title: Structure Evolution and Thermoelectric Properties of Carbonized Polydopamine Thin Films.
abstract: Carbonization of nature-inspired polydopamine can yield thin films with high electrical conductivity. Understanding of the structure of carbonized PDA (cPDA) is therefore highly desired. In this study, neutron diffraction, Raman spectroscopy, and other techniques indicate that cPDA samples are mainly amorphous with some short-range ordering and graphite-like structure that emerges with increasing heat treatment temperature. The electrical conductivity and the Seebeck coefficient show different trends with heat treatment temperature, while the thermal conductivity remains insensitive. The largest room-temperature ZT of 2 × 10-4was obtained on samples heat-treated at 800 °C, which is higher than that of reduced graphene oxide.
authors.forename: Haoqi
authors.identifier: http://orcid.org/0000-0002-9943-329X
authors.initials: H
authors.lastname: Li
authors.forename: Yaroslav V
authors.initials: YV
authors.lastname: Aulin
authors.forename: Laszlo
authors.initials: L
authors.lastname: Frazer
authors.forename: Eric
authors.initials: E
authors.lastname: Borguet
authors.affiliation: Department of Mechanical Engineering, University of Delaware , Newark, Delaware 19716, United States.
authors.forename: Rohit
authors.initials: R
authors.lastname: Kakodkar
authors.affiliation: Department of Mechanical Engineering, University of Delaware , Newark, Delaware 19716, United States.
authors.forename: Joseph
authors.initials: J
authors.lastname: Feser
authors.affiliation: Chemical and Engineering Materials Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.
authors.forename: Yan
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Chemical and Engineering Materials Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.
authors.forename: Ke
authors.initials: K
authors.lastname: An
authors.forename: Dmitriy A
authors.initials: DA
authors.lastname: Dikin
authors.forename: Fei
authors.initials: F
authors.lastname: Ren
keywords: Raman spectroscopy; neutron total scattering; polydopamine; seebeck coefficient; thermal conductivity; thermoelectric