10-16 June 2018
Dalhousie University
America/Halifax timezone
Welcome to the 2018 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2018!

Structure and Properties of Exfoliated MoS2-Polyaniline Nanocomposites

12 Jun 2018, 15:30
15m
Dunn 101 (cap.82) (Dalhousie University)

Dunn 101 (cap.82)

Dalhousie University

Oral (Non-Student) / Orale (non-étudiant(e)) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) T4-4 Films, surfaces and composites (DCMMP) | Films, surfaces et composites (DPMCM)

Speaker

Dr Douglas Dahn (Department of Physics, U. Prince Edward Island)

Description

Molybdenum disulfide was produced in an exfoliated state by combining molybdic acid with an excess of thiourea at 500°C under nitrogen. Nanocomposites of the conducting polymer polyaniline (PANI) and exfoliated MoS2 were then synthesized. The nanocomposites with varying percentage by weight of exfoliated MoS2 were characterized using powder X-Ray diffraction, electrical conductivity measurements, Seebeck coefficient measurements, thermogravimetric analysis, scanning electron microscopy, and transmission electron microscopy. An intriguing result was seen in the conductivity data, where several of the nanocomposites containing relatively small percentages of exfoliated MoS2 yielded higher conductivity overall in comparison to a sample of pure PANI. The exfoliated MoS2 used in this work is highly disordered, and is expected to be predominantly the 2H polytype. This form of MoS2 has very low conductivity, thus the increased conductivity of the nanocomposite suggests that PANI is most likely stabilizing MoS2 in its 1T metallic form, which is higher in conductivity.

Primary authors

Ms Erin Lyle (Department of Chemistry, U. Prince Edward Island) Dr Douglas Dahn (Department of Physics, U. Prince Edward Island) Dr Rabin Bissessur (Department of Chemistry, U. Prince Edward Island)

Co-author

Mr Cody McAllister (Department of Chemistry, U. Prince Edward Island)

Presentation Materials