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Electrochemical Fabrication of Nanostructures on Porous Silicon for Biochemical Sensing Platforms

Title
Electrochemical Fabrication of Nanostructures on Porous Silicon for Biochemical Sensing Platforms
Author
주재범
Keywords
Porous silicon; electrochemical deposition; nanoparticles; electrochemical sensor; SERS substrate
Issue Date
2016-09
Publisher
JAPAN SOC ANALYTICAL CHEMISTRY
Citation
ANALYTICAL SCIENCES, v. 32, NO. 6, Page. 681-686
Abstract
We present a method for the electrochemical patterning of gold nanoparticles (AuNPs) or silver nanoparticles (AgNPs) on porous silicon, and explore their applications in: (1) the quantitative analysis of hydroxylamine as a chemical sensing electrode and (2) as a highly sensitive surface-enhanced Raman spectroscopy (SERS) substrate for Rhodamine 6G. For hydroxylamine detection, AuNPs-porous silicon can enhance the electrochemical oxidation of hydroxylamine The current changed linearly for concentrations ranging from 100 mu M to 1.32 mM (R-2 = 0.995), and the detection limit was determined to be as low as 55 mu M. When used as SERS substrates, these materials also showed that nanoparticles decorated on porous silicon substrates have more SERS hot spots than those decorated on crystalline silicon substrates, resulting in a larger SERS signal. Moreover, AgNPs-porous silicon provided five-times higher signal compared to AuNPs-porous silicon. From these results, we expect that nanoparticles decorated on porous silicon substrates can be used in various types of biochemical sensing platforms.
URI
https://www.jstage.jst.go.jp/article/analsci/32/6/32_681/_articlehttp://repository.hanyang.ac.kr/handle/20.500.11754/80496
ISSN
0910-6340; 1348-2246
DOI
10.2116/analsci.32.681
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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