A disposable gold-cellulose nanofibril platform for SERS mapping

2020 ◽  
Vol 12 (24) ◽  
pp. 3164-3172
Author(s):  
Saliha Nur Tanis ◽  
Hasan Ilhan ◽  
Burcu Guven ◽  
Emine Kubra Tayyarcan ◽  
Hakan Ciftci ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Raman Scattering ◽  
Gold Nanoparticle ◽  
Surface Enhanced Raman Scattering ◽  
Cellulose Nanofibril ◽  
E Coli ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Rapid Enumeration ◽  
Enhanced Raman Scattering

In this study, we present a disposable and inexpensive paper-like gold nanoparticle-embedded cellulose nanofibril substrate for the rapid enumeration of Escherichia coli (E. coli) using surface-enhanced Raman scattering (SERS) mapping.

Characterization of Thermophilic Bacteria Using Surface-Enhanced Raman Scattering

2008 ◽  
Vol 62 (11) ◽  
pp. 1226-1232 ◽  
Author(s):  
Mustafa Çulha ◽  
Ahmet Adigüzel ◽  
M. MÜGE Yazici ◽  
Mehmet Kahraman ◽  
Fikrettin Slahin ◽  
...  
Keyword(s):  
Cell Wall ◽  
Raman Scattering ◽  
Elevated Temperatures ◽  
Thermophilic Bacteria ◽  
Surface Enhanced Raman Scattering ◽  
Molecular Structures ◽  
E Coli ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Surface-enhanced Raman scattering (SERS) can provide molecular-level information about the molecules and molecular structures in the vicinity of nanostructured noble metal surfaces such as gold and silver. The three thermophilic bacteria Bacillus licheniformis, Geobacillus stearothermophilus, and Geobacillus pallidus, a Gram-negative bacterium E. coli, and a Gram-positive bacterium B. megaterium are comparatively characterized using SERS. The SERS spectra of thermophilic bacteria are similar, while they show significant differences compared to E. coli and B. megaterium. The findings indicate that a higher number of thiol residues and possible S–S bridges are present in the cell wall structure of thermophilic bacteria, providing their stability at elevated temperatures. Incubating the thermophilic bacteria with colloidal silver suspension at longer times improved the bacteria–silver nanoparticle interaction kinetics, while increased temperature does not have a pronounced effect on spectral features. A tentative assignment of the SERS bands was attempted for thermophilic bacteria. The results indicate that SERS can be a useful tool to study bacterial cell wall molecular differences.

Polarization Dependence of Surface-Enhanced Raman Scattering in Gold Nanoparticle−Nanowire Systems

Nano Letters ◽  
2008 ◽  
Vol 8 (8) ◽  
pp. 2497-2502 ◽  
Author(s):  
Hong Wei ◽  
Feng Hao ◽  
Yingzhou Huang ◽  
Wenzhong Wang ◽  
Peter Nordlander ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Gold Nanoparticle ◽  
Surface Enhanced Raman Scattering ◽  
Polarization Dependence ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering
Sign in / Sign up

Export Citation Format

Share Document