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 × 10-4 was obtained on samples heat-treated at 800 °C, which is higher than that of reduced graphene oxide.
Original language | English |
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Pages (from-to) | 6655-6660 |
Number of pages | 6 |
Journal | ACS Applied Materials & Interfaces |
Volume | 9 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1 Mar 2017 |
Externally published | Yes |
Keywords
- polydopamine
- thermoelectric
- neutron total scattering
- Raman spectroscopy
- thermal conductivity
- seebeck coefficient