Structure Evolution and Thermoelectric Properties of Carbonized Polydopamine Thin Films

Haoqi Li; Yaroslav V. Aulin; Laszlo Frazer; Eric Borguet; Rohit Kakodkar; Joseph Feser; Yan Chen; Ke An; Dmitriy A. Dikin; Fei Ren

doi:10.1021/acsami.6b15601

Structure Evolution and Thermoelectric Properties of Carbonized Polydopamine Thin Films

Haoqi Li, Yaroslav V. Aulin, Laszlo Frazer, Eric Borguet, Rohit Kakodkar, Joseph Feser, Yan Chen, Ke An, Dmitriy A. Dikin, Fei Ren

Materials Engineering

Research output: Contribution to journal › Article › peer-review

85 Scopus citations

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
Pages (from-to)	6655-6660
Number of pages	6
Journal	ACS Applied Materials and Interfaces
Volume	9
Issue number	8
DOIs	https://doi.org/10.1021/acsami.6b15601
State	Published - Mar 1 2017

Funding

F.R. acknowledges the financial support from Temple University faculty start-up fund. Research conducted at ORNL's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. Y.C. and K.A. thanks Drs. M. Feygenson and J. Neuefeind for their support of neutron experiments. The SEM imaging was performed in the CoE-NIC facility at Temple University which is based on DoD DURIP Award N0014-12-1-0777 from the Office of Naval Research and is sponsored by the College of Engineering. E.B. and Y.A. acknowledge support as part of the Center for the Computational Design of Functional Layered Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science Basic Energy Sciences, under Award DE-SC0012575. H.L. and F.R. thank Maryam Hajfathalian, Eric Menumerov, and Samantha Shumlas for their technical assistance.

Funders	Funder number
College of Engineering
Maryam Hajfathalian
Office of Basic Energy Sciences
Office of Science Basic Energy Sciences	DE-SC0012575
Scientific User Facilities Division
Office of Naval Research
U.S. Department of Energy	N0014-12-1-0777
Temple University

Keywords

Raman spectroscopy
neutron total scattering
polydopamine
seebeck coefficient
thermal conductivity
thermoelectric

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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.",

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AU - Li, Haoqi

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AU - Frazer, Laszlo

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AU - Kakodkar, Rohit

AU - Feser, Joseph

AU - Chen, Yan

AU - An, Ke

AU - Dikin, Dmitriy A.

AU - Ren, Fei

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AB - 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.

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Structure Evolution and Thermoelectric Properties of Carbonized Polydopamine Thin Films

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