scholarly journals 3-D Fibrous Network of TiO2 Nanoparticles: Raman Sensor Development

2021 ◽  
Author(s):  
Dmitry Maznichenko
Keyword(s):  
Raman Spectroscopy ◽  
Tio2 Nanoparticles ◽  
Diclofenac Sodium ◽  
Surface Enhanced Raman Spectroscopy ◽  
Femtosecond Laser Irradiation ◽  
Biomolecular Detection ◽  
Fibrous Network ◽  
Nano Fiber ◽  
Surface Enhanced Raman ◽  
Raman Sensor

A 3-D nano-fiber particle network of TiO2 nanoparticles is synthesized by pulsed femtosecond laser irradiation of a pure Ti substrate. This study investigated the properties of the resulting nanostructure for chemical and biomolecular detection by Raman spectroscopy. Controlled tuning of surface roughness, porosity and depth of the 3-D network were found to directly influence Raman detection. The presented findings support a previously unrealized detection capacity by TiO2. Crystal violet was used to test the Surface-Enhanced Raman Spectroscopy (SERS) performance of the developed TiO2 sensor pads. The corresponding Raman enhancement factor was determined to be 1.3x106 which is directly comparable to commercial Ag and Au based Raman substrates. Bisphenol-A and diclofenac sodium salt were introduced into drinking water and tested with various sensor pads to develop a Raman detection map. The results suggest an affinity towards uniform TiO2 3-D nanofibrous networks.

scholarly journals 3-D Fibrous Network of TiO2 Nanoparticles: Raman Sensor Development

2021 ◽  
Author(s):  
Dmitry Maznichenko
Keyword(s):  
Raman Spectroscopy ◽  
Tio2 Nanoparticles ◽  
Diclofenac Sodium ◽  
Surface Enhanced Raman Spectroscopy ◽  
Femtosecond Laser Irradiation ◽  
Biomolecular Detection ◽  
Fibrous Network ◽  
Nano Fiber ◽  
Surface Enhanced Raman ◽  
Raman Sensor

A 3-D nano-fiber particle network of TiO2 nanoparticles is synthesized by pulsed femtosecond laser irradiation of a pure Ti substrate. This study investigated the properties of the resulting nanostructure for chemical and biomolecular detection by Raman spectroscopy. Controlled tuning of surface roughness, porosity and depth of the 3-D network were found to directly influence Raman detection. The presented findings support a previously unrealized detection capacity by TiO2. Crystal violet was used to test the Surface-Enhanced Raman Spectroscopy (SERS) performance of the developed TiO2 sensor pads. The corresponding Raman enhancement factor was determined to be 1.3x106 which is directly comparable to commercial Ag and Au based Raman substrates. Bisphenol-A and diclofenac sodium salt were introduced into drinking water and tested with various sensor pads to develop a Raman detection map. The results suggest an affinity towards uniform TiO2 3-D nanofibrous networks.

Adsorption study of 4-MBA on TiO2 nanoparticles by surface-enhanced Raman spectroscopy

2009 ◽  
Vol 40 (12) ◽  
pp. 2004-2008 ◽  
Author(s):  
Libin Yang ◽  
Xin Jiang ◽  
Weidong Ruan ◽  
Bing Zhao ◽  
Weiqing Xu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Tio2 Nanoparticles ◽  
Surface Enhanced Raman Spectroscopy ◽  
Adsorption Study ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

A nanoaggregate-on-mirror platform for molecular and biomolecular detection by surface-enhanced Raman spectroscopy

2015 ◽  
Vol 408 (2) ◽  
pp. 609-618 ◽  
Author(s):  
Gregory Q. Wallace ◽  
Mohammadali Tabatabaei ◽  
Mariachiara S. Zuin ◽  
Mark S. Workentin ◽  
François Lagugné-Labarthet
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Biomolecular Detection ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

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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