Title Page
Contents
요약 7
Abstract 8
Chapter 1. Introduction 11
Chapter 2. Background 13
2.1. Liquid Metal 13
2.1.1. EGaIn 14
2.2. Polydimethylsiloxane (PDMS) 14
2.3. Deoxyribonucleic Acid (DNA) Computing 15
2.3.1. DNA 15
2.3.2. DNA Computing 15
Chapter 3. Experimental Section 20
3.1. Fabrication 20
3.1.1. Fabrication of Liquid Metal Transparent Conducting Electrode 20
3.1.2. Fabrication of Liquid Metal chip with 3D printing 21
3.2. Measurement 22
Chapter 4. Liquid Metal Transparent Conducting Electrode 24
4.1. Result & Discussion 24
4.1.1. The Fabrication of Liquid metal chip 24
4.1.2. The Grid pattern of LMTCE 25
4.1.3. Electrical and optical property of LMTCE 26
4.1.4. Application 1 (Touch Sensor) 28
4.1.5. Application 2 (Joule Heater) 28
Chapter 5. Liquid Metal chip for DNA droplet control 42
5.1. Result and Discussion 42
5.1.1. Fabrication of the DNA droplet control system 42
5.1.2. Droplet control 42
5.1.3. Capturing DNA using the DNA polarity 43
5.1.4. Future work for DNA Multi-Processing Unit 43
Conclusion 49
References 50
Table 2.1. Properties of EGaIn 17
Table 4.1. Resistances of each LMTCEs 35
Table 4.2. Sheet resistances and FoMs of each LMTCEs 36
Figure 2.1. Principle of adhesion between PDMS when oxygen plasma is applied 18
Figure 2.2. DNA complementary bond (a) double hydrogen bond between adenine (A) and thymine (T), (b) triple hydrogen bond between guanine (G) and cytosine (C) 19
Figure 4.1. The diagram and images of the liquid metal transparent electrodes (a) Schematic illustration of the liquid metal (LM) inject process and the cartoon of the LMTCE. Optical images of 2000 μm pitch... 30
Figure 4.2. Optical images by the channels of 2000 μm pitch with (a) 80 μm, (b) 40 μm width grid LMTCEs, and 200 μm pitch with (c) 80 μm, (d) 40 μm width grid LMTCEs. (e) Surface Profile of (a)-... 31
Figure 4.3. Vertical SEM images of the liquid metal channels of 2000 μm pitch with (a) 80 μm, (b) 40 μm width grid LMTCEs, and 200 μm pitch with (c) 80 μm, (d) 40 μm width grid LMTCEs. (e)-(h) The... 32
Figure 4.4. Transmittance values (a) Diagram of LMTCE Transmittance measurement, (b) transmittance of LM line, cross and empty section, Representative sections' transmittance of each... 33
Figure 4.5. IV curves of 2000 μm pitch with (a) 80 μm, (b) 40 μm width grid LMTCE, and 200 μm pitch with (c) 80 μm, (d) 40 μm width grid LMTCE(50.41 cm²) in the 500 mV applied voltage range. 34
Figure 4.6. Optical transmittance versus log scale of sheet resistance for grid LMCTE with representative studies on various types of transparent conductors. 37
Figure 4.7. The resistance rate of change by pressure of the liquid metal channels of 2000 μm pitch with (a) 80 μm, (b) 40 μm width grid LMTCEs, and 200 μm pitch with (c) 80 μm, (d) 40 μm width grid LMTCEs. 38
Figure 4.8. Optical images of Serpentine pattern LMTCE (a) before and (b) after LM injection, (c)-(d) Scale up optical images of (a)-(b), (e) IV curve of serpentine pattern LMTCE(50.41 cm²) in the 500... 39
Figure 4.9. Performance evaluation of LMTCE used as a heater. (a) After a current was applied to LMTCE (50.41 cm²) with a serpentine pattern, the heating pattern over time was photographed with... 40
Figure 4.10. (a) Schematic illustration of application (car model back panel heating). Optical images of (b) a car back panel model fabricated with 3D printing and (c) attached a serpentine pattern LMTCE... 41
Figure 5.1. Schematic illustration of the MPU chip fabricate process. (a) fabrication of PDMS master channel mold and (b) PDMS substrate, and (c) bonding and LM inject process. 45
Figure 5.2. Optical images of the DNA droplet, (a) movement of DNA droplet and (b) DNA droplet reached the reaction location. 46
Figure 5.3. Optical images of fluorescent DNA of (a) droplet extracted under electricity, (b) droplet before injection, and (c) droplet extracted after adding NaCl. 47
Figure 5.4. Optical image of fluorescent DNA attached to a glass substrate using APTES 48