In-situ FT-IR studies of porous silicon surface reactions

1995 ◽  
Vol 349 ◽  
pp. 109-112 ◽  
Author(s):  
R. Dietrich ◽  
J. Grobe ◽  
H. Feld
Keyword(s):  
Porous Silicon ◽  
Silicon Surface ◽  
Surface Reactions ◽  
Porous Silicon Surface ◽  
Ir Studies ◽  
Ft Ir

Angular Ellipsometry of Porous Silicon Surface Layers

2020 ◽  
Vol 12 (3) ◽  
pp. 03024-1-03024-4
Author(s):  
L. V. Poperenko ◽  
◽  
S. G. Rozouvan ◽  
I. V. Yurgelevych ◽  
P. O. Lishchuk ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Silicon Surface ◽  
Surface Layers ◽  
Porous Silicon Surface

Effects of ultra-high pressures (>3.6 GPa) on the electrical resistance of polyaniline by in situ FT-IR studies

1997 ◽  
Vol 280 (5-6) ◽  
pp. 469-474 ◽  
Author(s):  
Xing-Rong Zeng ◽  
Ke-Cheng Gong ◽  
Ke-Nan Weng ◽  
Wan-Sheng Xiao ◽  
Wen-Hong Gan ◽  
...  
Keyword(s):  
Electrical Resistance ◽  
High Pressures ◽  
Ir Studies ◽  
Ft Ir

scholarly journals Porous Silicon Structural Evolution from In-Situ Luminescence and Raman Measurements

1996 ◽  
Vol 431 ◽  
Author(s):  
D. R. Tallant ◽  
M. J. Kelly ◽  
T. R. Guilinger ◽  
R. L. Simpson
Keyword(s):  
Porous Silicon ◽  
Silicon Surface ◽  
Structural Evolution ◽  
Surface Oxidation ◽  
Ethanol Solution ◽  
Nonradiative Recombination ◽  
Photoluminescence Intensity ◽  
Exciton Migration ◽  
Photoluminescence Mechanism

AbstractWe performed in-situ photoluminescence and Raman measurements on an anodized silicon surface in the HF/ethanol solution used for anodization. The porous silicon thereby produced, while resident in HF/ethanol, does not immediately exhibit intense photoluminescence. Intense photoluminescence develops spontaneously in HF/ethanol after 18–24 hours or with replacement of the HF/ethanol with water. These results support a quantum confinement mechanism in which exciton migration to traps and nonradiative recombination dominates the de-excitation pathways until silicon nanocrystals are physically separated and energetically decoupled by hydrofluoric acid etching or surface oxidation. The porous silicon surface, as produced by anodization, shows large differences in photoluminescence intensity and peak wavelength over millimeter distances. Parallel Raman measurements implicate nanometer-size silicon particles in the photoluminescence mechanism.

Chemical Modification of the Porous Silicon Surface

1994 ◽  
Vol 358 ◽  
Author(s):  
Eric J. Lee ◽  
James S. Ha ◽  
Michael J. Sailor
Keyword(s):  
Porous Silicon ◽  
Chemical Modification ◽  
Formic Acid ◽  
Gas Phase ◽  
Silicon Surface ◽  
Chemical Vapor ◽  
Luminescence Quenching ◽  
Porous Silicon Surface ◽  
Phase Water ◽  
Surface Modified

ABSTRACTThe porous silicon (PS) surface is derivatized with ethanol, triethylsilanol and formic acid as well as oxidized with water. The two reactions used to prepare these surfaces are discussed, and FTIR spectra of the products are presented. Surface-modified PS retains 10-40% of its original photoluminescence. PS-derivatives display reversible luminescence quenching by gas phase water, ethanol, acetonitrile and benzene. The extent of quenching varies with different PS-derivatives depending on the interaction of the chemical vapor with the modified PS surfaces.

Room‐temperature backbond oxidation of the porous silicon surface by oxygen radical irradiation

1995 ◽  
Vol 66 (7) ◽  
pp. 836-838 ◽  
Author(s):  
Patrick O’Keeffe ◽  
Yoshinobu Aoyagi ◽  
Shuji Komuro ◽  
Takashi Kato ◽  
Takitaro Morikawa
Keyword(s):  
Porous Silicon ◽  
Silicon Surface ◽  
Room Temperature ◽  
Oxygen Radical ◽  
Porous Silicon Surface

Grafting of functionalized polymer on porous silicon surface using Grignard reagent

2017 ◽  
Vol 421 ◽  
pp. 82-88 ◽  
Author(s):  
F-Z. Tighilt ◽  
S. Belhousse ◽  
S. Sam ◽  
K. Hamdani ◽  
K. Lasmi ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Silicon Surface ◽  
Grignard Reagent ◽  
Porous Silicon Surface

In Situ FT-IR Studies on Catalytic Nature of Iron Nitride: Identification of the N Active Site

ChemCatChem ◽  
2012 ◽  
Vol 4 (5) ◽  
pp. 624-627 ◽  
Author(s):  
Li Wang ◽  
Qin Xin ◽  
Yue Zhao ◽  
Ge Zhang ◽  
Jie Dong ◽  
...  
Keyword(s):  
Active Site ◽  
Iron Nitride ◽  
Ir Studies ◽  
Ft Ir
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