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Thermoelectric Properties of Nanowires with a Graphitic Shell
Author(s) -
Lee Jong Woon,
Lee Eun Kyung,
Kim Byung Sung,
Lee Jae Hyun,
Kim Hee Goo,
Jang Hyeon Sik,
Hwang Sung Woo,
Choi Byoung Lyong,
Whang Dongmok
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201403492
Subject(s) - nanowire , thermoelectric effect , thermoelectric materials , materials science , thermal conductivity , shell (structure) , nanotechnology , electrical resistivity and conductivity , phonon , condensed matter physics , composite material , physics , thermodynamics , quantum mechanics
A thermoelectric device that can generate electricity from waste heat can play an important role in a global energy solution. However, the strongly correlated thermoelectric properties have remained a major hurdle for the highly efficient conversion of thermoelectric energy. Herein, the electrical and thermal properties of Si and SiO 2 nanowires with few‐layer graphitic shells are demonstrated; these structures exhibit enhanced electrical properties but no increase in thermal conductivity. The main path of the phonons through the structures is the core nanowire, which has a large cross‐sectional area relative to that of the graphitic shell layer. However, the electrical conductivities of the nanowires with shell structures are high because of the good electrical conductivity of the graphitic shell, despite its small cross‐sectional area.