title: Transformation of unipolar single-walled carbon nanotube field effect transistors to ambipolar induced by polystyrene nanosphere assembly.
abstract: We have fabricated single-walled carbon nanotube (SWNT) field effect transistors (FETs) with molybdenum source and drain contacts. Normally, these devices operate only as p-channel transistors, however, after polystyrene latex nanospheres were attached to the nanotubes close to the contacts, they changed to ambipolar operation. This strategy provides a simple method to modify the electrical behavior of unipolar SWNT-FETs by influencing the gate-channel electric field distribution and offset charge, so enabling complementary circuits to be fabricated.
authors.affiliation: Electrical Engineering Division, Engineering Department, University of Cambridge, 9 JJ Thomson Avenue, Cambridge, U.K.
authors.forename: Di
authors.initials: D
authors.lastname: Wei
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: David G
authors.initials: DG
authors.lastname: Hasko
authors.forename: DaPing
authors.initials: D
authors.lastname: Chu
authors.forename: Ken B K
authors.initials: KB
authors.lastname: Teo
authors.forename: Gehan A J
authors.initials: GA
authors.lastname: Amaratunga
authors.forename: William I
authors.initials: WI
authors.lastname: Milne
mesh_terms: D054118:Nanospheres / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D014173:Transistors, Electronic
chemical_list: D037742:Nanotubes, Carbon; D011137:Polystyrenes; C024075:styrofoam