scholarly journals Highly enhanced response of MoS2/porous silicon nanowire heterojunctions to NO2 at room temperature

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 11070-11077 ◽  
Author(s):  
Shufen Zhao ◽  
Zhengcao Li ◽  
Guojing Wang ◽  
Jiecui Liao ◽  
Shasha Lv ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Molybdenum Disulfide ◽  
Gas Sensors ◽  
Room Temperature ◽  
Silicon Nanowire ◽  
Porous Silicon Nanowire ◽  
Nanowire Heterojunctions

Molybdenum disulfide/porous silicon nanowire (MoS2/PSiNW) heterojunctions with different thicknesses as highly-responsive NO2 gas sensors were obtained in the present study.

ZnO nanorod/porous silicon nanowire hybrid structures as highly-sensitive NO2 gas sensors at room temperature

2016 ◽  
Vol 18 (6) ◽  
pp. 4835-4841 ◽  
Author(s):  
Jiecui Liao ◽  
Zhengcao Li ◽  
Guojing Wang ◽  
Chienhua Chen ◽  
Shasha Lv ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Gas Sensors ◽  
Silicon Nanowires ◽  
Room Temperature ◽  
Silicon Nanowire ◽  
Hybrid Structures ◽  
Zno Nanorod ◽  
Highly Sensitive ◽  
Porous Silicon Nanowires ◽  
Porous Silicon Nanowire

The obtained hybrid structures (ZnO nanorod/porous silicon nanowires) could be applied as highly sensitive NO2 gas sensors at room temperature.

CF4 Plasma-treated Porous Silicon Nanowire Arrays Laminated with MnO2 Nanoflakes for Asymmetric Pseudocapacitors

2021 ◽  
pp. 129515
Author(s):  
Indrajit V. Bagal ◽  
Nilesh R. Chodankar ◽  
Aadil Waseem ◽  
Muhammad Ali Johar ◽  
Swati J. Patil ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Silicon Nanowire ◽  
Nanowire Arrays ◽  
Silicon Nanowire Arrays ◽  
Porous Silicon Nanowire

Effect of current density on the porous silicon preparation as gas sensors**

2021 ◽  
Vol 30 (1) ◽  
pp. 257-264
Author(s):  
Muna H. Kareem ◽  
Adi M. Abdul Hussein ◽  
Haitham Talib Hussein
Keyword(s):  
Porous Silicon ◽  
Gas Sensors ◽  
Current Density ◽  
Room Temperature ◽  
Low Cost ◽  
High Surface ◽  
Volume Ratio ◽  
Etching Time ◽  
Force Microscopy ◽  
Materials Used

Abstract In this study, porous silicon (PSi) was used to manufacture gas sensors for acetone and ethanol. Samples of PSi were successfully prepared by photoelectrochemical etching and applied as an acetone and ethanol gas sensor at room temperature at various current densities J= 12, 24 and 30 mA/cm2 with an etching time of 10 min and hydrofluoric acid concentration of 40%. Well-ordered n-type PSi (100) was carefully studied for its chemical composition, surface structure and bond configuration of the surface via X-ray diffraction, atomic force microscopy, Fourier transform infrared spectroscopy and photoluminescence tests. Results showed that the best sensitivity of PSi was to acetone gas than to ethanol under the same conditions at an etching current density of 30 mA/cm2, reaching about 2.413 at a concentration of 500 parts per million. The PSi layers served as low-cost and high-quality acetone gas sensors. Thus, PSi can be used to replace expensive materials used in gas sensors that function at low temperatures, including room temperature. The material has an exceptionally high surface-to-volume ratio (increasing surface area) and demonstrates ease of fabrication and compatibility with manufacturing processes of silicon microelectronics.

scholarly journals Label-Free Virus Capture and Release by a Microfluidic Device Integrated with Porous Silicon Nanowire Forest

Small ◽  
2016 ◽  
Vol 13 (6) ◽  
pp. 1603135 ◽  
Author(s):  
Yiqiu Xia ◽  
Yi Tang ◽  
Xu Yu ◽  
Yuan Wan ◽  
Yizhu Chen ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Microfluidic Device ◽  
Silicon Nanowire ◽  
Label Free ◽  
Free Virus ◽  
Capture And Release ◽  
Porous Silicon Nanowire

scholarly journals Thermal conductivity in porous silicon nanowire arrays

2012 ◽  
Vol 7 (1) ◽  
pp. 554 ◽  
Author(s):  
Jeffrey M Weisse ◽  
Amy M Marconnet ◽  
Dong Kim ◽  
Pratap M Rao ◽  
Matthew A Panzer ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Porous Silicon ◽  
Silicon Nanowire ◽  
Nanowire Arrays ◽  
Silicon Nanowire Arrays ◽  
Porous Silicon Nanowire

Photoluminescence origins of the porous silicon nanowire arrays

2011 ◽  
Vol 110 (7) ◽  
pp. 073109 ◽  
Author(s):  
L. H. Lin ◽  
X. Z. Sun ◽  
R. Tao ◽  
Z. C. Li ◽  
J. Y. Feng ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Silicon Nanowire ◽  
Nanowire Arrays ◽  
Silicon Nanowire Arrays ◽  
Porous Silicon Nanowire

Gas Transport and Response in Porous Silicon Sensors

2010 ◽  
Vol 1253 ◽  
Author(s):  
Serdar Ozdemir ◽  
James L Gole
Keyword(s):  
Porous Silicon ◽  
Gas Sensors ◽  
Room Temperature ◽  
Electrochemical Etching ◽  
Knudsen Diffusion ◽  
Gas Diffusion ◽  
Silicon Sensors ◽  
Response And Recovery ◽  
Ppm Level ◽  
Microfabrication Techniques

AbstractNanopore covered microporous silicon conductometric gas sensors have been produced via electrochemical etching and standard microfabrication techniques. Reversible and sensitive gas sensors working at room temperature have been fabricated. Sensing of NH3, NOx and PH3 at or below the ppm level have been achieved. The porous silicon (PS) surface has been modified using selective coatings including electroless tin, gold, nickel and copper solutions to increase the response to NOx, NH3, and PH3 respectively. The diffusion of the analyte species has been investigated in the nanopore and micropore regimes by numerical analysis. Comparing the response time of the hybrid porous sensor surface with numerical diffusion calculations on the pores, it has been observed that Knudsen diffusion time scales dominate the sensor response. A transduction model is proposed based on nanopore limited gas diffusion and the experimental response and recovery data.

Porous Silicon Nanowire Arrays for Reversible Optical Gas Sensing

2017 ◽  
Vol 215 (1) ◽  
pp. 1700565 ◽  
Author(s):  
Veronika A. Georgobiani ◽  
Kirill A. Gonchar ◽  
Elena A. Zvereva ◽  
Liubov A. Osminkina
Keyword(s):  
Porous Silicon ◽  
Gas Sensing ◽  
Silicon Nanowire ◽  
Nanowire Arrays ◽  
Silicon Nanowire Arrays ◽  
Optical Gas Sensing ◽  
Porous Silicon Nanowire

MnOx-decorated carbonized porous silicon nanowire electrodes for high performance supercapacitors

2017 ◽  
Vol 10 (6) ◽  
pp. 1505-1516 ◽  
Author(s):  
Sinem Ortaboy ◽  
John P. Alper ◽  
Francesca Rossi ◽  
Giovanni Bertoni ◽  
Giancarlo Salviati ◽  
...  
Keyword(s):  
Porous Silicon ◽  
High Performance ◽  
Silicon Nanowire ◽  
Electrochemical Performances ◽  
Silicon Based ◽  
Porous Silicon Nanowire ◽  
Power Densities

The highest energy and power densities ever reported in silicon-based pseudo-capacitor electrodes are obtained showing excellent electrochemical performances.

scholarly journals Synthesis and Photoluminescence Properties of Porous Silicon Nanowire Arrays

2010 ◽  
Vol 5 (11) ◽  
pp. 1822-1828 ◽  
Author(s):  
Linhan Lin ◽  
Siping Guo ◽  
Xianzhong Sun ◽  
Jiayou Feng ◽  
Yan Wang
Keyword(s):  
Porous Silicon ◽  
Silicon Nanowire ◽  
Nanowire Arrays ◽  
Photoluminescence Properties ◽  
Silicon Nanowire Arrays ◽  
Porous Silicon Nanowire
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