Adsorptive Stripping Voltammetric Detection of Tea Polyphenols at Multiwalled Carbon Nanotubes-Chitosan Composite Electrode

2009 ◽  
Vol 21 (6) ◽  
pp. 762-766 ◽  
Author(s):  
Deyin Guo ◽  
Dan Zheng ◽  
Guangquan Mo ◽  
Jianshan Ye
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Composite Electrode ◽  
Tea Polyphenols ◽  
Multiwalled Carbon ◽  
Voltammetric Detection ◽  
Chitosan Composite

Fabrication of high-performance composite electrodes composed of multiwalled carbon nanotubes and glycerol-doped poly(3,4-ethylenedioxythiophene):polystyrene sulfonate for use in organic devices

2015 ◽  
Vol 3 (28) ◽  
pp. 7325-7335 ◽  
Author(s):  
Dong-Jin Yun ◽  
Yong Jin Jeong ◽  
Hyemin Ra ◽  
Jung-Min Kim ◽  
Tae Kyu An ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
High Performance ◽  
Composite Electrode ◽  
Composite Electrodes ◽  
Polystyrene Sulfonate ◽  
Multiwalled Carbon ◽  
High Performance Composite ◽  
Organic Devices

The organic doping facilitates the high performance of MWCNT/PEDOT:PSS composite electrode in organic devices.

scholarly journals Multiwalled Carbon Nanotubes and the Electrocatalytic Activity of Gluconobacter oxydans as the Basis of a Biosensor

Biosensors ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 137 ◽  
Author(s):  
Plekhanova ◽  
Tarasov ◽  
Bykov ◽  
Prisyazhnaya ◽  
Kolesov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Structural Integrity ◽  
Respiratory Activity ◽  
Gluconobacter Oxydans ◽  
Multiwalled Carbon ◽  
Chitosan Composite ◽  
Total Impedance ◽  
Positive Results ◽  
Sensitivity Increase

This paper considers the effect of multiwalled carbon nanotubes (MWCNTs) on the parameters of Gluconobacter oxydans microbial biosensors. MWCNTs were shown not to affect the structural integrity of microbial cells and their respiratory activity. The positive results from using MWCNTs were due to a decrease in the impedance of the electrode. The total impedance of the system decreased significantly, from 9000 kOhm (G. oxydans/chitosan composite) to 600 kOhm (G. oxydans/MWCNTs/chitosan). Modification of the amperometric biosensor with nanotubes led to an increase in the maximal signal from 65 to 869 nA for glucose and from 181 to 1048 nA for ethanol. The biosensor sensitivity also increased 4- and 5-fold, respectively, for each of the substrates. However, the addition of MWCNTs reduced the affinity of respiratory chain enzymes to their substrates (both sugars and alcohols). Moreover, the minimal detection limits were not reduced despite a sensitivity increase. The use of MWCNTs thus improved only some microbial biosensor parameters.

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