Title

SynTheses of Cu@SnO2 Core@Shell Nanowires for Gas Sensing Application.

DGIST Authors

Goh, Hyeonjin ; Lee, Youngu ; Jeong, Soon Moon

Advisor

이윤구

Co-Advisor(s)

Soon Moon Jeong

Issued Date

2020

Awarded Date

2020-02

Citation

Hyeonjin Goh. (2020). SynTheses of Cu@SnO2 Core@Shell Nanowires for Gas Sensing Application. doi: 10.22677/Theses.200000281525

Type

Thesis

Description

Core@shell nanowires, electroless plating, Cu@SnO2 nanowires, solution-processability, room temperature gas sensor

Table Of Contents

Ⅰ. Introduction
1.1 Core@shell NWs 1
1.1.1 Core@shell NWs 1
1.1.2 Methods for synthesizing core@shell NWs 2
1.2 Material for gas sensing 3
1.2.1 Tin oxide(SnO2) for ammonia(NH3) gas sensing 3
1.2.2 Introduction of assistant materials for gas sensing 3
1.3 Brief explanation for research 4

Ⅱ. Theoretical Background
2.1 Copper nanowires (CuNWs) 5
2.1.1 SynTheses methods for CuNWs 5
2.1.2 Growth principle of CuNWs 7
2.1.3 Physical property control of CuNWs 10
2.1.4 Core@shell NWs 11
2.2 Methods for core@shell synTheses 13
2.2.1 Chemical vapor deposition (CVD) 13
2.2.2 Electrochemical deposition 15
2.2.3 Electroless solution-phase synTheses 17
2.3 Resistive gas sensors 19
2.3.1 Principles of gas sensing 20
2.3.2 Ammonia (NH3) gas sensors 21

Ⅲ. Experimental section
3.1 Chemicals and materials 24
3.2 SynTheses of CuNWs 24
3.3 SynTheses of Cu@SnO2 core@shell NWs 25
3.4 Fabrication of gas sensor and measurement 25
3.5 Characterization 26

Ⅳ. Results and Discussion
4.1 Cu@SnO2 core@shell NWs 27
4.1.1 SynTheses of Cu@SnO2 core@shell NWs 27
4.1.2 Control of shell thickness of Cu@SnO2 core@shell NWs 29
4.1.3 Analysis of crystallinity and composition 34
4.2 NH3 gas sensor based on Cu@SnO2 core@shell NWs 36
4.2.1 Fabrication of gas sensor based on Cu@SnO2 core@shell NWs 36
4.2.2 NH3 gas sensitivity of Cu@SnO2 core@shell NWs 38
4.2.3 Principle of enhanced NH3 gas sensitivity of Cu@SnO2 core@shell NWs 44

Ⅴ. Conclusion 46

References 47
Summary (in Korean) 52

URI

http://dgist.dcollection.net/common/orgView/200000281525
http://hdl.handle.net/20.500.11750/11999

DOI

10.22677/Theses.200000281525

Degree

Master

Department

Energy Science&Engineering

Publisher

DGIST

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