CHAPTER 4. RESULTS AND DISCUSSION
4.5. Hierarchically mesoporous structured dielectric based pressure sensor
4.5.5 Artificial finger integrated multifunctional sensor
To demonstrate the capability of the multi-scale mesoporous structured multifunctional sensors as a motion detector, artificial fingers were developed by integrating the multifunctional sensors with artificial finger based on highly stretchable Ecoflex as shown in Figure 6a. Finger shaped three master molds were fabricated by using fused deposition modeling (FDM) based 3D printer with acrylonitrile butadiene styrene (ABS) filament. The 3D printing fabrication process is clearly seen in the movie of Figure Sx. And the Ecoflex solution was poured in finger-shaped molds and finger-shaped Ecoflex were
2.29 and 2.43 pF at three bending states with different angles of 30, 45, 90o, respectively. In order to demonstrate its ability to be applied to artificial hands applications, 4 artificial fingers were pixelated to array configuration to obtain spatial pressure and strain information as shown in Figure 6e. When we contact the ground with artificial fingertip, same level of pressure was applied to the sensors for few seconds and the measured capacitance signals obtained from sensors positioned to the fingertip. Also, we conduct joint bending test of artificial finger, the bending motion of fingers was successfully detected through sensors positioned to the finger joints respectively.
Figure 51. (a) The schematic fabrication image of artificial finger integrated HMD sensor. The capacitance changes for (b) the pressing and (c) the bending release movement of fingers. (d) The photographs of artificial finger array with HMD sensors (3 � 4) as pressure and strain detector and (e) under bending motion of fingers. (f) The three-dimensional column graph of the capacitance responses under bending motion of fingers
CONCLUSION
In summary, we demonstrated silk fibroin-based biodegradable composite-type nanogenerators with controllable lifetime for powering to the implantable devices. The composites are fabricated as 2D thin films and 1D wires by using a silk fibroin solution and lead-free ferroelectric (BaTiO3, ZnSnO3, BNKT, and KNN:Mn) nanoparticles. The piezoelectric output voltage and current density reached 2.2 V and 0.12 µA/cm2in the silk fibroin composite thin film, and 1.8 V and ~ 0.1 µA/cm2in the wire under the motion of a foot step when 30 wt% KNN:Mn nanoparticles are dispersed. Here, Ag nanowires and PVP are used to enhance the dispersion of the nanoparticles and it is also thought that the PVP prevents Ag nanowires from connecting with each other, reducing the conductivity of the composite film. A series of composite nanogenerators with different nanoparticles were fabricated and showed that the composite generator with KNN:Mn generated the largest output power because of the largest piezoelectric coupling figure of merit. Additionally, the lifetime of the device can be also controlled in water with glycerol concentration up to 48 hrs. Thus, the devices have great potential for powering to the implantable electronic device and the future smart clothing industry. Additionally, we reported highly stretchable two-dimensional fabrics for wearable triboelectric nanogenerator for powering to wearable electronic devices. First, fibers were prepared, which mainly consists of Al wires and PDMS tubes with high-aspect-ratio nanotextured surface with vertically aligned nanowires. The fiber- structured nanogenerator showed an output power of 40 V and 10 μA, a stable output performance even under a high humid environment under cycled compressive force of 50 N. The FTENG was then fabricated by weaving the fibers, followed by bonding to a waterproof fabric for all-weather use. It showed a high output voltage and current value of 40 V and 210 μA, corresponding to the instantaneous power output of 4 mW, under same cycled compressive force. The fabric was also found to be quite stretchable up to over 25 %, enough for use in smart clothing applications and other wearable electronics.
Finally, we achieved a stable output performance from the nanogenerator even highly-stretched condition. Additionally, the FTENG was employed in applications for foot-step driven large-scale power mats during walking and power clothing attached to the elbow. It is believed that this approach
stability and the enhanced output power. To collect a large work function difference, a functional group such as positively charged DMAP on the surface of Au NPs was prepared by phase transfer method. By UPS measurement, it was clearly observed that the DMAP lowered the effective work function of the Au NPs. This ascribes to the interfacial dipole within a few nanometers, induced from partial protonation of the exocyclic nitrogen atom that extends away from the surface of the Au NPs, thereby, increasing the potential difference with the negative triboelectric materials. This increased the transferred charge density on both surfaces, proved by KPFM measurement. The designed TENG gives an output performance up to 80 V, 86 μA and 2.5 mW in output power, 2 ~ 2.5 times enhancement compared with the conventional TENGs. We also found a stable output performance from the TENG.
With the integration with AC to DC converting circuit and buck-boost circuit, the TENG was demonstrated to produce a constant voltage of 2.6 V. The wireless sensing system was also demonstrated by the output voltage from the TENG, which operates the remote controller, resulted in turning on a siren of the system. It is believed that this work will serve as a stepping stone for high performance and stable TENG studies and will also inspire the big development of the TENG towards self-powered electronics in the near future. For wearable self-powered triboelectric foot pressure sensor, we reported the replaceable and multifunctional TENG with the triangular prism shaped supporter to enhance the uniformity of contact and separation during walking. The supporter, ergonomically designed by considering the human walking style, was sponge-like mesoporous PDMS films fabricated by 3D printed mold-casting method. When the supporter with an angle of 25 o was used, the output voltage and current of 64 V and 55 μA was generated, 1.5 mW in output power, showing an enhancement of approximately 600 %, compared with the flat TENG. The enhancement is due to the uniform contact between Al and PDMS when walking. We also demonstrated the self-powered pressure distribution sensor for monitoring the local pressure actions of human foot. The two-dimensional contour plot successfully showed the unique pressure distribution with three human gait patterns.
Additionally, we fabricated the hierarchically mesoporous structured dielectric (HMD) capacitive pressure sensor with gradually increasing pore size along the longitudinal direction by the gravitational control using high-speed rotation. A biocompatible and stretchable porous dielectric layer was used, resulting in highly sensitive pressure sensor with high sensitivity, linearity and high stable property over 10,000 cycles and extremely low-pressure detection of 2 Pa. The strain sensitivity of the sensors differed according to the bending direction due to gradient porous structure. Additionally, the resulting HMD pressure sensors were demonstrated to fabricate the artificial finger thus achieving successful tactile sensing of various motion. The developed high-performance electronic skin may open new opportunities for innovative application such as health monitoring and human-machine interfaces.
REFERENCES
[1] S. Gong, W. Schwalb, Y. Wang, Y. Chen, Y. Tang, J. Si, B. Shirinzadeh, W. Cheng, Nat.
Commun., 2014, 5, 3132-3139.
[2] C. Wang, D. Hwang, Z. Yu, K. Takei, J. Park, T. Chen, B. Ma, A. Javey, Nat. Mater., 2013, 12, 899-904.
[3] W. Wu, X. Wen, Z. L. Wang, Science, 2013, 340, 952-957.
[4] C. Bartolozzi, L. Natale, F. Nori, G. Metta,Nat. Mater., 2016, 15, 921-925.
[5] N. Lu, D.-H. Kim, Soft Robot., 2014, 1, 53-62.
[6] S. Bauer, S. Bauer-Gogonea, I. Graz, M. Kaltenbrunner, C. Keplinger, R. Schwödiauer, Adv.
Mater., 2014, 26, 149-162.
[7] T. Zhou, C. Zhang, C. B. Han, F. R. Fan, W. Tang, Z. L. Wang, ACS Appl. Mater. Interfaces.
2014, 6, 14695-14701.
[8] J. Zhong, Y. Zhang, Q. Zhong, Q. Hu, B. Hu, Z. L. Wang, J. Zhou, ACS Nano2014, 8, 6273- 6280.
[9] W. Seung, M. K. Gupta, K. Y. Lee, K.-S. Shin, J.-H. Lee, T. Y. Kim, S. Kim, J. Lin, J. H. Kim, S.-W. Kim, ACS Nano 2015, 9, 3501-3509.
[10] F.-R. Fan, Z.-Q. Tian, Z. L. Wang, Nano Energy2012, 1, 328-334.
[11] Y. Yang, H. Zhang, X. Zhong, F. Yi, R. Yu, Y. Zhang, Z. L. Wang, ACS Appl. Mater. Interfaces.
2014, 6, 3680-3688.
[12] S. Wang, S. Niu, J. Yang, L. Lin, Z. L. Wang, ACS Nano2014, 8, 12004-12013.
[13] J. Yang, J. Chen, Y. Yang, H. Zhang, W. Yang, P. Bai, Y. Su, Z. L. Wang, Adv. Energy Mater.
2014, 4, 1301322-1301330.
[14] J. Bae, J. Lee, S. Kim, J. Ha, B.-S. Lee, Y. Park, C. Choong, J.-B. Kim, Z. L. Wang, H.-Y. Kim, et al. Nat. Commun. 2014, 5, 4929-4937.
[15] Y. Yang, G. Zhu, H. Zhang, J. Chen, X. Zhong, Z.-H. Lin, Y. Su, P. Bai, X. Wen, Z. L. Wang,
[20] J. Yang, J. Chen, Y. Su, Q. Jing, Z. Li, F. Yi, X. Wen, Z. Wang, Z. L. Wang, Adv. Mater. 2015, 27, 1316-1326.
[21] X. Chen, M. Iwamoto, Z. Shi, L. Zhang, Z. L. Wang, Adv. Funct, Mater. 2015, 5, 739-747.
[22] Q. Jing, G. Zhu, W. Wu, P. Bai, Y. Xie, R. P. S. Han, Z. L. Wang,Nano Energy2014, 10, 305- 312.
[23] G. Zhu, C. Pan, W. Guo, C.-Y. Chen, Y. Zhou, R. Yu, Z. L. Wang, Nano Lett. 2012, 12, 4960- 4965.
[24] H.-J. Kim, K. Sim, A. Thukral, C. Yu.Sci. Adv.2017, 3, e1701114.
[25] H.-H. Chou, A. Nguyen, A. Chortos, J. W.F. To, C. Lu, J. Mei, T. Kurosawa, W.-G. Bae, J. B.-H.
Tok, Z. Bao, Nat. Commun.2015,6, 8011-.
[26] G. Y. Bae, S. W. Pak, D. Kim, G. Lee, D. H. Kim, Y. Chung, K. Cho, Adv. Mater.2016,28, 5300- 5306.
[27] Y. Shu, H. Tian, Y. Yang, C. Li, Y. Cui, W. Mi, Y. Li, Z. Wang, N. Deng, B. Peng, T.-L. Ren, Nanoscale2015, 18, 8636-8644.
[28] T. Y. Choi, B.-U. Hwang, B.-Y. Kim, T. Q. Trung, Y. H. Nam, D.-N. Kim, K. Eom, N.-E. Lee, ACS appl. Mater. Interfaces2017, 9, 18022-18030.
[29] D. Y. Khang, H. Jiang, Y. Huang, J. A. Rogers, Science2006, 311, 208-212.
[30] Y. Cheng, R. Wang, H. Zhai, J. Sun, Nanoscale2017, 9, 3834.
[31] M. S. Sarwar, Y. Dobashi, C. Preston, J. K. M. Wyss, S. Mirabbasi, J. D. W. Madden, Sci. Adv.
2017, 3, e1602200.
[32] S. Yao, Y. Zhu, Nanoscale2014, 6, 2345-2352.
[33] L. Cai, L. Song, P. Luan, Q. Zhang, N. Zhang, Q. Gao, D. Zhao, X. Zhang, M. Tu, F. Yang, W.
Zhou, Q. Fan, J. Luo, W. Zhou, P. M. Ajayan, S. Xie, Sci. Rep.2013, 3, 3048.
[34] O. Ohnishi, H. Kishie, A. Iwamoto, Y. Sasaki, T. Zaitsu, T. Inoue, Ultrasonics symposium.1992, 1, 483-488.
[35] J. Kim, M. Lee, H. J. Shim, R. Ghaffari, H. R. Cho, D. Son, Y. H. Jung, M. Soh, C. Choi, S. Jung, et al. Nat. Commun. 2014, 5, 5747-5757.
[36] Y. Xie, Y. Liu, Y. Zhao, Y. H. Tsang, S. P. Lau, H. Huang, Y. Chai, J. Mater. Chem. A. 2014, 2, 9142-9149.
[37] M. Chen, K. Hagedorn, H. Cölfen, S. Polarz, Adv. Mater.2017, 29, 1603356.
[38] L. Pan, A. Chortos, G. Yu, Y. Wang, S. Isaacson, R. Allen, Y. Shi, R. Dauskardt, Z. Bao, Nat.
Commun. 2014, 5, 3002.
[39] R.-Z. Li, A. Hu, T. Zhang, K. D. Oakes, ACS Appl. Mater. Interfaces2014, 6, 21721.
[40] C. Pan, L. Dong, G. Zhu, S. Niu, R. Yu, Q. Yang, Y. Liu, Z. L. Wang, Nat. Photonics2013, 7, 752.
[41] Z. L. Wang, J. Song, Science2006, 312, 242.
[42] S. Bauer, R. Gerhard-Multhaupt, G. M. Sessler, Phys. Today2004, 57, 37.
[43] I. Graz, M. Kaltenbrunner, C. Keplinger, R. Schwodiauer, S. Bauer, S. P. Lacour, S. Wagner, Appl. Phys. Lett.2006, 89, 073501.
[44] C. Dagdeviren, Y. Su, P. Joe, R. Yona, Y. Liu, Y.-S. Kim,Y. Huang, A. R. Damadoran, J. Xia, L.
W. Martin, Y. Huang, J. A. Rogers, Nat. Commun. 2014, 5, 4496.
[45] E. S. Nour, M. O. Sandberg, M. Willander, O. Nur, Nano Energy 2014, 9, 221.
[46] X. Zhang, J. Hillenbrand, G. M. Sessler, J. Appl. Phys. 2007, 101, 054114.
[47] F.R. Fan, L. Lin, G. Zhu, W.Z. Wu, R. Zhang, Z.L. Wang, Nano Lett.2012, 12, 3109–3114.
[48] G. Zhu, W.Q. Yang, T.J. Zhang, Q.S. Jing, J. Chen, Y.S. Zhou, P. Bai, Z.L. Wang, Nano Lett.
2014, 14, 3208–3213.
[49] Y. Yang, H.L. Zhang, Z.H. Lin, Y.S. Zhou, Q.S. Jing, Y.J. Su, J. Yang, J. Chen, C.G. Hu, Z.L.
Wang, ACS Nano2013, 7, 9213–9222.
[50] L. Lin, Y.N. Xie, S.H. Wang, W.Z. Wu, S.M. Niu, X.N. Wen, Z.L. Wang, ACS Nano2013, 7, 8266–8274.
[51] B. Meng, W. Tang, Z.H. Too, X.S. Zhang, M.D. Han, W. Liu, H.X. Zhang, Energy Environ. Sci.
2013, 6, 3235–3240.
[52] Y. Yang, H.L. Zhang, X.D. Zhong, F. Yi, R.M. Yu, Y. Zhang, Z.L. Wang, ACS Appl. Mater.
Interfaces2014, 6, 3680–3688.
[53] H.-K. Lee, J. Chung, S.-I. Chang, E. Yoon, J. Micromech. Microeng.2011, 21, 035010.
[54] A. Frutiger, J. T. Muth, D. M. Vogt, Y. Mengüç, A. Campo, A. D. Valentine, C. J. Walsh, J. A.
Lewis, Adv. Mater.2015, 27, 2440.
[55] D. J. Lipomi, M. Vosgueritchian, B. C. K. Tee, S. L. Hellstrom, J. A. Lee, C. H. Fox, Z. Bao, Nat.
Nanotechnol.2011, 6, 788.
[56] Y. Zang, F. Zhang, D. Huang, X. Gao, C.-A. Di, D. Zhu, Nat. Commun.2015, 6, 6269.
[57] C.-L. Choong, M.-B. Shim, B.-S. Lee, S. Jeon, D.-S. Ko, T.-H. Kang, J. Bae, S. H. Lee, K.-E.
[63] T. Someya, T. Sekitani, S. Iba, Y. Kato, H. Kawaguchi, T. Sakurai, Proc. Natl. Acad. Sci. USA 2004, 101, 9966.
[64] V. Maheshwari, R. F. Saraf, Science2006, 312, 1501.
[65] C. Yan, J. Wang, W. Kang, M. Cui, X. Wang, C. Y. Foo, K. J. Chee, P. S. Lee, Adv. Mater.2014, 26, 2022.
[66] K.-Y. Chun, Y. Oh, J. Rho, J.-H. Ahn, Y.-J. Kim, H. R. Choi, S. Baik, Nat. Nanotechnol.2010, 5, 853.
[67] K.Y. Lee, D. Kim, J.–H. Lee, T.Y. Kim, M.K. Gupta, S.–W. Kim, Adv. Funct. Mater.2014,24, 37-43.
[68] C.W. Ahn, S.S. Won, A. Ullah, S.Y. Lee, S.D. Lee, J.H. Lee, W. Jo, I.W. Kim, Curr. Appl. Phys.
2012, 12, 903-907.
[69] S.Y. Lee, C.W. Ahn, A. Ullah, H.J. Seog, J.S. Kim, S.H. Bae, I.W. Kim, Curr. Appl. Phys.2011, 11, S266-S269.
[70] B. D. Lawrence, M. Cronin-Golomb, I. Georgakoudi, D. L. Kaplan, F.G. Omenetto Biomacromolecules.2008, 9, 1214-1220.
[71] S.T. Parker. P. Domachuk, J. Amsden, J. Bressner, J.A. Lewis, D.L. Kaplan, F.G. Omenetto, Adv.
Mater. 2009, 21, 2411-2415.
[72] H. Perry, A. Gopinath, D.L. Kaplan, L.D. Negro, F.G. Omenetto, Adv. Mater.2008, 20, 3070- 3072.
[73] Y. Choi, M. Gu, J. Park, H.-K. Song, B.-S. Kim, Adv. Energy Mater.2012, 2, 1510-1518.
[74] M. Brust, M. Walker, D. Bethell, D. J. Schiffrin, R. Whyman, J. Chem. Soc., Chem. Commun.
1994, 801-802.
[75] A. C. Templeton, W. P. Wuelfing, R. W. Murray, Acc. Chem. Res.2000, 33, 27-36.
[76] A. Wijaya, K. Hamad-Schifferli, Langmuir2008, 24, 9966-9969.
[77] N. R. Jana, L. Gearheart, C. J. Murphy, Langmuir2001, 17, 6782-6786.
[78] D.-S. Leem, A. Edwards, M. Faist, J. Nelson, D.D.C. Bradley, J.C.d. Mello, Adv. Mater. 2011, 23, 4371-4375.
[79] L. Hu, H.S. Kim, J.-Y. Lee, P. Peumans, Y. Cui, ACS Nano2010, 4, 2955-2963.
[80] C.-H. Liu, X. Yu, Nanoscale. Res. Lett.2011, 6, 75-82.
[81] W. Zheng, X. Lu, W. Wang, Z. Wang, M. Song, Y. Wang, C. Wang, Phys. Stat. Sol. (a). 2010, 207, 1870–1873.
[82] T. Liu, A.L. Ding, X.Y. He, X.S. Zheng, Phys. Stat. Sol. (a).2006, 203, 3861–3867.
[83] D.M. Lin, K.W. Kwok, H.Y. Tian, H. Chan, J. Am. Ceram. Soc.2007, 90, 1458–1462.
[84] Y.G. Lv, C.L. Wang, J.L. Zhang, M.L. Zhao, M.K. Li, H.C. Wang, Mater. Lett.2008, 62, 3425–
3427.
[85] Y. Qi, C. McAlpine, Energy Environ. Sci.2010, 3, 1275-1285.
[86] R. A. Islam, S. Priya, Appl. Phys. Lett.2006, 88, 032903-032905.
[87] M. Bichurin, V. Petrov, A. Zakharov, D. Kovalenko, S.C. Yang, D. Maurya, V. Bedekar, S. Priya, Materials. 2011, 4, 651-702.
[88] S. Lu, X. Wang, Q. Lu, X. Zhang, J.A. Kluge, N. Uppal, F.G. Omenetto, D.L. Kaplan, Biomacromolecules.2010, 11, 143-150.
[89] D.-S. Leem, A. Edwards, M. Faist, J. Nelson, D.D.C. Bradley, J.C.d. Mello, Adv. Mater. 2011, 23, 4371-4375.
[90] L. Hu, H.S. Kim, J.-Y. Lee, P. Peumans, Y. Cui, ACS Nano2010, 4, 2955-2963.
[91] C.-H. Liu, X. Yu, Nanoscale. Res. Lett.2011, 6, 75-82.
[92] W. Zheng, X. Lu, W. Wang, Z. Wang, M. Song, Y. Wang, C. Wang, Phys. Stat. Sol. (a).2010, 207, 1870–1873.
[93] T. Liu, A.L. Ding, X.Y. He, X.S. Zheng, Phys. Stat. Sol. (a).2006, 203, 3861–3867.
[94] Y. Kang, B. Wang, S. Dai, G. Liu, Y. Pu, C. Hu, ACS Appl. Mater. Interfaces.2015, 7, 20469.
[95] Y. Mao, D. Geng, E. Liang, X. Wang, Nano Energy2015, 15, 227.
[96] Y. H Ko, G. Nagaraju, S. H. Lee, J. S. Yu, ACS Appl. Mater. Interfaces.2014, 6, 6631.
[97] L. Zhang, B. Zhang, J. Chen, L. Jin, W. Deng, J. Tang, H. Zhang, H. Pan, M. Zhu, W. Yang, Z.
L. Wang, Adv. Mater.2016, 28, 1650.
[98] J. Bae, J. Lee, S. Kim, J. Ha, B.-S. Lee, Y. Park, C. Choong, J.-B. Kim, Z. L. Wang, H.-Y. Kim, J.-J. Park, U.-I. Chung, Nat. Commun.2015, 5, 4929.
CURRICULUM VITAE Kyeong Nam Kim
Street Address: UNIST-gil 50, Eonyang-eup, Ulju-gun, Ulsan, Republic of Korea, 44919.
E-mail: [email protected] ∙ Phone: +82-10-2475-1828 EDUCATION
2015-2018
Ulsan National Institute of Science and Technology (UNIST)l
Ph.D in Materials Science and Engineering.
l
Supervisor: Professor, Jeong Min Baik
2013-2015
Ulsan National Institute of Science and Technology (UNIST)l
M.S. in Materials Science and Engineering.
l
Supervisor: Professor, Jeong Min Baik
2007-2013
Korea University of Technology and Education (Korea Tech)l
B.S. in Energy & Materials Science and Chemical Engineering
RESEARCH EXPERIENCE
1.
Piezoelectric and Triboelectric Generatorsl
Ferroelectric nanoparticle composite for piezoelectric generators
l
Wearable energy harvester such as power textile/shoes
l
Triboelectric generators for sustainable energy conversions
2.
Multifunctional sensors for sensing pressure and acceleration or gasl
Anisotropic porous structured capacitive pressure sensor for linear sensitivity.
l
Highly sensitive pressure sensor based on triboelectrification.
l
Au NPs Droplet based piezoresistive pressure sensor for highly sensitive pressure detection
l
3D printed mesoporous soft sensors for highly sensitive detection
TEACHING EXPERIENCETeaching Assistant
2015, Spring
Teaching Assistant, Semiconductor Physics and Devices, Department ofMaterials Science and Engineering, Ulsan National Institute of Science and Technology
2014, Fall
Teaching Assistant, Introduction to Semiconductor,Department of
Materials Science and Engineering, Ulsan National Institute of Science and
Technology
Mentoring
2017~present
Busan Science High School,Advised four high school students on independent research projects
l
Training support provided by: 2017 Busan Science High School R&E Program
l
Thesis: Development of Mesoporous Structure based Highly Sensitive Pressure Sensor
2015~2016
Busan Science High School,Advised five high school students on independent research projects
l
Training support provided by: 2015 Busan Science High School R&E Program
l
Thesis: Triboelectric Nanogenerator for harvesting Water Flow Energy 2014~2015
Busan Science High School,Advised five high school students on
independent research projects
l
Training support provided by: 2015 Busan Science High School R&E Program
l
Thesis: Mechanism of Tribology Generation and Application
2013~2014
Bangeojin High School, Advised four high school students on independentresearch projects
l
Training support provided by: 2013 UNIST-Science High School R&E Program
l
Thesis: Fabrication of Bio Compatible/Degradable device: Silk Fibroin based Piezoelectric Composite Nanogenerator.
HONORS
2018
l Overseas Training as Post-doctoral Fellowship, National ResearchFoundation
(NRF) 20181.
Kyeong Nam Kim, Jeong Min Baik*, “Au NPs droplet basedpiezoresistive pressure sensor for highly sensitivity”, ACS Appl. Mater.
Interfaces.
In preparation.
2.
Kyeong Nam Kim, Jeong Min Baik*, “Hierarchically mesoporousstructured dielectric based pressure sensor for linearly and highly sensitive detection.”, Adv. Funct. Mater. In preparation.
3. Qitao Zhou, JunKyu Park,
Kyeong Nam Kim, Jeong Min Baik, TaesungKim*, “Self-Powered Highly Sensible Touch Screen with Triboelectrification”,
Nano Energy,2018, (Dr. Q. Zhou, J. Park are equally contributed in this work.), IF = 12.343.
4. Jin Pyo Lee, Byeong Uk Ye, Kyeong Nam Kim, Jae Won Lee, Won Jun Choi, Jeong Min Baik*, “3D Printed Noise-Cancelling Triboelectric Nanogenerator”, Nano Energy, Vol 38, pp. 377-384
(2017), IF = 12.343.5. Jae Won Lee, Hye Jin Cho, Jinsung Chun, Kyeong Nam Kim, Seongsu Kim, Chang Won Ahn, Ill Won Kim, Sang-Woo Kim, Changduk Yang*, Jeong Min Baik*, “Robust Nanogenerators Based on Graft Copolymers via Control of Dielectrics for Remarkable Output Power Enhancement”, Published,
Sci. Adv.,Vol 3, p. e1602902 (2017). (J. W. Lee, H. J. Cho are equally contributed in this work.)
6. Yun Kyung Jung,
Kyeong Nam Kim, Jeong Min Baik*, Byeong-SuKim*, “Self-powered triboelectric aptasensor for label-free highly specific thrombin detection”,
Nano Energy,Vol 30, pp. 77-83
(2016).(Dr. Y. K. Jung, K. N. Kim are equally contributed in this work.)
IF = 12.343.7.
Kyeong Nam Kim, Jin Pyo Lee, Sung-Ho Lee, Sung Chul Lee,Jeong Min Baik*, "Ergonomically Designed Replaceable and Multifunctional Triboelectric Nanogenerator for Uniform Contact", RSC
Adv., Vol 8, pp. 88526-88530 (2016), IF = 3.108.8.
Kyeong Nam Kim, Yun Kyung Jung, Jinsung Chun, Byeong Uk Ye,Minsu Gu, Eunyong Seo, Seongsu Kim, Sang-Woo Kim, Byeong-Su Kim*, Jeong Min Baik*, "Surface dipole enhanced instantaneous charge pair generation in triboelectric nanogenerator",
Nano Energy, Vol. 26.pp. 360-370 (2016). (Dr. Y. K. Jung, K. N. Kim are equally contributed in this work.)
IF = 12.343.9.
Kyeong Nam Kim, Jinsung Chun, Jin Woong Kim, Keun Young Lee,Jang-Ung Park, Sang-Woo Kim, Zhong Lin Wang, and Jeong Min Baik*,
“Highly Stretchable Two-Dimensional Fabrics for Wearable
Triboelectric Nanogenerator under Harsh Environment”,
ACS Nano,Vol. 9, pp. 6394-6400 (2015), IF = 13.942.
10.
Kyeong Nam Kim, Jinsung Chun, Song A Chae, Chang Won Ahn, IllWon Kim, Sang-Woo Kim, Zhong Lin Wang, Jeong Min Baik*,"Silk fibroin-based Biodegradable Piezoelectric Composite Nanogenerators using Lead-free Ferroelectric Nanoparticles, Nano Energy, Vol. 14, pp.
87-94 (2015), IF = 12.343.
11.Keun Young Lee, Jinsung Chun, Ju-Hyuck Lee, Kyeong Nam Kim, Na-Ri Kang, Ju-Young Kim, Myung Hwa Kim, Kyung-Sik Shin, Manoj Kumar Gupta, Jeong Min Baik*, and Sang-Woo Kim*, "Hydrophobic Sponge Structure-Based Triboelectric Nanogenerator", Adv. Mater., Vol. 26, pp. 5037-5042 (2014), IF = 19.791.
PATENTS
1. Jeong Min Baik, Kyoung Jin Choi,
Kyeong Nam Kim,“Pressure Sensor” Korea, Patent No. 10-2017-0161001 (2017).
2. Jeong Min Baik, Young Min Kwon, Kyeong Nam Kim, “Hydrogen Gas Sensor.” Korea, Patent No. 10-2017-0070967 (2017).
3. Jeong Min Baik, Kyeong Nam Kim, Young Min Kwon, “3D Printed Gas Sensor Platform.” Korea, Patent No. 10-2017-0068662 (2017).
4. Jeong Min Baik,
Kyeong Nam Kim, “Slope Based TriboelectricNanogenerator and Method Thereof.” Korea, Patent No. 10-2016- 0074720 (2016).
5. Jeong Min Baik,
Kyeong Nam Kim,Jin Pyo Lee, “Triboelectric Generator.” Korea, Patent No. 10-2016-0057217 (2016).
6.
[Patent Registration]Jeong Min Baik, Jinsung Chun,
Kyeong Nam Kim, Byung Wook Park, “Triboelectric Cable-type Generator and ItsFabrications for Energy Harvesting.” Korea, Patent No. 10-2014-
0057855 (2014), 1016540750000 (2016).
Cartridge Structured Replaceable Triboelectrification based Self- Powered Sensor for Detecting Human Movement on Shoes.
3. Nanoenergy and Nanosystems (NENS 2016), China, July 13 – 15, 2016.
Oral:
Efficient Charge Transfer by Charged Au Nanoparticles for Enhancing Triboelectric Nanogenerator Performance.
4. Materials Research Society (MRS), USA, April 6-10, 2015.
Oral:Highly Stretchable Fabric-structured Triboelectric Nanogenerator for Powering to Wearable Electronic Devices.
5. Nanoenergy and Nanosystem (NENS), China, December 8-10, 2014.
Oral:
Silk Fibroin-based Biodegradable and Transparent Composite Nanogenerator using Lead-Free Ferroelectric Nanoparticles.
6. International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE), Korea, November 16-19, 2014. Poster:
Silk based Time-Controllable, Biocompatible and Transparent Piezoelectric Composite Nanogenerator using Lead-Free Ferroelectric Nanoparticles.
7. International NanoPhotonics and nanoEnergy Conference (INPEC), Korea, July 1-2, 2014.
Poster:Silk based Time-Controllable, Biocompatible and Transparent Piezoelectric composite Nanogenerator using Lead-free ferroelectric Nanoparticles.
Domestic Conference
1. 2016 IEIE Fall Conference, November 25–26, 2016.
Oral:Ergonomically Designed Replaceable and Multifunctional Triboelectric Nanogenerator for Uniform Contact
2. The Korean Institute of Metals and materials (KIM 2016), April 27 – 29, 2016.
Poster:Charge-controlled Au Nanoparticles Supported Stretchable Electrodes for Enhancing Triboelectric Nanogenerator Performance.
3. Korea Society of Optoelectronics (KSOE 2016), Korea, January 26 – 27, 2016.
Oral:Surface dipole enhanced instantaneous charge pair generation in triboelectric nanogenerator.
SKILLS
Technical: