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Publication Metadata only Electrochemically functionalized single-walled carbon nanotubes for ultrasensitive detection of BTEX vapors(2021-07-15) Tapan Sarkar; Sira Srinives; University of California, Riverside; Mahidol University; Guru Gobind Singh Indraprastha UniversitySingle-walled carbon nanotubes (SWNTs) have been functionalized electrochemically with porphyrin and were employed as the channel to fabricate the chemical field-effect transistor. Tetraphenylporphyrin was chosen for functionalization purpose... response for all analytes starting from 1.25 ppm to 15 ppm of concentration. A sub-ppm limit of detection was also observed. The systematic study of field effect transistor (FET) measurements indicates that the sensing mechanism is dominatedPublication Metadata only Calixarene-functionalized single-walled carbon nanotubes for sensitive detection of volatile amines(2018-09-01) Tapan Sarkar; P. Muhamed Ashraf; Sira Srinives; Ashok Mulchandani; University of California, Riverside; Mahidol University; Guru Gobind Singh Indraprastha Universityand ∼0.4 ppm for NH3, TMA and DMA respectively. Further, the field effect transistor analyses indicated that the sensing mechanism of the SWCNT-calixarene hybrid is dominated by the electrostatic gating effect. The sensing capability of the hybrid at lowPublication Metadata only Effects of Synthesis and Processing on Optoelectronic Properties of Titanium Carbonitride MXene(2019-04-23) Kanit Hantanasirisakul; Mohamed Alhabeb; Alexey Lipatov; Kathleen Maleski; Babak Anasori; Pol Salles; Chanoknan Ieosakulrat; Pasit Pakawatpanurut; Alexander Sinitskii; Steven J. May; Yury Gogotsi; University of Nebraska–Lincoln; Drexel University; Mahidol Universityin ensemble transport measurements. When the intercalants are removed, Ti3CNTx exhibits its intrinsic metallic behavior in good agreement with Hall measurements and transport properties measured on single-flake field-effect transistor devices. The dependence... of the transition-metal layer and control of surface terminations. However, the impact of the C and N site composition on electronic transport has not been explored. In this study, the effects of synthesis methods on optoelectronic properties of 2D titanium