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  Department of Electrical Engineering and Computer Science Theses Master

Electrode Geometry-Guided Optimization of Carbon Nanotube Alignment for Reproducible Fabrication of Single-Tube FET Biosensors

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dc.contributor.advisor 권혁준 -
dc.contributor.author Kim Eunui -
dc.date.accessioned 2026-01-23T11:02:37Z -
dc.date.available 2026-01-23T11:02:37Z -
dc.date.issued 2025 -
dc.identifier.uri https://scholar.dgist.ac.kr/handle/20.500.11750/59835 -
dc.identifier.uri http://dgist.dcollection.net/common/orgView/200000893438 -
dc.description Carbon nanotube (CNT), Inkjet Printing, Field Effect Transistor (FET), Biosensor -
dc.description.tableofcontents Abstract i
List of Contents ii
List of Tables iii
List of Figures vi

Ⅰ. Introduction 1
1.1 Motivation 1
Ⅱ. Experimental Methods 5
2.1 Fabrication Process 5
2.1.1 Device Structure and Fabrication 5
2.1.2 CNT Ink Formulation 7
2.1.3 Inkjet Printing Process 8
2.2 Characterization 9
2.2.1 SEM Imaging of CNT Bridging Behavior 9
2.2.2 Time-Lapse Imaging of the CNT Ink Fluidic Behavior 9
2.2.3 Electrical Characterization of the CNTFETs 10
2.3 Application of CNTFETs as Biosensors 11
2.3.1 Microfluidic Measurement Setup for Liquid Gating 11
2.3.2 Functionalization of CNTFETs with Molecular Beacons 12
2.3.3 Detection of BRAF V600E DNA 14
2.3.4 Data Analysis of RTN Signals for Biosensing 16
Ⅲ. Results and Discussion 17
3.1 Control of CNT Alignment via S/D Electrode Edge Geometry 17
3.1.1 CNT Alignment Between Conventional and Modified Electrode Patterns 17
3.1.2 Design of Six Electrode Edge Geometries and Their Characteristics 20
3.1.3 Ink Dynamics and Yield Analysis 23
3.2 Electrical Characterization of Fabricated Single-CNTFETs 32
3.2.1 Back-Gated Transfer and Output Characteristics 32
3.2.2 Electrolyte-Gated Transfer and Output Characteristics 35
3.3 Biosensing Performance Using Molecular Beacon Functionalization 38
3.3.1 Device Functionalization 38
3.3.2 Probe Design and Target Selection for Biosensing Demonstration 41
3.3.3 Observation of RTN Signals of Molecular Beacons 44
3.3.4 Observation of RTN Signals of Target BRAF DNA Hybridization 47
Ⅳ. Conclusion 50
4.1 Summary 50
References 52
요약문 54		 -
dc.format.extent 54 -
dc.language eng -
dc.publisher DGIST -
dc.title Electrode Geometry-Guided Optimization of Carbon Nanotube Alignment for Reproducible Fabrication of Single-Tube FET Biosensors -
dc.title.alternative FET 바이오센서용 S/D 전극 구조를 이용한 전단력 기반 탄소나노튜브 정렬 최적화 -
dc.type Thesis -
dc.identifier.doi 10.22677/THESIS.200000893438 -
dc.description.degree Master -
dc.contributor.department Department of Electrical Engineering and Computer Science -
dc.contributor.coadvisor Hongki Kang -
dc.date.awarded 2025-08-01 -
dc.publisher.location Daegu -
dc.description.database dCollection -
dc.citation XT.IM 김67 202508 -
dc.date.accepted 2025-07-21 -
dc.contributor.alternativeDepartment 전기전자컴퓨터공학과 -
dc.subject.keyword Carbon nanotube (CNT), Inkjet Printing, Field Effect Transistor (FET), Biosensor -
dc.contributor.affiliatedAuthor Kim Eunui -
dc.contributor.affiliatedAuthor Hyuk-Jun Kwon -
dc.contributor.affiliatedAuthor Hongki Kang -
dc.contributor.alternativeName 김은의 -
dc.contributor.alternativeName Hyuk-Jun Kwon -
dc.contributor.alternativeName 강홍기 -
dc.rights.embargoReleaseDate 2027-08-31 -
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