@article{Porntip Wongkaew_Suta Poosittisak_2017, title={ATOMIC FORCE MICROSCOPIC AND ELECTROCHEMICAL CHARACTERIZATION OF THE MODIFIED SCREEN PRINTED CARBON ELECTRODE BY SELF ASSEMBLED DEPOSITION OF CHITOSAN AND ACTIVATED CARBON}, volume={11}, url={https://geomatejournal.com/geomate/article/view/2076}, abstractNote={<p>The surface topographic characteristics generated after a modification of screen printed carbon<br>electrode (SPCE) with either chitosan or activated carbon blending chitosan were closely investigated by atomic<br>force microscopy and a complementary electrochemical techniques. Eighty five percent deacetylation degree<br>chitosan was used at 1% in 1% acetic acid while the activated carbon blending ratio used was 1:1 in chitosan<br>solution. The modification was performed via self assembled deposition directly onto the working electrode<br>surface area. Growth feature of each modified surface was obviously differentiated by all roughness parameters<br>such as an average roughness, root mean square, height different, grain and fractal. The highest roughness value<br>with the least grain was from chitosan modified SPCE. A good correlation result was obtained with<br>electrochemical cyclic voltammetry that a great change in current response was also appeared. Both the modified<br>SPCE by chitosan and activated carbon blending chitosan could produce comparable higher current sensitivity<br>with up to around 0.5 slope value following by their regression coefficient of 0.99. Thus affordable and efficient<br>platforms for a fabrication of desirable pesticide biosensor could be achieved with these modifications as<br>expected.</p>}, number={24}, journal={GEOMATE Journal}, author={Porntip Wongkaew and Suta Poosittisak}, year={2017}, month={Apr.}, pages={2356–2362} }