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Enhancement of the Seebeck Coefficient in Stacked Bi 2 Se 3 Nanoplates by Energy Filtering
Author(s) -
Xu Haiming,
Chen Gang,
Jin Rencheng,
Chen Dahong,
Wang Yu,
Pei Jian,
Yan Chunshuang,
Zhang Yongqiang,
Qiu Zhuangzhuang
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201301601
Subject(s) - chemistry , ethylene glycol , seebeck coefficient , carboxymethyl cellulose , pulmonary surfactant , transmission electron microscopy , raman spectroscopy , scanning electron microscope , analytical chemistry (journal) , powder diffraction , microstructure , chemical engineering , nanotechnology , crystallography , materials science , organic chemistry , composite material , optics , sodium , thermal conductivity , biochemistry , physics , engineering
In this work, Bi 2 Se 3 stacking nanoplates composed of three (or five) thin nanosheets have been successfully fabricated in the presence of ethylene glycol (EG) and by applying sodium carboxymethyl cellulose (CMC) as surfactant. The microstructure and morphology of the obtained products were characterized by powder X‐ray diffraction, field‐emission scanning electron microscopy, transmission electron microscopy, selected‐area electron diffraction, and Raman spectroscopy techniques. We found that the power factor can be tuned by energy filtering. The maximum power factor of 179 μW m –1 K –2 can be obtained for the sample (CMC‐3) by using CMC3 (viscosity, 300–800 mPa s) as surfactant at 544 K, which is about 14 % higher than that of the sample prepared with no CMC as surfactant.