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Journal articles on the topic 'Nanopower'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Feng, Jiandong, Michael Graf, Ke Liu, Dmitry Ovchinnikov, Dumitru Dumcenco, Mohammad Heiranian, Vishal Nandigana, Narayana R. Aluru, Andras Kis, and Aleksandra Radenovic. "Single-layer MoS2 nanopores as nanopower generators." Nature 536, no. 7615 (July 13, 2016): 197–200. http://dx.doi.org/10.1038/nature18593.

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2

Rodriguez-Villegas, Esther, Alexander J. Casson, and Phil Corbishley. "A Subhertz Nanopower Low-Pass Filter." IEEE Transactions on Circuits and Systems II: Express Briefs 58, no. 6 (June 2011): 351–55. http://dx.doi.org/10.1109/tcsii.2011.2158165.

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3

Cannillo, F., C. Toumazou, and T. S. Lande. "Nanopower Subthreshold MCML in Submicrometer CMOS Technology." IEEE Transactions on Circuits and Systems I: Regular Papers 56, no. 8 (August 2009): 1598–611. http://dx.doi.org/10.1109/tcsi.2008.2008275.

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4

Kulej, Tomasz, Fabian Khateb, and Montree Kumngern. "0.3-V Nanopower Biopotential Low-Pass Filter." IEEE Access 8 (2020): 119586–93. http://dx.doi.org/10.1109/access.2020.3005715.

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5

Marraccini, Francesco, Giuseppe De Vita, Stefano Di Pascoli, and Giuseppe Iannaccone. "Low-voltage nanopower clock generator for RFID applications." Microelectronics Journal 39, no. 12 (December 2008): 1736–39. http://dx.doi.org/10.1016/j.mejo.2008.05.008.

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6

Park, Chang-Bum, and Shin-Il Lim. "A Sub-1V Nanopower CMOS Only Bandgap Voltage Reference." Journal of IKEEE 20, no. 2 (June 30, 2016): 192–95. http://dx.doi.org/10.7471/ikeee.2016.20.2.192.

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7

Cucchi, F., S. Di Pascoli, and G. Iannaccone. "Design of a nanopower current reference with reduced process variability." Analog Integrated Circuits and Signal Processing 77, no. 1 (July 14, 2013): 45–53. http://dx.doi.org/10.1007/s10470-013-0105-z.

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8

Given, Robert Parker, Kyle S. Wenger, Virginia D. Wheeler, Brian C. Utter, and Giovanna Scarel. "Fabrication of nanopower generators using thin atomic layer deposited films." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 35, no. 1 (January 2017): 01B120. http://dx.doi.org/10.1116/1.4971403.

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9

Lin, Jing, and Xingyu Huang. "Application of clothing friction nanopower generators in human motion energy acquisition." Nanomaterials and Energy 9, no. 2 (December 1, 2020): 163–72. http://dx.doi.org/10.1680/jnaen.20.00031.

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10

Yan, W., W. Li, and R. Liu. "Nanopower CMOS sub-bandgap reference with 11 ppm/°C temperature coefficient." Electronics Letters 45, no. 12 (2009): 627. http://dx.doi.org/10.1049/el.2009.3705.

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11

Köymen, Itır, Konstantinos N. Glaros, and Emmanuel M. Drakakis. "Class A and Class AB CMOS-Only Nanopower Memristive Dynamics Emulators." International Journal of Bifurcation and Chaos 26, no. 08 (July 2016): 1650127. http://dx.doi.org/10.1142/s0218127416501273.

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Memristive dynamics are generated utilizing active, weak-inversion, CMOS circuits. Class A and Class AB approaches to the generation of these dynamics are presented. The Class A circuit is composed of a grounded capacitor and two exponential transconductors (E-cells). It consumes a few nanowatts of power from a 1V power supply. The Class AB circuit also consists of a similar architecture with an added geometric mean splitter. Simulation results confirm the realization of pinched hysteresis loops exhibiting the zero crossing property of the memristor. The effects of varying input amplitude and frequency as well as the capacitor value are investigated. With the use of MOS capacitors in the place of monolithic capacitors, the area requirements of these emulators can be significantly diminished. Simulation results of circuits with both types of capacitors are presented. The simple emulators presented here offer the possibility of realizing nanoscale memristor dynamics when high yield memristor processes are not accessible.

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12

Gak, Joel, Matias R. Miguez, and Alfredo Arnaud. "Nanopower OTAs With Improved Linearity and Low Input Offset Using Bulk Degeneration." IEEE Transactions on Circuits and Systems I: Regular Papers 61, no. 3 (March 2014): 689–98. http://dx.doi.org/10.1109/tcsi.2013.2284002.

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13

De Vita, G., and G. Iannaccone. "A Sub-1-V, 10 ppm/ $^{\circ}$C, Nanopower Voltage Reference Generator." IEEE Journal of Solid-State Circuits 42, no. 7 (July 2007): 1536–42. http://dx.doi.org/10.1109/jssc.2007.899077.

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14

Luong, Peter, Carlos Christoffersen, Conrado Rossi-Aicardi, and Carlos Dualibe. "Nanopower, Sub-1 V, CMOS Voltage References With Digitally-Trimmable Temperature Coefficients." IEEE Transactions on Circuits and Systems I: Regular Papers 64, no. 4 (April 2017): 787–98. http://dx.doi.org/10.1109/tcsi.2016.2632072.

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15

Bano, Saleha, Ghous Bakhsh Narejo, and S. M. Usman Ali. "Nanopower sub-threshold biquadratic cells and its application to portable ECG system." AEU - International Journal of Electronics and Communications 107 (July 2019): 57–69. http://dx.doi.org/10.1016/j.aeue.2019.05.001.

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16

Khateb, Fabian, Tomasz Kulej, Meysam Akbari, and Pavel Steffan. "0.3-V Bulk-Driven Nanopower OTA-C Integrator in 0.18 µm CMOS." Circuits, Systems, and Signal Processing 38, no. 3 (July 19, 2018): 1333–41. http://dx.doi.org/10.1007/s00034-018-0901-x.

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17

Chiang, Yu-Hsuan, and Shen-Iuan Liu. "Nanopower CMOS Relaxation Oscillators With Sub-100 $\hbox{ppm}/^{\circ}\hbox{C}$ Temperature Coefficient." IEEE Transactions on Circuits and Systems II: Express Briefs 61, no. 9 (September 2014): 661–65. http://dx.doi.org/10.1109/tcsii.2014.2331110.

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18

SINGH, SHUBRA, S. BHASKAR REDDY, M. KOTTAISAMY, and M. S. RAMACHANDRA RAO. "FORMATION OF ZnO NANOBRUSHES IN DIRECT ATMOSPHERE USING A CARBON CATALYST AND A Zn METAL SOURCE." Nano 03, no. 05 (October 2008): 361–65. http://dx.doi.org/10.1142/s1793292008001209.

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In this paper we report on the preparation of nanobrushes of ZnO on quartz substrate by a direct atmosphere evaporation method using Zn metal flakes. Activated charcoal was used as a catalyst that facilitated the formation of nanobrushes in which the brush stem was about 15–20 μm in length and the bristles (100–200 nm thick) were made up of nanofibrous ZnO whose tips were 10–15 nm in width and were angled in some cases. These aligned nanobrushes can find potential applications as nanopower generators and high aspect ratio AFM probes by virtue of the piezoelectric property of ZnO . This technique is simple for realizing aligned ZnO nanobrushes with metallic Zn as the source material.

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19

Lipchansky, Dmitry, and Olga B. Nazarenko. "Thermooxidative Degradation of Composites Based on Epoxy Resin and Metal Nanopowders." Materials Science Forum 942 (January 2019): 11–20. http://dx.doi.org/10.4028/www.scientific.net/msf.942.11.

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The thermooxidative degradation behavior of the epoxy composites filled with metal nanopowders has been investigated by thermogravimetric analysis under nonisothermal conditions in air atmosphere. The mechanical characteristics of epoxy composites were also studied by three-point bending method. The comparison of two different types of metal nanopowder was made. Aluminum and copper nanopowders prepared by electrical explosion of wires were used as fillers separately as well as in combination with conventional fame-retardant boric acid. It was shown that aluminum nanopowder increased slightly thermal stability of the epoxy composites. On the contrary, the introduction of copper nanopowder in epoxy resin led to rapid degradation of the epoxy composite. The combination of metal nanopowders and boric acid improved thermal stability of the epoxy composites. The highest flexural properties showed the epoxy composite filled with copper nanopowder.

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20

Corbishley, Phil, and Esther Rodriguez-Villegas. "A Nanopower Bandpass Filter for Detection of an Acoustic Signal in a Wearable Breathing Detector." IEEE Transactions on Biomedical Circuits and Systems 1, no. 3 (September 2007): 163–71. http://dx.doi.org/10.1109/tbcas.2007.913129.

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21

Sawigun, Chutham, and Surachoke Thanapitak. "A Nanopower Biopotential Lowpass Filter Using Subthreshold Current-Reuse Biquads With Bulk Effect Self-Neutralization." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 5 (May 2019): 1746–57. http://dx.doi.org/10.1109/tcsi.2018.2885954.

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22

Zhi-hui, Chen, Qiu Jun-fu, Liu Cheng, Ding Jian-ning, and Zhu Yuan-yuan. "Preparation of Bi4Ti3O12 nanopower by azeotropic co-precipitation and dielectric properties of the sintered ceramic." Ceramics International 36, no. 1 (January 2010): 241–44. http://dx.doi.org/10.1016/j.ceramint.2009.07.022.

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23

Korolev, A. M., V. M. Shulga, I. A. Gritsenko, and G. A. Sheshin. "PHEMT as a circuit element for high impedance nanopower amplifiers for ultra-low temperatures application." Cryogenics 67 (April 2015): 31–35. http://dx.doi.org/10.1016/j.cryogenics.2015.01.003.

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24

Ma, Jian, Qingyu Zeng, Lijian Zhan, Jingwen Mo, Yan Zhang, and Zhonghua Ni. "Power Generation from Salinity Gradient by Reverse Electrodialysis in Silicon Nitride Nanopores." Nano 15, no. 11 (November 2020): 2050148. http://dx.doi.org/10.1142/s1793292020501489.

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Solid-state nanopores have shown great potential in investigating salinity gradient energy generation as a renewable power generator. In this work, various diameter silicon nitride (Si3N[Formula: see text] nanopores were fabricated to investigate the power generation between two potassium chloride solutions with different concentration gradient ratios by reverse electrodialysis. The maximal estimated power density of a Si3N4 nanopore measured experimentally can be high to 16[Formula: see text]649Wm[Formula: see text]. To compare with the single Si3N4 nanopore, multiple nanopores array has also been investigated. The equivalent circuit model of multiple Si3N4 nanopores array generator is quantitatively constructed by massive reproducible experimental data and theoretical derivation. For nanopore array, the osmotic current basically keep a linear growth with the number of the nanopores at every concentration ratio. While, the osmotic voltage is basically independent on the number of nanopore. The power generation circuit of the nanopore array can be regarded as a parallel circuit of multiple nanopores. Power generation from concentration gradients in Si3N4 nanopores could be widely used in a variety of applications like ultra-low power devices and micro-nano electromechanical systems.

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25

Jastrzębska, Agnieszka Maria, Ewa Karwowska, Andrzej R. Olszyna, and Antoni R. Kunicki. "Comparative Assessment of Antimicrobial Efficiency of Ionic Silver, Silver Monoxide, and Metallic Silver Incorporated onto an Aluminum Oxide Nanopowder Carrier." Journal of Nanoscience 2013 (September 17, 2013): 1–12. http://dx.doi.org/10.1155/2013/263583.

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The present paper provides comparative assessment of antimicrobial efficiency of ionic silver (Ag+), silver monoxide (Ag2O), and metallic silver (Ag) incorporated onto an aluminum oxide nanopowder carrier (Al2O3). The deposition of Ag+ ions, Ag2O nanoparticles, and Ag nanoparticles on an different phases of aluminum oxide nanopowder carrier was realized using consecutive stages of dry sol-gel method. The Al2O3-Ag+, Al2O3-Ag2O, and Al2O3-Ag nanopowders were widely characterized qualitatively and quantitatively by SEM, physical nitrogen sorption and XRD analyses. Results indicate that the Al2O3 nanopowders added with Ag+, Ag2O, and Ag, apart from phase composition, were not differing considerably from one another in terms of their morphology and physical properties. However, nanopowders of Al2O3-Ag were more agglomerated than Al2O3-Ag2O and Al2O3-Ag+ nanopowders. The antibacterial activity of the nanopowders was examined by the spread plate method using bacterial strains such as Escherichia coli, Sarcina lutea, and Bacillus subtilis. The best antibacterial properties against Sarcina lutea strain were achieved in the amorphous-Al2O3-Ag+ and Al2O3-Ag2O nanopowders, whereas the worst antimicrobial activity against Bacillus subtilis and Escherichia coli was shown by the Al2O3-Ag+ and Al2O3-Ag nanopowders. The observed increase of the antibacterial activity as the silver content was not however significant for Al2O3-Ag nanopowders. The results obtained in the present experiments show that the Al2O3-Ag+, Al2O3-Ag2O, and Al2O3-Ag nanopowders, possessing good bactericidal properties, can be produced by using consecutive stages of dry sol-gel method, and Al2O3 nanopowder added with Ag2O is considered as the best raw material in the production of antiseptic materials.

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26

Takai, Natsumi, Kan Shoji, Tei Maki, and Ryuji Kawano. "Simple Fabrication of Solid-State Nanopores on a Carbon Film." Micromachines 12, no. 9 (September 21, 2021): 1135. http://dx.doi.org/10.3390/mi12091135.

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Solid-state nanopores are widely used as a platform for stochastic nanopore sensing because they can provide better robustness, controllable pore size, and higher integrability than biological nanopores. However, the fabrication procedures, including thin film preparation and nanopore formation, require advanced micro-and nano-fabrication techniques. Here, we describe the simple fabrication of solid-state nanopores in a commercially available material: a flat thin carbon film-coated micro-grid for a transmission electron microscope (TEM). We attempted two general methods for nanopore fabrication in the carbon film. The first method was a scanning TEM (STEM) electron beam method. Nanopores were fabricated by irradiating a focused electron beam on the carbon membrane on micro-grids, resulting in the production of nanopores with pore diameters ranging from 2 to 135 nm. The second attempt was a dielectric breakdown method. In this method, nanopores were fabricated by applying a transmembrane voltage of 10 or 30 V through the carbon film on micro-grids. As a result, nanopores with pore diameters ranging from 3.7 to 1345 nm were obtained. Since these nanopores were successfully fabricated in the commercially available carbon thin film using readily available devices, we believe that these solid-state nanopores offer great utility in the field of nanopore research.

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27

Sharma, Sanjeev K., Ashish R. Sharma, Sudheer D. V. N. Pamidimarri, Jyotshana Gaur, Beer Pal Singh, Sankar Sekar, Deuk Young Kim, and Sang Soo Lee. "Bacterial Compatibility/Toxicity of Biogenic Silica (b-SiO2) Nanoparticles Synthesized from Biomass Rice Husk Ash." Nanomaterials 9, no. 10 (October 11, 2019): 1440. http://dx.doi.org/10.3390/nano9101440.

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Biogenic silica (b-SiO2) nanopowders from rice husk ash (RHA) were prepared by chemical method and their bacterial compatibility/toxicity was analyzed. The X-ray diffractometry (XRD) patterns of the b-SiO2 nanopowders indicated an amorphous feature due to the absence of any sharp peaks. Micrographs of the b-SiO2 revealed that sticky RHA synthesized SiO2 nanopowder (S1) had clustered spherical nanoparticles (70 nm diameter), while b-SiO2 nanopowder synthesized from red RHA (S2) and b-SiO2 nanopowder synthesized from brown RHA (S3) were purely spherical (20 nm and 10 nm diameter, respectively). Compared to the S1 (11.36 m2g−1) and S2 (234.93 m2g−1) nanopowders, the S3 nanopowders showed the highest surface area (280.16 m2g−1) due to the small particle size and high porosity. The core level of the X-ray photoelectron spectroscopy (XPS) spectra showed that Si was constituted by two components, Si 2p (102.2 eV) and Si 2s (153.8 eV), while Oxygen 1s was observed at 531.8 eV, confirming the formation of SiO2. The anti-bacterial activity of the b-SiO2 nanopowders was investigated using both gram-positive (Escherichia coli) and gram-negative (Staphylococcus aureus) microorganisms. Compared to S2 and S3 silica nanopowders, S1 demonstrated enhanced antibacterial activity. This study signifies the medical, biomedical, clinical, and biological importance and application of RHA-mediated synthesized b-SiO2.

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28

Dini, Michele, Aldo Romani, Matteo Filippi, and Marco Tartagni. "A Nanopower Synchronous Charge Extractor IC for Low-Voltage Piezoelectric Energy Harvesting With Residual Charge Inversion." IEEE Transactions on Power Electronics 31, no. 2 (February 2016): 1263–74. http://dx.doi.org/10.1109/tpel.2015.2417352.

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29

Ravi, Sai Kishore, Tingfeng Wu, Vishnu Saran Udayagiri, Xuan Minh Vu, Yanan Wang, Michael R. Jones, and Swee Ching Tan. "Photosynthetic Bioelectronic Sensors for Touch Perception, UV-Detection, and Nanopower Generation: Toward Self-Powered E-Skins." Advanced Materials 30, no. 39 (August 12, 2018): 1802290. http://dx.doi.org/10.1002/adma.201802290.

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30

Singh, Devender, Senthil Narayanaperumal, Kashif Gul, Marcelo Godoi, Oscar Endrigo Dorneles Rodrigues, and Antonio Luiz Braga. "ChemInform Abstract: Efficient Synthesis of Selenoesters from Acyl Chlorides Mediated by CuO Nanopower in Ionic Liquid." ChemInform 41, no. 44 (October 7, 2010): no. http://dx.doi.org/10.1002/chin.201044190.

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31

Park, Sung, Ju Hyeon Lee, Kang Yoo, Hye Jung Park, Yun Joong Chung, and Jae Chun Lee. "Removal of Total Organic Carbon from Aqueous Phenol Solution Using Photocatalytic ZnO Nanopowders Prepared by Solution Combustion Method." Materials Science Forum 558-559 (October 2007): 1335–38. http://dx.doi.org/10.4028/www.scientific.net/msf.558-559.1335.

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ZnO nanopowders were prepared by Solution Combustion Method (SCM). The ZnO nanopowders synthesized using Zn(OH)2 and glycine as an oxidant and a fuel (with fuel/ oxidant ratio, F/O=0.8), showed excellent crystalline and photocatalytic characteristics. To confirm photocatalytic activities of the prepared ZnO powder, total organic carbon (TOC) was tried to remove from aqueous phenol solution. Surprisingly, SCM ZnO nanopowder shows 1.6 fold higher destruction rates of the organic pollutant than P-25 TiO2 nanopowder which is known as a kind of standard photocatalyst.

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32

Liu, Li Ping, Hong Wen Wu, Yang Xuan, Xiao Juan Wang, Yan Zhang, Yi Wen Chen, and Quan Jun Liu. "Study on the Size Shrinking and Shape Changing of Solid-State Nanopores." Advanced Materials Research 189-193 (February 2011): 3218–21. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3218.

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Nanopores etched in the solid-state membranes have become the hotpot of nanotechnology research. Various methods for fabricating solid-state nanopores have been developed and reported, but the fabrication of nanopore is also a difficult challenge. In this paper, we milled nanopores of different sizes in the free-stand and low-stress solid-state membranes. And then the area around nanopores were scanned with the diffused ion beam, we found that the sediment around will melt and the shape of the nanopore becomes circular.

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33

Kolesnikov, Evgeny, Vera Levina, Anna Godymchuk, Denis V. Kuznetsov, and Nikolay Polushin. "Synthesis of Cobalt Nanopowder Using Surfactants of Different Nature." Advanced Materials Research 1085 (February 2015): 7–11. http://dx.doi.org/10.4028/www.scientific.net/amr.1085.7.

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The synthesis of controlled dispersity nanopowders is a vital nanotechnology task. This paper describes how the type of surfactants used during the hydroxide precursor Co (OH)2 precipitation influences the dispersity of cobalt nanopowder obtained by the process of hydroxide reduction. It has been determined that the usage of surfactants may both increase and decrease the nanopowders dispersity: when using 0.1 wt.% “cetylpyridinium chloride – no surfactants – EDTA sodium salt – polyethylene glycol – sodium lauryl sulfate” surfactant solutions, during the precipitation process the specific surface of the obtained metallic nanopowder was equal to “3.7 – 4.5 – 5.0 – 6.0 – 9.5 m2/g”, respectively.

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34

Magnelli, Luca, Felice Crupi, Pasquale Corsonello, and Giuseppe Iannaccone. "A sub-1 V nanopower temperature-compensated sub-threshold CMOS voltage reference with 0.065%/V line sensitivity." International Journal of Circuit Theory and Applications 43, no. 4 (September 20, 2013): 421–26. http://dx.doi.org/10.1002/cta.1950.

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35

SU, XIAOLEI, YONGSHENG TAN, YAN JIA, KAILI ZHAO, JUNBO WANG, JIE XU, XINHAI HE, CHONG FU, and SONGTAO LIU. "EFFECT OF REACTION TIME ON MICROSTRUCTURE, DIELECTRIC PROPERTY AND MICROWAVE ABSORPTION PROPERTY OF Cu-DOPED SiC NANOPOWDER." Nano 09, no. 02 (February 2014): 1450022. http://dx.doi.org/10.1142/s1793292014500222.

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Cu -doped SiC nanopowders have been prepared via combustion synthesis of the silicon and carbon system in a 0.1 MPa nitrogen atmosphere under different reaction time, using copper as the dopant and PTFE as the chemical activator, respectively. X-ray diffraction, scanning electronic microscope and Raman spectra have been used to characterize the phase and morphology of prepared nanopowders. Results indicate that the lattice constant of prepared Cu -doped SiC nanopowder decreases with extending reaction time. The prepared nanopowders have fine spherical particles and narrow particle size distribution and the particle size increases with increasing reaction time. The electric permittivities of prepared Cu -doped SiC nanopowders in the frequency range of 8.2–12.4 GHz have been determined. The real part ε′, imaginary part ε′′ and dielectric loss tgδ of complex permittivity decrease with increasing reaction time. All prepared Cu -doped SiC nanopowder exhibits good microwave absorption property in the frequency range of 8.2–12.4 GHz.

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36

Choi, C. J., J. H. Yu, and Jung Goo Lee. "Characterization and Sintering Behaviors of Fe Based Nanopowders Prepared by Arc Discharge Process." Materials Science Forum 638-642 (January 2010): 1755–59. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1755.

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The formation of Fe nanopowders by Plasma Arc discharge process and sintering behavior of Fe nanopowder has been investigated. The effect of processing parameters on the size and microstructure and their pressureless sintering behaviors have been analyzed. Also the addition effect of micron powder to nanopowder on the compaction and sintering was studied. The prepared Fe nanpowder showed nearly spherical shape with the average size of 100 nm. The surface oxide layer of nanopowder played an important role on the initial densification of the green compact. The hardness and sintered density of nano/micron bimodal powder was similar to those of pure nanopowder.

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37

Li, Xiao Xi, Ling Chen, Bing Li, and Lin Li. "Preparation of Zirconia Nanopowders in Ultrasonic Field by the Sol-Gel Method." Key Engineering Materials 280-283 (February 2007): 981–86. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.981.

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Zirconia nanopowders were prepared in the ultrasonic field by the sol-gel method and the sonochemical effect on the structure of zirconium hydroxide and the zirconia nanopowder properties were systematically investigated in this work. Ultrasound was introduced into the different stages of the synthesis of zirconia nanopowders in sol-gel reaction system, and zirconium hydroxides and the zirconia nanopowders with different properties were obtained. The results indicated that ultrasonic cavitation could not only disaggregate the agglomerates of zirconia colloidal particles but also reduce the amount of coordinated H2O, free H2O and free hydroxyl groups of the zirconium hydroxide colloidal particles, thus effectively preventing the formation of hard agglomerates in zirconia powders. Moreover, the effects of different ultrasonic output powers and treatment cycles on the structure and properties of ZrO2 nanopowders were studied by TEM, XRD and SAXS. Zirconia nanopowders with an extremely small crystallite size (10.3 nm) and a narrow size distribution were yielded with 520 W ultrasound for 6 treatment cycles on the formation period and 600 W ultrasound for 2 treatment cycles on the washing period. It is concluded that the ultrasonic field is a potential method for nanopowder preparation.

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38

Willems, Kherim, Veerle Van Meervelt, Carsten Wloka, and Giovanni Maglia. "Single-molecule nanopore enzymology." Philosophical Transactions of the Royal Society B: Biological Sciences 372, no. 1726 (June 19, 2017): 20160230. http://dx.doi.org/10.1098/rstb.2016.0230.

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Biological nanopores are a class of membrane proteins that open nanoscale water conduits in biological membranes. When they are reconstituted in artificial membranes and a bias voltage is applied across the membrane, the ionic current passing through individual nanopores can be used to monitor chemical reactions, to recognize individual molecules and, of most interest, to sequence DNA. In addition, a more recent nanopore application is the analysis of single proteins and enzymes. Monitoring enzymatic reactions with nanopores, i.e. nanopore enzymology, has the unique advantage that it allows long-timescale observations of native proteins at the single-molecule level. Here, we describe the approaches and challenges in nanopore enzymology. This article is part of the themed issue ‘Membrane pores: from structure and assembly, to medicine and technology’.

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39

Zhao, Liang, Shuang Yao, Yong Qiang Li, Zhi Long Zhao, and Qun Hu Xue. "Effects of Calcium Oxide and Magnesium Oxide Stabilizing Agents on the Critical Transformation Size of Tetragonal Zirconia." Materials Science Forum 980 (March 2020): 15–24. http://dx.doi.org/10.4028/www.scientific.net/msf.980.15.

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The preparation of tetragonal zirconia nanopowders by sol–gel method using zirconium oxychloride as raw material, ammonia water and sodium hydroxide solution as precipitant, and calcium oxide or magnesium oxide powders as stabilizing agents is described. After suction filtration, drying, and calcination, tetragonal zirconia nanopowders with different particle size and tetragonal phase content were obtained. The particle size and phase composition of the powders are characterized by using a laser particle size analyzer and an X-ray diffractometer, and the tetragonal phase content and grain size are calculated from the crystal plane formula and Scherrer formula. The analysis of the relationship between the tetragonal phase content and the particle size of the zirconia nanopowders stabilized by calcium oxide and magnesium oxide at room temperature reveals the inhibitory effect of the stabilizing agents on the growth of zirconia grains. The stabilized zirconia nanopowder is finer than unstabilized zirconia nanopowder, and the particle distribution is more uniform in the former. The stabilizing effect of calcium oxide is superior to that of magnesium oxide; the critical transformation size of the zirconia grains stabilized by calcium oxide is the largest, and that of unstabilized zirconia is the smallest. The critical transformation size of calcium oxide-stabilized, magnesium oxide-stabilized, and unstabilized zirconia nanopowders is 18–22.6 nm, 24–28 nm, and 26–33.6 nm, respectively. Under the same calcination condition, the calcium oxide-stabilized zirconia nanopowder retains the highest tetragonal phase content at room temperature.

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Zou, Min Ming, Mi Yan, Fu Jun Shang, Wei Huang, Yong Liu, Ji Hong Su, Wen Lu Shi, Run Zhen Wang, and Xiang Yu Chen. "The Oxidation Resistance of Cu-Ag Alloy Nanopowders Prepared by Induction Plasma Technology." Applied Mechanics and Materials 151 (January 2012): 28–31. http://dx.doi.org/10.4028/www.scientific.net/amm.151.28.

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The Cu-30wt%Ag alloy nanopowders are prepared by induction plasma technology, and the nanopowder is successfully coated by terpineol (C10H18O). The morphology, phase composition and oxidation resistance of nanopowders are characterized by scanning electron microscopy (SEM), X-ray diffraction and thermogravimetric (TG) analysis. When the suitable processing parameters of induction plasma are chosen, the spherical morphology and average diameter about 89 nm of Cu-30wt%Ag nanopowders are obtained. Meanwhile, the Cu-Ag alloy nanopowders which are coated by terpineol are free from oxidation when temperature is below 280°C.

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Salem, Hanadi G., Sherif El-Eskandarany, Amr Kandil, and Hassan Abdul Fattah. "Bulk Behavior of Ball Milled AA2124 Nanostructured Powders Reinforced with TiC." Journal of Nanomaterials 2009 (2009): 1–12. http://dx.doi.org/10.1155/2009/479185.

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In the current research work, a top-down approach was employed for the refinement of a micron scale AA2124 alloy powder 40 μm in average size using high-energy ball milling up to 60 hours. The produced nanopowders were investigated compared to the micron gas atomized powder both in the monolithic and the reinforced composite states. 1 μm powder of TiC with internal structure <100 nm was used for the reinforcement of the 2124-Al matrices. Milling time of 36 hours produced a <100 nm nanopowders with internal structure size <20 nm. The nanopowder monolithic consolidates exhibited compressive strength of 388 MPa compared to 313 MPa for micronpowder one. Addition of TiC nanostructured powder to the nanopowder consolidated matrix resulted in increase of 130% in compressive strength compared to that produced for the microscale one. Nanopowder of Alalloys produced by mechanical milling reinforced with 10 wt% TiC is recommended for products suitable for high wear and erosion resistance applications. Peak aging increased the hardness and compressive strength of the as compacted micronpowder matrices by an average of 188% and 123%, while increased that of the nanopowder matrices by an average of 110% and 117%, respectively.

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Mostovshchikov, Andrei V., Alexander P. Ilyin, Irina K. Zabrodina, Liudmila O. Root, and Daniar V. Ismailov. "Measuring the Changes in Copper Nanopowder Conductivity during Heating as a Method for Diagnosing its Thermal Stability." Key Engineering Materials 769 (April 2018): 146–51. http://dx.doi.org/10.4028/www.scientific.net/kem.769.146.

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This work researches the impact of the temperature of compacted copper nanopowder on the amperage of the current flowing through the nanopowder sample. It was determined that upon reaching its oxidation temperature (~ 1900C), the copper nanopowder started conducting electricity, and at 280-320°C electric breakdown of sample was occurring. This is caused to irreversible processes taking place in nanomaterials during heating, such as sintering and mass-transfer, those processes leading to the formation of conductivity channels. This speaks in favor of an evident dependency between copper nanopowder conductivity and the chemical transformations taking place in it; this allows for recommending this research method for instant diagnostics of copper nanopowders.

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Ruksudjarit, A., and Gobwute Rujijanagul. "Synthesis of SiO₂ Nanopowder from Rice Husk Ash." Advanced Materials Research 55-57 (August 2008): 649–52. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.649.

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In the present work, we demonstrate a method to synthesis SiO2 nanopowder from rice husk ash by using a vibro-milling followed by a heat treatment technique. Rice husk ash was milled by vibro-milling for 4 h to obtain nanopowder. In order to eliminate carbonaceous material, the nanopowder was heat at 1000°C for 3 h. Characteristic of the powder was then investigated by XRF, XRD, and SEM techniques. The silica nanopowder with 95% purity was obtained after the heat-treatment. The result indicated that the present method is a beneficial process to produce the silica nanopowders of low cost and high mass productivity.

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Pal, Pratosh Kumar, and R. K. Nagaria. "A Sub-1 V nanopower subthreshold current and voltage reference using current subtraction technique and cascoded active load." Integration 71 (March 2020): 115–24. http://dx.doi.org/10.1016/j.vlsi.2019.11.016.

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Liu, Li Ping, Hong Wen Wu, Hang Liu, Jing Lin Kong, and Quan Jun Liu. "Distribution Time of Gold Nanoparticles Pass through the Solid State Nanopore in Deionized Water." Advanced Materials Research 646 (January 2013): 67–71. http://dx.doi.org/10.4028/www.scientific.net/amr.646.67.

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Nanopore has the proming to be used as the detection senser for the single molecule at single molecular level or the nanoparticles in different meterials. The diameters of the nanopores can be changed in a large rang with the increasing fabrication technology. For this case, the nanopore could be used as particles‘ sizes senser. We used 15nm gold nanoparticles as exsamples to analyze the effects of nanopore/nanoparticle ratio in deionized water. In the detection experiments, we found that the gold nanoparticles would pass through the nanopore in different behaves. Besides, the diameters of the nanopores might effect the precision accuracy of the translocation events. In view of the former results, we notice that on the basis of nanopore detection technique, nanoparticles translocation share many similarities with DNA.

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Соковнин, С. Ю., В. Г. Ильвес, М. Е. Балезин, and М. А. Уймин. "Исследование свойств нанопорошка фторида кальция после облучения наносекундным электронным пучком." Письма в журнал технической физики 46, no. 8 (2020): 47. http://dx.doi.org/10.21883/pjtf.2020.08.49310.18214.

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Mesoporous CaF2 nanopowders with specific surface area up to 91.5 m2/g have been produced using by electron beam evaporation method in vacuum. The effect of nanosecond e-beam irradiation in air on magnetic and texture properties this nanopowders has been studied. The irradiation influence on the specific surface area and magnetization of CaF2 nanopowder has been discovered for the first time.

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Liu, Lei, Bing Wang, Yue Yang, Zhong Hua Ni, and Yun Fei Chen. "Fabrication of Organic-Inorganic Hybrid Nanopore and its Application in Biosensing." Key Engineering Materials 562-565 (July 2013): 658–63. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.658.

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Nanopore and nanopore based bio-sensing technology have become into more and more interesting research area in the past ten years. In this work, micro-pore in Si-S3N4 chips was fabricated and characterized by Focused Ion Beam (dual Beam), and then the S3N4 pore was covered by Polycarbonate (PC) membrane containing 50nm nanopores and sealed by using polydimethylsiloxane (PDMS) to get hybrid micro-nanopores. The obtained chip with hybrid nanopores together with two liquid cells was integrated into an ionic current detection device for biosensing. Based on this device, λ-DNA in the electrolytic solution can be detected when it is electrophoretically driven through the hybrid nanopores, and different gestures of λ-DNA in translocation also can be discriminated.

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Lin, Hong Yan, Chun Cai Wang, and Bing Sun. "Study on Ni Nanowires Prepared in AAO Template." Advanced Materials Research 557-559 (July 2012): 515–18. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.515.

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Order nanopore arrays were made by a two-step anodization process. The effect of temperature on the order of nanopore arrays was studied. The result shows that the order is bad when the temperature is too high or too low. Then deposit Ni nanowire arrays in nanopores of AAO templates by direct current deposition. Nanowires deposited in AAO template have uniform length and thickness and the shape of nanowires is the same with that of nanopores. And the growth of the nanowires is from the bottom of the nanopores. Finally, the effect of pore diameter on activation energy of nickel deposited in nanopores was studied. The results show that the smaller the pore diameter the smaller the reaction activation energy, that is more conducive to the reaction.

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Acar, Elif Turker, Steven F. Buchsbaum, Cody Combs, Francesco Fornasiero, and Zuzanna S. Siwy. "Biomimetic potassium-selective nanopores." Science Advances 5, no. 2 (February 2019): eaav2568. http://dx.doi.org/10.1126/sciadv.aav2568.

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Reproducing the exquisite ion selectivity displayed by biological ion channels in artificial nanopore systems has proven to be one of the most challenging tasks undertaken by the nanopore community, yet a successful achievement of this goal offers immense technological potential. Here, we show a strategy to design solid-state nanopores that selectively transport potassium ions and show negligible conductance for sodium ions. The nanopores contain walls decorated with 4′-aminobenzo-18-crown-6 ether and single-stranded DNA (ssDNA) molecules located at one pore entrance. The ionic selectivity stems from facilitated transport of potassium ions in the pore region containing crown ether, while the highly charged ssDNA plays the role of a cation filter. Achieving potassium selectivity in solid-state nanopores opens new avenues toward advanced separation processes, more efficient biosensing technologies, and novel biomimetic nanopore systems.

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Ding, Taoli, Jing Yang, Victor Pan, Nan Zhao, Zuhong Lu, Yonggang Ke, and Cheng Zhang. "DNA nanotechnology assisted nanopore-based analysis." Nucleic Acids Research 48, no. 6 (February 21, 2020): 2791–806. http://dx.doi.org/10.1093/nar/gkaa095.

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Abstract Nanopore technology is a promising label-free detection method. However, challenges exist for its further application in sequencing, clinical diagnostics and ultra-sensitive single molecule detection. The development of DNA nanotechnology nonetheless provides possible solutions to current obstacles hindering nanopore sensing technologies. In this review, we summarize recent relevant research contributing to efforts for developing nanopore methods associated with DNA nanotechnology. For example, DNA carriers can capture specific targets at pre-designed sites and escort them from nanopores at suitable speeds, thereby greatly enhancing capability and resolution for the detection of specific target molecules. In addition, DNA origami structures can be constructed to fulfill various design specifications and one-pot assembly reactions, thus serving as functional nanopores. Moreover, based on DNA strand displacement, nanopores can also be utilized to characterize the outputs of DNA computing and to develop programmable smart diagnostic nanodevices. In summary, DNA assembly-based nanopore research can pave the way for the realization of impactful biological detection and diagnostic platforms via single-biomolecule analysis.

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