Fabrication of flexible composite of laser reduced graphene@Ag dendrites as active material for surface enhanced Raman spectroscopy

2020 ◽  
Vol 277 ◽  
pp. 128380
Author(s):  
Eider Aparicio-Martínez ◽  
Iván A. Estrada-Moreno ◽  
Rocio B. Dominguez
Keyword(s):  
Raman Spectroscopy ◽  
Active Material ◽  
Surface Enhanced Raman Spectroscopy ◽  
Reduced Graphene ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Synthesis of bifunctional reduced graphene oxide/CuS/Au composite nanosheets for in situ monitoring of a peroxidase-like catalytic reaction by surface-enhanced Raman spectroscopy

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 54456-54462 ◽  
Author(s):  
Wei Song ◽  
Guangdi Nie ◽  
Wei Ji ◽  
Yanzhou Jiang ◽  
Xiaofeng Lu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Catalytic Reaction ◽  
Surface Enhanced Raman Spectroscopy ◽  
In Situ Monitoring ◽  
Reduced Graphene ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

In this work, we have demonstrated the synthesis of bifunctional reduced graphene oxide/CuS/Au composite nanosheets for in situ monitoring of peroxidase-like catalytic reaction by surface-enhanced Raman spectroscopy.

Hybrid films of reduced graphene oxide modified with gold nanorods and its study as surface-enhanced Raman spectroscopy platform

2020 ◽  
Vol 265 ◽  
pp. 127405 ◽  
Author(s):  
P.B. Jimenez-Vara ◽  
J. Johny ◽  
I.C. Novoa-de Leon ◽  
C. Guerrero-Bermea ◽  
D.F. Garcia-Gutierrez ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gold Nanorods ◽  
Surface Enhanced Raman Spectroscopy ◽  
Hybrid Films ◽  
Reduced Graphene ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Interfacial self-assembly of nanostructured silver octahedra for surface-enhanced Raman spectroscopy

2018 ◽  
Vol 11 (05) ◽  
pp. 1850028 ◽  
Author(s):  
Anna A. Semenova ◽  
Alexander E. Baranchikov ◽  
Vladimir K. Ivanov ◽  
Eugene A. Goodilin
Keyword(s):  
Raman Spectroscopy ◽  
Self Assembly ◽  
Hot Spots ◽  
Active Material ◽  
Surface Enhanced Raman Spectroscopy ◽  
Interfacial Region ◽  
Pickering Emulsions ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Scattering Signal

A novel robust and effective approach is suggested to form thin film substrates for surface-enhanced Raman spectroscopy (SERS) using interfacial self-assembly in demixing water/toluene Pickering emulsions collecting silver octahedral mesocages onto a finally flat interfacial region. The freely floating self-assembled silver films obtained after toluene evaporation can be transferred onto various substrates including those with an ordered superficial relief causing a further alignment of silver octahedra. A special porous aggregative structure of the octahedra mesocages provokes a great number of hot spots allowing a large amplification of Raman scattering signal of model dye analytes and molecular thiol products of crude oil desulfurization. The suggested method seems to be an easy scaling route for SERS active material production.

Bacterial detection and differentiation via direct volatile organic compound sensing with surface enhanced Raman spectroscopy

2017 ◽  
Author(s):  
Caitlin S. DeJong ◽  
David I. Wang ◽  
Aleksandr Polyakov ◽  
Anita Rogacs ◽  
Steven J. Simske ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Bacterial Infections ◽  
Direct Detection ◽  
Point Of Care ◽  
Surface Enhanced Raman Spectroscopy ◽  
E Coli ◽  
Recent Emergence ◽  
Surface Enhanced ◽  
Volatile Organic ◽  
Surface Enhanced Raman

Through the direct detection of bacterial volatile organic compounds (VOCs), via surface enhanced Raman spectroscopy (SERS), we report here a reconfigurable assay for the identification and monitoring of bacteria. We demonstrate differentiation between highly clinically relevant organisms: <i>Escherichia coli</i>, <i>Enterobacter cloacae</i>, and <i>Serratia marcescens</i>. This is the first differentiation of bacteria via SERS of bacterial VOC signatures. The assay also detected as few as 10 CFU/ml of <i>E. coli</i> in under 12 hrs, and detected <i>E. coli</i> from whole human blood and human urine in 16 hrs at clinically relevant concentrations of 10<sup>3</sup> CFU/ml and 10<sup>4</sup> CFU/ml, respectively. In addition, the recent emergence of portable Raman spectrometers uniquely allows SERS to bring VOC detection to point-of-care settings for diagnosing bacterial infections.

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