Studies on surface preparation and smoothness of nanostructured Bi 2Te3-based alloys by electrochemical and mechanical methods

Hsien-Ping Feng; Bo Yu; Shuo Chen; Kimberlee Collins; Chao He; Z. F. Ren; Gang Chen

doi:10.1016/j.electacta.2010.12.008

Studies on surface preparation and smoothness of nanostructured Bi ₂Te₃-based alloys by electrochemical and mechanical methods

Hsien-Ping Feng, Bo Yu, Shuo Chen, Kimberlee Collins, Chao He, Z. F. Ren, Gang Chen

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

27 Citations (Scopus)

Abstract

Significant improvements in the dimensionless thermoelectric figure-of-merit (ZT) for nanostructured bismuth telluride, Bi₂Te ₃, and its alloys have been demonstrated. In designing high-performance thermoelectric devices, variations in the thermal and electrical contact resistances due to interfacial effects between the nanostructured alloy and the metallic electrodes remain a significant issue. Smooth scratch-free surfaces should provide a baseline for contact resistance studies. In this paper, the root mean square roughness over a 10 μm ² of nanostructured bismuth tellurium based alloys was reduced from 133 nm to 1.9 nm by a procedure consisting of electrolysis, mechanical polishing, and chemical mechanical polishing (CMP). Post-CMP cleaning was also developed to yield a wettable surface for the subsequent conformable metallization. © 2010 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	3079-3084
Journal	Electrochimica Acta
Volume	56
Issue number	8
DOIs	https://doi.org/10.1016/j.electacta.2010.12.008
Publication status	Published - 1 Mar 2011
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Bismuth telluride based alloys
Chemical mechanical polishing
Electrolysis
Nanostructures
Thermoelectrics

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title = "Studies on surface preparation and smoothness of nanostructured Bi 2Te3-based alloys by electrochemical and mechanical methods",

abstract = "Significant improvements in the dimensionless thermoelectric figure-of-merit (ZT) for nanostructured bismuth telluride, Bi2Te 3, and its alloys have been demonstrated. In designing high-performance thermoelectric devices, variations in the thermal and electrical contact resistances due to interfacial effects between the nanostructured alloy and the metallic electrodes remain a significant issue. Smooth scratch-free surfaces should provide a baseline for contact resistance studies. In this paper, the root mean square roughness over a 10 μm 2 of nanostructured bismuth tellurium based alloys was reduced from 133 nm to 1.9 nm by a procedure consisting of electrolysis, mechanical polishing, and chemical mechanical polishing (CMP). Post-CMP cleaning was also developed to yield a wettable surface for the subsequent conformable metallization. {\textcopyright} 2010 Elsevier Ltd. All rights reserved.",

keywords = "Bismuth telluride based alloys, Chemical mechanical polishing, Electrolysis, Nanostructures, Thermoelectrics",

author = "Hsien-Ping Feng and Bo Yu and Shuo Chen and Kimberlee Collins and Chao He and Ren, {Z. F.} and Gang Chen",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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TY - JOUR

T1 - Studies on surface preparation and smoothness of nanostructured Bi 2Te3-based alloys by electrochemical and mechanical methods

AU - Feng, Hsien-Ping

AU - Yu, Bo

AU - Chen, Shuo

AU - Collins, Kimberlee

AU - He, Chao

AU - Ren, Z. F.

AU - Chen, Gang

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2011/3/1

Y1 - 2011/3/1

N2 - Significant improvements in the dimensionless thermoelectric figure-of-merit (ZT) for nanostructured bismuth telluride, Bi2Te 3, and its alloys have been demonstrated. In designing high-performance thermoelectric devices, variations in the thermal and electrical contact resistances due to interfacial effects between the nanostructured alloy and the metallic electrodes remain a significant issue. Smooth scratch-free surfaces should provide a baseline for contact resistance studies. In this paper, the root mean square roughness over a 10 μm 2 of nanostructured bismuth tellurium based alloys was reduced from 133 nm to 1.9 nm by a procedure consisting of electrolysis, mechanical polishing, and chemical mechanical polishing (CMP). Post-CMP cleaning was also developed to yield a wettable surface for the subsequent conformable metallization. © 2010 Elsevier Ltd. All rights reserved.

AB - Significant improvements in the dimensionless thermoelectric figure-of-merit (ZT) for nanostructured bismuth telluride, Bi2Te 3, and its alloys have been demonstrated. In designing high-performance thermoelectric devices, variations in the thermal and electrical contact resistances due to interfacial effects between the nanostructured alloy and the metallic electrodes remain a significant issue. Smooth scratch-free surfaces should provide a baseline for contact resistance studies. In this paper, the root mean square roughness over a 10 μm 2 of nanostructured bismuth tellurium based alloys was reduced from 133 nm to 1.9 nm by a procedure consisting of electrolysis, mechanical polishing, and chemical mechanical polishing (CMP). Post-CMP cleaning was also developed to yield a wettable surface for the subsequent conformable metallization. © 2010 Elsevier Ltd. All rights reserved.

KW - Bismuth telluride based alloys

KW - Chemical mechanical polishing

KW - Electrolysis

KW - Nanostructures

KW - Thermoelectrics

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U2 - 10.1016/j.electacta.2010.12.008

DO - 10.1016/j.electacta.2010.12.008

M3 - RGC 21 - Publication in refereed journal

SN - 0013-4686

VL - 56

SP - 3079

EP - 3084

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 8

ER -