Hybrid Gold–Conductive Metal Oxide Films for Attenuated Total Reflectance Surface Enhanced Infrared Absorption Spectroscopy

2019 ◽  
Vol 2 (3) ◽  
pp. 1274-1284 ◽  
Author(s):  
Ian R. Andvaag ◽  
Tyler A. Morhart ◽  
Osai J. R. Clarke ◽  
Ian J. Burgess
Keyword(s):  
Metal Oxide ◽  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Oxide Films ◽  
Attenuated Total Reflectance ◽  
Infrared Absorption Spectroscopy ◽  
Metal Oxide Films ◽  
Total Reflectance ◽  
Surface Enhanced

scholarly journals EXPRESS: Probing Heterogeneity in Attenuated Total Reflection Surface-Enhanced Infrared Absorption Spectroscopy (ATR SEIRAS) Response with Synchrotron Infrared Microspectroscopy

2021 ◽  
pp. 000370282110058
Author(s):  
Kaiyang Tu ◽  
Tyler Morhart ◽  
Stuart Read ◽  
Scott Rosendahl ◽  
Ian James Burgess
Keyword(s):  
Metal Oxide ◽  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Infrared Absorption Spectroscopy ◽  
Self Assembled Monolayer ◽  
Surface Enhanced ◽  
Metal Island ◽  
Ir Signature

The heterogeneity of metal island films electrodeposited on conductive metal oxide modified internal reflection elements is shown to provide a variable ATR-SEIRAS (attenuated total reflection surface enhanced infrared absorption spectroscopy) response. A self-assembled monolayer of a ferrocene-terminated thiol monolayer (FcC11SH) was formed on the gold islands covering a single substrate, which was measured using both a conventional spectrometer and a custom-built horizontal microscope. Cyclic voltammetry and ATR-SEIRAS results reveal that the FcC11SH modified substrate undergoes a reversible electron transfer and an associated re-orientation of both the ferrocene/ferrocenium headgroup and the hydrocarbon backbone. The magnitude of the absorption signal arising from the redox changes in the monolayer, as well as the IR signature arising from the ingress/egress of the perchlorate counterions, is shown to depend significantly on the size of the infrared beam spot when using a conventional FTIR spectrometer. By performing equivalent measurements on a horizontal microscope, the primary cause of the differences in the signal level is found to be the hetereogeneity in the density of gold islands on the conductive metal oxide.

Surfactant-assisted electroless deposition of silver nanoparticles on Ge crystal for ultra-sensitive detection by surface-enhanced infrared absorption spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20390-20395 ◽  
Author(s):  
Gadupudi Purna Chandra Rao ◽  
Vairaperumal Tharmaraj ◽  
Jyisy Yang
Keyword(s):  
Silver Nanoparticles ◽  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Electroless Deposition ◽  
Sensitive Detection ◽  
Infrared Absorption Spectroscopy ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surfactant Assisted

Fabrication of highly sensitive substrates for SEIRA measurements via assistance of surfactant to electrolessly deposit silver nanoparticles on Ge crystal.

Rapid detection of SARS-CoV-2 viral nucleic acids based on surface enhanced infrared absorption spectroscopy

Nanoscale ◽  
2021 ◽  
Author(s):  
Zhiqi Yao ◽  
Qiongdi Zhang ◽  
Wenting Zhu ◽  
Massimiliano Galluzzi ◽  
Wenhua Zhou ◽  
...  
Keyword(s):  
Nucleic Acids ◽  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Rapid Detection ◽  
Infrared Absorption Spectroscopy ◽  
Genomic Segment ◽  
Surface Enhanced

A rapid and sensitive SEIRA-based method for SARS-CoV-2 detection is proposed and analyzed. The proposed method can effectively detect as low as 2.98 copies per μL (∼5 aM) SARS-CoV-2 viral genomic segment within 30 minutes.

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