신소재공학과

Seminar

Extra Form
Date 20181120

▣ MSE Special Seminar 

  

■ Title Novel nickel-hydroxide/oxyhydroxide actuating material that can be triggered by both light and electricity

 

■ Speaker : Prof. Alfonso H. W. Ngan (Department of Mechanical Engineering, University of Hong Kong)

 

■ Date and Time : 2018/11/20 (Tue), 14:00~15:00

 

■ Venue : Conference Room #1 (Applied Engineering Building W1-1, #2430)

 

■ Host : Prof. Hyuck-Mo Lee, Seung Min Han

 

■ Abstract : Here we report a novel actuating material – nickel hydroxide-oxyhydroxide – that exhibits enormous actuation due to a volume change stimulated either electrochemically, or by illumination of visible light of low intensities. For electrochemical actuation, Ni(OH)2/NiOOH is capable of undergoing fast, reversible, and large actuation in alkaline electrolytes under potentials of less than 1 V, due to a redox reaction involving volume changes. On the other hand, the light actuation of Ni(OH)2/NiOOH is due to its turbostratic crystal structure which is capable of intercalating water molecules. It is shown that the intercalated water can be rapidly and reversibly desorbed into the environment under visible light of low intensities, resulting in fast actuation driven wirelessly by light.

    By electroplating the actuating material on passive substrates, we have fabricated film-actuators capable of undergoing reversible bending and curling with an intrinsic actuating stress of tens of megapascals at response rates in the order of tens to hundreds of degrees per second, which are comparable to mammalian skeletal muscles. Also, by intentionally electroplating the nickel hydroxide-oxyhydroxide on selected areas of the substrate, we have also fabricated actuation devices of varies shapes and functions, e.g. a hinged actuator that can lift objects ~100 times of the weight of the actuating material is achieved, and other examples showing the potential use in robotic devices. The light-induced actuation mechanism reported here has the potential for realizing wirelessly powered micro-robotic devices.

 

Related publications:

[1] K.W. Kwan, S.J. Li, N.Y. Hau, W.D. Li, S.P. Feng and A.H.W. Ngan, (2018), “Light-stimulated actuators based on nickel hydroxide-oxyhydroxide”, Science Robotics3, eaat4051.  

[2] K.W. Kwan, N.Y. Hau, S.P. Feng and A.H.W. Ngan, (2017), “Electrochemical actuation of nickel hydroxide/oxyhydroxide at sub-volt voltages”, Sensors and Actuators B: Chemical 248, 657-664.

Atachment
Attachment '2'

List of Articles
No. Category Subject Author Date Views
Notice Regular 5/21 (Tue) Emeritus Prof. Joong Keun Park (Dept. of MSE, KAIST) ADMINI 2019.05.17 13
Notice Regular 5/17 (Tue) Prof. Su-Hyun Gong (Dept. of Physics, Korea Univ.) ADMINI 2019.05.10 167
Notice Special 5/7 (Tue) Prof. Dr. -ing. Dierk Raabe (MPIE) ADMINI 2019.04.30 111
Notice Regular 4/30 (Tue) Prof. Min Hyuk Park (School of MSE, Pusan National Univ.) ADMINI 2019.04.25 299
Notice Regular 4/23 (Tue) Prof. Seungwu Han (Dept. of MSE, SNU) ADMINI 2019.04.19 123
Notice Regular 4/9 (Tue) Prof. Ji Young Jo (GIST, School of MSE) ADMINI 2019.04.05 142
Notice Regular 4/2 (Tue) Prof. Li Oi Lun (Dept. of MSE, Pusan National Univ.) ADMINI 2019.03.29 177
256 Regular 3/27 (Tue) Prof. Seungbum Hong (KAIST MSE) ADMINI 2018.03.26 657
255 Regular 3/20 (Tue) Prof. Jung In-Ho (Seoul National University, MSE) ADMINI 2018.03.20 578
254 Regular 3/13 (Tue) Prof. Jong-Beom Baek (School of Energy and Chemical Engineering, UNIST) ADMINI 2018.03.13 542
253 Regular 3/6 (Tue) Prof. Seok-Young Ryu (KAIST CS) ADMINI 2018.03.05 444
252 Regular 2/27 (Tue) Dr. Jin-Woo Han (NASA) ADMINI 2018.02.27 518
251 Special 2/20 (Tue) Dr. Jae Beom Jang (Sungkyunkwan Univ) ADMINI 2018.02.19 489
250 Special 2/8 (Thu) Prof. Pei-Chen Su (Nanyang Technological University) file ADMINI 2018.02.05 521
249 Special 2/13 (Tue) Prof. Sungkyu Kim (Northwestern Univ) ADMINI 2018.01.31 546
248 Special 1/9 (Tue) Dr. Choon Won Byeon, ETRI ADMINI 2018.01.09 546
247 12/23 (Sat) Prof. Liangbing (Bing) Hu/Univ. of Maryland file ADMINI 2017.12.22 559
246 Regular 11/28 (Tue) Dr. Woo-Jin Lee (Ministry of Science and ICT.) ADMINI 2017.11.24 1214
245 Special 11/24 (Fri) Takashi NOGUCH (University of the Ryukyus) ADMINI 2017.11.23 890
244 Special 11/21 (Tue) Dr. Young Ki Lee (ETRI) file ADMINI 2017.11.20 1052
243 Special 11/22 (Wed) Prof. Sung Hoon Kang (Johns Hopkins University) file ADMINI 2017.11.20 1285
242 Regular 11/21 (Tue) Dr. Byoung Koun Min, (KIST) ADMINI 2017.11.17 1478
241 Special 11/13 (Mon) Dr. Hans Aage Hiuler (Danish Power System) ADMINI 2017.11.10 1698
240 Special 11/13 (Mon) Prof. Jens Oluf Jensen (Technical University of Denmark) ADMINI 2017.11.10 792
239 Regular 11/14 (Tue) Prof. Jae-Byum Chang (Sungkyunkwan Univ) ADMINI 2017.11.10 759
238 Regular 11/7 (Tue) Prof. Su-Mi Hur (Chonnam National University) ADMINI 2017.11.05 612
237 Regular 10/31 (Tue) Director Jang Sae Young (Samsung Electronics) ADMINI 2017.10.26 621
Board Pagination ‹ Prev 1 2 3 4 5 6 7 8 9 10 ... 15 Next ›
/ 15

Designed by sketchbooks.co.kr / sketchbook5 board skin

나눔글꼴 설치 안내


이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 Cancel

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5