scholarly journals Molecularly Imprinted Sol-Gel for TNT Detection with Optical Micro-Ring Resonator Sensor Chips

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3909 ◽  
Author(s):  
Ludmila Eisner ◽  
Isabel Wilhelm ◽  
Günter Flachenecker ◽  
Jürgen Hürttlen ◽  
Wolfgang Schade
Keyword(s):  
Gas Phase ◽  
Ring Resonator ◽  
Sol Gel ◽  
False Alarms ◽  
Organic Substances ◽  
Molecularly Imprinted ◽  
Precise Analysis ◽  
Order Of Magnitude ◽  
Tnt Detection ◽  
Receptor Layer

A sensor for trinitrotoluene (TNT) detection was developed by using a combination of optical micro-ring technology and a receptor coating based on molecularly imprinted sol-gel layers. Two techniques for deposition of receptor layers were compared: Airbrush technology and electrospray ionization. A concentration of less than 5 ppb for TNT in the gas-phase, using electrospray deposition of the receptor layer, was detected. The cross-sensitivities to organic substances and further nitro-based explosives were compared. As a result, the sensitivity to TNT is about one order of magnitude higher in comparison to the explosives 2,4-dinitrotoluene (DNT) or 1,3-dinitrobenzene (DNB) and about four orders of magnitude higher than the organic substances phenol, ethanol, and acetone. The signal response of the sensor is fast, and the compact sensor design enables the deposition of different receptor layers on multiple optical micro-rings on one chip, which allows a more precise analysis and reduction of side effects and false alarms.

Selective detection of gas-phase TNT by integrated optical waveguide spectrometry using molecularly imprinted sol–gel sensing films

2007 ◽  
Vol 593 (1) ◽  
pp. 82-91 ◽  
Author(s):  
Natalie R. Walker ◽  
Matthew J. Linman ◽  
Margaret M. Timmers ◽  
Stacey L. Dean ◽  
Colleen M. Burkett ◽  
...  
Keyword(s):  
Gas Phase ◽  
Optical Waveguide ◽  
Sol Gel ◽  
Selective Detection ◽  
Molecularly Imprinted ◽  
Integrated Optical ◽  
Integrated Optical Waveguide

SPR Enhanced molecular imprinted sol–gel film: A promising tool for gas-phase TNT detection

2016 ◽  
Vol 162 ◽  
pp. 44-47 ◽  
Author(s):  
Gioia Della Giustina ◽  
Agnese Sonato ◽  
Enrico Gazzola ◽  
Gianluca Ruffato ◽  
Simone Brusa ◽  
...  
Keyword(s):  
Gas Phase ◽  
Sol Gel ◽  
Promising Tool ◽  
Gel Film ◽  
Tnt Detection

Controlled Release of Nafcillin Using Biocompatible “Dummy” Molecularly Imprinted Sol-Gel Nanospheres

2015 ◽  
Vol 15 (3) ◽  
pp. 262-270 ◽  
Author(s):  
T. Lopez ◽  
M.A. Francos ◽  
A. Gonzalez ◽  
M.E. Diaz-Garcia ◽  
R. Badia-Laino
Keyword(s):  
Controlled Release ◽  
Sol Gel ◽  
Molecularly Imprinted

scholarly journals A simple approach to prepare fluorescent molecularly imprinted nanoparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (13) ◽  
pp. 7732-7737
Author(s):  
Fenying Wang ◽  
Dan Wang ◽  
Tingting Wang ◽  
Yu Jin ◽  
Baoping Ling ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Sol Gel ◽  
Silica Sol ◽  
Simple Approach ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Low Toxicity ◽  
Good Biocompatibility ◽  
Molecularly Imprinted Nanoparticles

Fluorescent molecularly imprinted polymer (FMIP) gains great attention in many fields due to their low cost, good biocompatibility and low toxicity. Here, a high-performance FMIP was prepared based on the autocatalytic silica sol–gel reaction.

scholarly journals A Molecularly Imprinted Sol-Gel Electrochemical Sensor for Naloxone Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 631
Author(s):  
Narges Shaabani ◽  
Nora W. C. Chan ◽  
Abebaw B. Jemere
Keyword(s):  
Indium Tin Oxide ◽  
Sol Gel ◽  
Electrochemical Techniques ◽  
Electrochemical Determination ◽  
Multiwall Carbon Nanotube ◽  
Molecularly Imprinted ◽  
Gel Layer ◽  
Sensing Material ◽  
Relative Standard ◽  
Optimized Conditions

A molecularly imprinted sol-gel is reported for selective and sensitive electrochemical determination of the drug naloxone (NLX). The sensor was developed by combining molecular imprinting and sol-gel techniques and electrochemically grafting the sol solution onto a functionalized multiwall carbon nanotube modified indium-tin oxide (ITO) electrode. The sol-gel layer was obtained from acid catalyzed hydrolysis and condensation of a solution composed of triethoxyphenylsilane (TEPS) and tetraethoxysilane (TES). The fabrication, structure and properties of the sensing material were characterized via scanning electron microscopy, spectroscopy and electrochemical techniques. Parameters affecting the sensor’s performance were evaluated and optimized. A sensor fabricated under the optimized conditions responded linearly between 0.0 µM and 12 µM NLX, with a detection limit of 0.02 µM. The sensor also showed good run-to-run repeatability and batch-to-batch performance reproducibility with relative standard deviations (RSD) of 2.5–7.8% (n = 3) and 9.2% (n = 4), respectively. The developed sensor displayed excellent selectivity towards NLX compared to structurally similar compounds (codeine, fentanyl, naltrexone and noroxymorphone), and was successfully used to measure NLX in synthetic urine samples yielding recoveries greater than 88%.

Photocatalytic degradation of trichloroethylene in the gas phase over TiO2 sol-gel films: Analysis of products

Chemosphere ◽  
1998 ◽  
Vol 36 (3) ◽  
pp. 483-495 ◽  
Author(s):  
Jong-Soon Kim ◽  
Kiminori Itoh ◽  
Masayuki Murabayashi
Keyword(s):  
Photocatalytic Degradation ◽  
Gas Phase ◽  
Sol Gel ◽  
Tio2 Sol ◽  
Sol Gel Films

scholarly journals Molecularly imprinted sol-gel silica for solid phase extraction of phenobarbital

2008 ◽  
Vol 19 (6) ◽  
pp. 1136-1143 ◽  
Author(s):  
Eduardo J. Pilau ◽  
Raquel G. C. Silva ◽  
Isabel C. F. S. Jardim ◽  
Fabio Augusto
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Sol Gel ◽  
Phase Extraction ◽  
Molecularly Imprinted
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