title: Field-effect transistors based on thermally treated electron beam-induced carbonaceous patterns.
abstract: Electron beam-induced carbonaceous deposition (EBICD) derived from residual hydrocarbons in the vacuum chamber has many fascinating properties. It is known to be chemically complex but robust, structurally amorphous, and electrically insulating. The present study is an attempt to gain more insight into its chemical and electrical nature based on detailed measurements such as Raman, XPS, TEM, and electrical. Interestingly, EBIC patterns are found to be blue fluorescent when excited with UV radiation, a property which owes much to sp(2) carbon clusters amidst sp(3) matrix. Temperature-dependent Raman and electrical measurements have confirmed the graphitization of the EBICD through the decomposition of functional groups above 300 °C. Finally, graphitized EBIC patterns have been employed as active p-type channel material in the field-effect transistors to obtain mobilities in the range of 0.2-4 cm(2)/V s.
authors.affiliation: Chemistry & Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur PO, Bangalore 560 064, India.
authors.forename: Narendra
authors.initials: N
authors.lastname: Kurra
authors.forename: Venkata Srinu
authors.initials: VS
authors.lastname: Bhadram
authors.forename: Chandrabhas
authors.initials: C
authors.lastname: Narayana
authors.forename: G U
authors.initials: GU
authors.lastname: Kulkarni