Surface-Enhanced Raman Spectroscopy of CrO3/H2SO4-Etched Polyethylene Films

1989 ◽  
Vol 43 (2) ◽  
pp. 226-229 ◽  
Author(s):  
Lorraine M. Siperko
Keyword(s):  
Raman Spectroscopy ◽  
Sulfuric Acid ◽  
Functional Groups ◽  
Surface Enhanced Raman Spectroscopy ◽  
Polymer Chemistry ◽  
Polyethylene Films ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sulfate Species ◽  
Thin Polyethylene

The effects of chromic/sulfuric acid etchant on thin polyethylene films are being studied by Raman spectroscopy. The functional groups on the surface of the etched films were found to differ from those present in the bulk. Cr-O bands appeared in both the bulk and SERS spectra, and sulfate species were detected on the surface only. The ability to differentiate between the surface and bulk polymer chemistry of CrO3/H2SO4-etched polyethylene using surface-enhanced Raman spectroscopy is demonstrated.

scholarly journals Vibrational spectroscopy of metal carbonyls for bio-imaging and -sensing

The Analyst ◽  
2016 ◽  
Vol 141 (5) ◽  
pp. 1569-1586 ◽  
Author(s):  
Zhiyong Lam ◽  
Kien Voon Kong ◽  
Malini Olivo ◽  
Weng Kee Leong
Keyword(s):  
Raman Spectroscopy ◽  
Transition Metal ◽  
Functional Groups ◽  
Vibrational Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Metal Carbonyls ◽  
Surface Enhanced ◽  
Transition Metal Carbonyls ◽  
Surface Enhanced Raman ◽  
Bio Imaging

Transition metal carbonyls exhibit strong CO absorptions in the 2200–1800 cm−1 region, which is free of interference from other functional groups. This feature has led to their applications in bio-imaging and -sensing, in particular through mid-IR, Raman and more recently, surface-enhanced Raman spectroscopy (SERS).

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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