Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1525108 | Materials Chemistry and Physics | 2010 | 9 Pages |
Abstract
Bismuth sulfide quantum dots (ϕ ∼ 12 nm) with two-dimensional platelet morphology synthesized using a simple aqueous colloidal method exhibit directional growth along 〈2 1 1〉 direction. Impedance characteristics of this two-dimensional quantum structure yields a characteristic semi-circular profile due to a classical Voigt element in addition to a semi-circle like loop in the negative imaginary part of the impedance Nyquist plot. The apparent inductive reverse-loop impedance profile observed, a distinguishing feature of this study can be explained on the basis of an unusual negative resistor–capacitor combination, realized due to relaxation of surface states in this technologically important semiconductor–quantum structure.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
K.A.Z. Syed Abuthahir, R. Jagannathan,