on Au-DNA-Ag Plasmonic Nanoparticles." Journal of Nanoelectronics and Optoelectronics 15, no. 11 (2020): 1307–11. http://dx.doi.org/10.1166/jno.2020.2855.

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The dependence of the Surface-Enhanced Raman Scattering (SERS) by gold and silver nanoparticles on their shape is examined using the organic dye, as a probe molecule. SERS has been explored extensively for applications in sensing and imaging, but the design and optimization of efficient substrates are still challenging. In order to understand and optimize the SERS process in nanoparticles, gold and silver Nanospheres and their composition as gold-DNA-silver nanoparticle were synthesized and characterized according to their average size, zeta potential and UV/visible absorption. In fact, in thi

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20

Verma, Ashwani Kumar, Rupali Das, and R. K. Soni. "Laser Processing of Low Optical Reflection Micro/Nano-patterned Si Substrates for SERS." MRS Advances 2, no. 44 (2017): 2379–84. http://dx.doi.org/10.1557/adv.2017.369.

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ABSTRACTLight collection efficiency and specific molecular detection are crucial factors for the performance of bio-chemical molecule sensors. In this paper, the low optical-reflection silicon (Si) substrates which combine reduced optical reflectivity by light trapping effect and high Raman enhancement ability of gold nanoparticles (Au-NPs) coated textured Si substrates are investigated for surface-enhanced Raman scattering (SERS). A fast, single-step and highly controllable nanosecond (ns) laser processing technique is employed to fabricate textured Si substrates under ambient conditions. Par

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21

Cesaria, Maura, Adriano Colombelli, Daniela Lospinoso, et al. "Long- and Short-Range Ordered Gold Nanoholes as Large-Area Optical Transducers in Sensing Applications." Chemosensors 7, no. 1 (2019): 13. http://dx.doi.org/10.3390/chemosensors7010013.

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Unconventional lithography (such as nanosphere lithography (NSL) and colloidal lithography (CL)) is an attractive alternative to sequential and very expensive conventional lithography for the low-cost fabrication of large-area nano-optical devices. Among these, nanohole (NH) arrays are widely studied in nanoplasmonics as transducers for sensing applications. In this work, both NSL and CL are implemented to fabricate two-dimensional distributions of gold NHs. In the case of NSL, highly ordered arrays of gold NHs distributed in a hexagonal lattice onto glass substrates were fabricated by a simpl

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22

Takeda, Naoki, and Satoshi Kurumi. "Growth of Highly Oriented Crystalline Silver Nanostructures on MgO (001) Substrates By Pulsed Laser Ablation and Application to SERS Substrates." ECS Meeting Abstracts MA2024-02, no. 22 (2024): 1879. https://doi.org/10.1149/ma2024-02221879mtgabs.

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Surface enhanced Raman scattering (SERS) substrates are expected to be applied to some functional devices such as high-sensitive biosensors and photocatalysts.[1-2] In order to produce metal nanostructures, electron beam lithography and chemical method have mainly been used so far. Although these methods are effective for nano-level microfabrication, there are problems such as the need for multiple processes, unsuitability for large-area processing, poor mass production, and susceptibility to surface oxidation. For clearing these problems, we have fabricated SERS substrates by depositing metal

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23

Olliges, Sven, Patric A. Gruber, Steffen Orso, et al. "In situ observation of cracks in gold nano-interconnects on flexible substrates." Scripta Materialia 58, no. 3 (2008): 175–78. http://dx.doi.org/10.1016/j.scriptamat.2007.09.037.

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24

Otsuka, H., T. Satomi, Koji Ueno, and Tetsuya Tateishi. "Nano-Fabricated Aligned Spheroid for Cartilage Tissue Engineering." Advances in Science and Technology 53 (October 2006): 67–69. http://dx.doi.org/10.4028/www.scientific.net/ast.53.67.

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Micropatterned PEGylated substrates with two-dimensional arrays of plasma-etched circular domains (diameter:100 micro-m) were prepared by coating of mercapto-functionalized poly(ethylene glycol) (PEG) on Au surface, followed by plasma-etching through a metal mask pattern with circular holes. The PEGylated region on the patterned substrate works to repel proteins, consequently, inhibits cell adhesion. Then the micro-patterning of bovine articular chondrocytes or rat primary hepatocytes hetero-spheroids underlaid with human umbilical endothelial cells (HUVEC) was achieved on the plasma-etched ci

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25

Abshari, Fatemeh, Moritz Paulsen, Salih Veziroglu, Alexander Vahl, and Martina Gerken. "ITO-TiO₂ Heterojunctions on Glass Substrates for Photocatalytic Gold Growth Along Pattern Edges." Catalysts 14, no. 12 (2024): 940. https://doi.org/10.3390/catal14120940.

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This study investigates the effects of varying indium tin oxide (ITO) layer thicknesses and the patterning of the ITO layer on the growth of metallic gold (Au) nano- and microstructures on titanium dioxide (TiO₂) templates. The ITO-TiO₂ heterojunction serves to collect photogenerated electrons in the ITO sublayer, facilitating their transport to the pattern edges and concentrating photocatalytic activity at these edges. Six template types were fabricated on glass substrates, with systematic variations in ITO thickness (0, 3, 6, 10, and 30 nm) and different ITO patterning methods (either contin

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26

Zhou, Lan, Simone Poggesi, Giuliocesare Casari Bariani, et al. "Robust SERS Platforms Based on Annealed Gold Nanostructures Formed on Ultrafine Glass Substrates for Various (Bio)Applications." Biosensors 9, no. 2 (2019): 53. http://dx.doi.org/10.3390/bios9020053.

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In this study, stable gold nanoparticles (AuNPs) are fabricated for the first time on commercial ultrafine glass coverslips coated with gold thin layers (2 nm, 4 nm, 6 nm, and 8 nm) at 25 °C and annealed at high temperatures (350 °C, 450 °C, and 550 °C) on a hot plate for different periods of time. Such gold nanostructured coverslips were systematically tested via surface enhanced Raman spectroscopy (SERS) to identify their spectral performances in the presence of different concentrations of a model molecule, namely 1,2-bis-(4-pyridyl)-ethene (BPE). By using these SERS platforms, it is possibl

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Li, X., J. Huang, and M. J. Edirisinghe. "Novel patterning of nano-bioceramics: template-assisted electrohydrodynamic atomization spraying." Journal of The Royal Society Interface 5, no. 19 (2007): 253–57. http://dx.doi.org/10.1098/rsif.2007.1162.

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The ability to create patterns of bioactive nanomaterials particularly on metallic and other types of implant surfaces is a crucial feature in influencing cell response, adhesion and growth. In this report, we uncover and elucidate a novel method that allows the easy deposition of a wide variety of predetermined topographical geometries of nanoparticles of a bioactive material on both metallic and non-metallic surfaces. Using different mesh sizes and geometries of a gold template, hydroxyapatite nanoparticles suspended in ethanol have been electrohydrodynamically sprayed on titanium and glass

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28

GUPTA, ASHISH, SAUMEN MANDAL, MONICA KATIYAR, and YASHOWANTA N. MOHAPATRA. "LOW TEMPERATURE SOLUTION PROCESS FOR FABRICATION OF ELECTRODES ON FLEXIBLE SUBSTRATE USING GOLD NANOPARTICLES." International Journal of Nanoscience 10, no. 04n05 (2011): 659–63. http://dx.doi.org/10.1142/s0219581x11009192.

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Inkjet printing technology has emerged as major contender for large area electronics. The major challenge for this technology is the development of suitable conductive ink to obtain high quality patterns with desired electrical conductivity comparable to metals. The conductive ink should have good film formability on the flexible substrate as well as lower annealing temperature compatible with plastic substrates. Gold nano particle (AuNP) is the material of choice due to its very low sintering temperature in addition to excellent electrical property and resistance to corrosion. We have synthes

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Coluccio, Maria Laura, Valentina Onesto, Giovanni Marinaro, et al. "Cell Theranostics on Mesoporous Silicon Substrates." Pharmaceutics 12, no. 5 (2020): 481. http://dx.doi.org/10.3390/pharmaceutics12050481.

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The adhesion, proliferation, and migration of cells over nanomaterials is regulated by a cascade of biochemical signals that originate at the interface of a cell with a substrate and propagate through the cytoplasm to the nucleus. The topography of the substrate plays a major role in this process. Cell adhesion molecules (CAMs) have a characteristic size of some nanometers and a range of action of some tens of nanometers. Controlling details of a surface at the nanoscale—the same dimensional over which CAMs operate—offers ways to govern the behavior of cells and create organoids or tissues wit

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30

Gupta, Ashish, Saumen Mandal, Monica Katiyar, and Yashowanta N. Mohapatra. "Film processing characteristics of nano gold suitable for conductive application on flexible substrates." Thin Solid Films 520, no. 17 (2012): 5664–70. http://dx.doi.org/10.1016/j.tsf.2012.04.017.

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Yuan, Zong Heng, Dong Dong Zhu, and Hong Ru Wang. "Comparison of Resonance Characteristics for Two Metal Nano-Optical Antennas." Applied Mechanics and Materials 138-139 (November 2011): 894–99. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.894.

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In this paper dipole type optical antenna and V type optical antenna are designed using gold and glass substrates, we compared their resonance properties by finite-difference time-domain (FDTD) method, calculated and analyzed their distribution and field enhancement effects contrastively. The results showed that in the same projected length, the resonant frequency of dipole type optical antenna was higher than the V type optical antenna, while the resonance enhancement factor was lower than the V type optical antenna. These have certain reference significance for researching characteristics of

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HAJIVALIEI, MAHDI, and SAEED NAZARI. "THE EVOLUTION OF FABRICATED GOLD THIN FILMS TO NANO–MICRO PARTICLES UNDER THERMAL ANNEALING PROCESS." Surface Review and Letters 23, no. 06 (2016): 1650052. http://dx.doi.org/10.1142/s0218625x16500529.

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Gold (Au) thin films with thickness of 35[Formula: see text]nm were prepared by electron beam deposition onto flat glass substrates under high vacuum [Formula: see text]Pa) condition and they were annealed in the range of 573–873 K for 1 and 2[Formula: see text]h in atmospheric pressure. The influence of the annealing temperature on the evolution of Au thin film to nano–micro particles was studied. Moreover, the basic properties of the films, namely morphological, structural and optical were investigated. The X-ray diffraction (XRD) analysis revealed that the Au thin films were cubic structure

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Fotticchia, Andrea, David Musson, Cristina Lenardi, Emrah Demirci, and Yang Liu. "Anisotropic cytocompatible electrospun scaffold for tendon tissue engineering elicits limited inflammatory response in vitro." Journal of Biomaterials Applications 33, no. 1 (2018): 127–39. http://dx.doi.org/10.1177/0885328218779846.

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Tendon tears are a relevant concern for today’s national health systems because of their social impact and high recurrence rate. The current gold standard for fixing tendon tears is surgical repair; however, this strategy is not able to fully re-establish tendon integrity and functionality. Tissue engineering approaches aim at promoting tissue regeneration by delivering the opportune signals to the injured site combining biomaterials, cells and biochemical cues. Electrospinning is currently one of the most versatile polymer processing techniques that allows manufacturing of nano- and micro-fib

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Lee, Soyeon, and Jaebum Choo. "Ultrasensitive Chemical Analysis on Gold Nano Popcorn Substrate Using Digital Surface-Enhanced Raman Scattering." Molecules 30, no. 6 (2025): 1371. https://doi.org/10.3390/molecules30061371.

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This study presents a digital surface-enhanced Raman scattering (SERS) method to enhance the sensitivity of SERS detection for low-concentration analytes. Conventional SERS analysis using average Raman intensity faces limitations in distinguishing low concentrations due to the substrate’s sparse distribution of target molecules. To overcome this challenge, we used a binary code-based data analysis approach. Gold nano popcorn substrates were utilized for high-sensitivity detection, with malachite green isothiocyanate (MGITC) as the target molecule. Raman mapping data were analyzed using both th

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Zhang, Yunfei, Danqi Li, Xingyu Zhou, Xihui Gao, Shengyuan Zhao, and Cong Li. "Enhancing sensitivity of SERRS nanoprobes by modifying heptamethine cyanine-based reporter molecules." Journal of Innovative Optical Health Sciences 09, no. 04 (2016): 1642005. http://dx.doi.org/10.1142/s1793545816420050.

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Surface enhanced resonance Raman scattering (SERRS) is a physical phenomenon that occurs when the energy of incident light is close to that of electronic excitation of reporter molecules (RMs) attached on substrates. SERRS has showed great promise in healthcare applications such as tumor diagnosis, image-guided tumor surgery and real-time evaluation of therapeutic response due to its ultra-sensitivity, manipulating convenience and easy accessibility. As the most widely used organic near-infrared (NIR) fluorophore, heptamethine cyanines possess the electronic excitation energy that is close to

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Shim, Byung Young, Eun A. Ko, Dong Wook Kim, and Cheul Ro Lee. "Growth and Characterization of GaN Nano-Column Grown on Si (111) Substrate Using Au+Ga Alloy Seeding Method by MOCVD." Solid State Phenomena 124-126 (June 2007): 113–18. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.113.

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We have studied the Au+Ga alloy seeding method. Single-crystal GaN nano-column arrays were grown using metalorganic chemical vapor deposition (MOCVD) and their properties were investigated as a function of the growth parameters and Au thin film thickness. Au-coated Si(111) substrates were used for the growth of GaN nano-columns. The diameter and length of as-grown nano-column ranged from 100 to 500 nm and 1 to 5 μm, respectively. The morphology of the columns was investigated using scanning electron microscopy. Energy dispersive X-ray spectroscopy and photoluminescence were used for evaluating

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Cruz García, Cristian Felipe, M. A. Garcia, E. Flores-Romero, et al. "Self-organized gold nanoparticles on SiO2 surface nanopatterns induced by MeV ion implantation." Superficies y Vacío 38 (January 28, 2025): 250101. https://doi.org/10.47566/2025_syv38_1-250101.

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Ion implantation at MeV energies leads to the formation of surface nano-patterns on diverse kinds of materials, such as metals, dielectrics, and semiconductors. Furthermore, under oblique irradiation, the implanted ions are preferentially deposited on the crests of such patterns. Based on previous experimental results, in this work the formation of gold nanoparticles is produced and found to be organized onto prepatterned surfaces as produced by 1.8 MeV Au ion implantation on SiO2 substrates at an impinging angle of 45°. The ion implantation was performed with an ion beam current of 400 nA for

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Darwich, Samer, Karine Mougin, Akshata Rao, Enrico Gnecco, Shrisudersan Jayaraman, and Hamidou Haidara. "Manipulation of gold colloidal nanoparticles with atomic force microscopy in dynamic mode: influence of particle–substrate chemistry and morphology, and of operating conditions." Beilstein Journal of Nanotechnology 2 (February 4, 2011): 85–98. http://dx.doi.org/10.3762/bjnano.2.10.

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One key component in the assembly of nanoparticles is their precise positioning to enable the creation of new complex nano-objects. Controlling the nanoscale interactions is crucial for the prediction and understanding of the behaviour of nanoparticles (NPs) during their assembly. In the present work, we have manipulated bare and functionalized gold nanoparticles on flat and patterned silicon and silicon coated substrates with dynamic atomic force microscopy (AFM). Under ambient conditions, the particles adhere to silicon until a critical drive amplitude is reached by oscillations of the probi

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Shen, Zhenzhen, Aleksey Reiderman, and Casey Anude. "Pressure-less AgNP Sintering for High-power MCM Assembly for Extreme Environment Applications." International Symposium on Microelectronics 2015, no. 1 (2015): 000342–48. http://dx.doi.org/10.4071/isom-2015-wp14.

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Silver nano-particle (AgNP) sintering has been a promising bonding material for high-temperature applications. There is an increasing demand for designs implemented as multi-chip module (MCM) in the high-temperature markets, like the oil and gas industry, primarily because of MCM's smaller size, higher-performance capability, and higher overall reliability when compared to traditional high Tg printed circuit boards. In this work, pressure-less AgNP sintering paste was used in the assembly of multi-chip modules. The assemblies included die-mounted on aluminum nitride and alumina substrates that

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Aslam, Sarmad, Abdul Waqar Rajput, Amir Abbas, Anwar Ul Aleem, and Saad Aslam. "Online structural health monitoring of polymer composite structure using gold nanoparticles (AuNPs)." Mehran University Research Journal of Engineering and Technology 43, no. 2 (2024): 157. http://dx.doi.org/10.22581/muet1982.3085.

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A mechanism for online structural health monitoring of composite structure was established by developing highly sensitive strain gauges based on colloidal Gold Nano Particles (AuNPs). They were synthesized using well known Turkevich-Frens method followed by phase transfer in chloroform using surfactant Cetyltrimethylammonium bromide (CTAB). Flexible Strain gauges / smart sensors were formed by mixing colloidal AuNPs-chloroform solution in polystyrene (PS) – chloroform solution and depositing their thick paste on hand-made flexible thermoplastic polyurethane (TPU) film. These sensors were used

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Chaudhary, Anjali, Divya J. Prakash, R. B. Jacobson, et al. "Electroplating on Unconventional Ultra-Compliant Substrates for Travelling Wave Tube Amplifiers." ECS Meeting Abstracts MA2023-01, no. 22 (2023): 1555. http://dx.doi.org/10.1149/ma2023-01221555mtgabs.

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We report gold electroplating on ultra-compliant substrates comprising helical slow wave structures (SWSs) for traveling wave tube amplifiers (TWTAs) [1]. The novel ultra-compliant substrates are composed of edge-tethered tri-layer metal ribbons with a helical geometry of microscale diameter. After electroplating with gold, we obtain overall thicknesses of a few um. We discuss different controllable electroplating conditions that influence thickness, uniformity, roughness, and related properties of deposited gold films on helical ribbons. In addition to increasing conductance of the electropla

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Dickreuter, Simon, Dieter P. Kern, and Monika Fleischer. "Single particle dark-field spectroscopy of spherical dimers with down to sub-10 nm gaps fabricated by the annealing of nano-pillars." Nanophotonics 7, no. 7 (2018): 1317–24. http://dx.doi.org/10.1515/nanoph-2018-0016.

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AbstractIn this paper we present a method for the fabrication of plasmonic spherical dimers and oligomers with narrow gaps and tunable distances. High-aspect-ratio nano-pillars are created by the two-step evaporation of gold on structured substrates. By using electron beam lithography, it is possible to control the close spacing of the pillars. Rapid thermal annealing causes the pillars to adopt a spherical shape. Since by melting the spheres gain in diameter compared to the initial nano-pillars, the distance between two adjacent spheres can be reduced to below 10 nm. Dimers with different dis

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Tatmyshevskiy, Mikhail K., Dmitry I. Yakubovsky, Olesya O. Kapitanova, et al. "Hybrid Metal-Dielectric-Metal Sandwiches for SERS Applications." Nanomaterials 11, no. 12 (2021): 3205. http://dx.doi.org/10.3390/nano11123205.

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The development of efficient plasmonic nanostructures with controlled and reproducible surface-enhanced Raman spectroscopy (SERS) signals is an important task for the evolution of ultrasensitive sensor-related methods. One of the methods to improving the characteristics of nanostructures is the development of hybrid structures that include several types of materials. Here, we experimentally investigate ultrathin gold films (3–9 nm) near the percolation threshold on Si/Au/SiO2 and Si/Au/SiO2/graphene multilayer structures. The occurring field enhanced (FE) effects were characterized by a record

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Sabah Jameel Mezher, Mohammed O. Dawood, and Bahjat B. Kadhim. "Optical Observations of Sputtered Au-nanostructures and Characterizations." Journal of Techniques 6, no. 1 (2024): 93–102. http://dx.doi.org/10.51173/jt.v6i1.1418.

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o develop novel optoelectronic devices, controlling and predetermined absorption is necessary. In the current work, the gold nano-islands were sputtered onto quartz surface substrates using a DC sputtering unit with an optimized chamber. The effects of the sputtering time (10, 15, and 20 seconds) on the characteristics of the golden layers deposited on quartz substrates were studied. Au nanofilms were investigated by XRD (X-ray diffraction), UV-Vis (ultraviolet-visible light) diffractometer, and AFM (atomic force microscopy) techniques. The thicknesses of the three films prepared at different

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Mo, Yan, Xiaoping Zhang, Ke Zou, et al. "Au Ordered Array Substrate for Rapid Detection and Precise Identification of Etomidate in E-Liquid Through Surface-Enhanced Raman Spectroscopy." Nanomaterials 14, no. 23 (2024): 1958. https://doi.org/10.3390/nano14231958.

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Etomidate (ET), a medical anesthetic, is increasingly being incorporated into e-liquids for consumption and abuse as a new psychoactive substance (NPS), leading to significant social issues. In this work, large-area Au micro- and nano-structured ordered arrays were engineered as surface-enhanced Raman spectroscopy (SERS) substrates for fast detection and precise identification of ET and its metabolites. This ordered array, characterized by abundant electromagnetic enhancement hotspots and structural uniformity, imparts unique properties to the SERS substrate, including ultra-sensitivity, spect

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Zhang, Li, Jinghuai Fang, Chaonan Wang, Tian Xu, and Yonglong Jin. "Fabrication of Superior Au–Ag Composites Surface-Enhanced Raman Scattering Active Substrates Based on One-Step Method of Chemical Etching." Nano 11, no. 07 (2016): 1650080. http://dx.doi.org/10.1142/s1793292016500806.

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Bimetallic silver–gold composites are currently among the most studied substrates for detection based on surface-enhanced Raman scattering (SERS). Here, we developed Au–Ag composite films as high sensitivity, large-scale, chemically stable and reproducible SERS substrates. Au–Ag composite films were fabricated by chemical etching of Ag–Au alloy leaves with HAuCl4 aqueous solutions. Along with galvanic replacement reaction and dealloying, films with distinct microstructural features exhibit dramatic improvement in the SERS intensity. Especially, the Au–Ag composite films with legible nano-ridge

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Cheng, Zhendong. "Nano-enzyme colorimetric biosensor and its application." Highlights in Science, Engineering and Technology 73 (November 29, 2023): 256–63. http://dx.doi.org/10.54097/hset.v73i.12983.

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Nano-enzymatic colorimetric biosensors have emerged as a promising technology for identifying and measuring analytes. These biosensors utilize nano-enzymes, which are nanomaterials with enzyme-like properties, to catalyze reactions that cause color changes. The simplicity, cost-effectiveness, and ability to visually interpret results without complex instrumentation make this colorimetric sensing technique advantageous. The interaction between the analyte and nanomaterial is crucial in the mechanism of these biosensors, where binding of the analyte to the nano-enzyme's surface triggers a cataly

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Manoharan, Gririraj, Petra Bösel, Jannis Thien, et al. "Click-Functionalization of Silanized Carbon Nanotubes: From Inorganic Heterostructures to Biosensing Nanohybrids." Molecules 28, no. 5 (2023): 2161. http://dx.doi.org/10.3390/molecules28052161.

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Here we present an approach to functionalize silanized single-walled carbon nanotubes (SWNTs) through copper-free click chemistry for the assembly of inorganic and biological nanohybrids. The nanotube functionalization route involves silanization and strain-promoted azide–alkyne cycloaddition reactions (SPACC). This was characterized by X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and Fourier transform infra-red spectroscopy. Silane–azide-functionalized SWNTs were immobilized from solution onto patterned substrates through

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Mohammadian, Mina, and Amir Hossein Sari. "Optical and Morphological Studies of Gold Nano Thin Films on Glass Substrates for Surface Plasmon Resonance Sensors." Journal of Nano Research 57 (April 2019): 51–57. http://dx.doi.org/10.4028/www.scientific.net/jnanor.57.51.

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We have observed surface plasmon resonances (SPR) in Au thin films between 18 nm to 27 nm thick deposited onto glass substrates. The observed resonance angles are between 15.5 to 18.75 degrees, which are lower than predicted theoretical values for thicker films. The shift of resonances with the change of refractive index of surrounding confirms its application for nanobio-sensing. A thorough topological surface analysis and transmitted spectra were performed. Au thin films were annealed in Argon and the analysis repeated and compared with those from pre-annealing. The annealing process will ca

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Errachid, Abdelhamid, David Caballero, Eulalia Crespo, et al. "Electropolymerization of nano-dimensioned polypyrrole micro-ring arrays on gold substrates prepared using submerged micro-contact printing." Nanotechnology 18, no. 48 (2007): 485301. http://dx.doi.org/10.1088/0957-4484/18/48/485301.

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