Sow Chorng Har


Sow Chorng Har

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Education

Bell Laboratories, Lucent Technoligies, Postdoctoral Training, 1999-2000
University of Chicago, Ph.D. in Physics, 1993-1998

National University of Singapore, M.Sc.1991-1993

National University of Singapore, (1st Class) B.Sc. 1987-1991


Service

President, Institute of Physics Singapore, 2012-

Vice Dean, Faculty of Science, 2012-
Assistant Dean, Faculty of Science, 2008-2012

Dy Head of Ohysics Department, 2007-2008

Asst Head of Physics Department, 2006-2007


Research Awards

Institute of Physics Singapore (IPS): 2006 IPS Nanotechnology Medal (Omicron Prize) for outstanding research in Nanotechnology done in Singapore
NUS, Faculty of Science: Young Scientist Award 2007


Teaching Awards

Faculty Teaching Excellence Award AY2002/2003, AY2003/2004, AY2004/2005, Honor Roll 2007, AY2008/2009
University Annual Teaching Excellence Award AY2002/2003, AY2003/2004, AY2004/2005, AY2005/2006, Honor Roll 2008
University Award: Outstanding Educator Award 2008
Fellow of the University Teaching Academy 2009-2012, 2012-2015


E-mail: physowch@nus.edu.sg


Research Interests

Colloid Interactions, Assembly and Phase Transitions
Nanospheres Lithography, Invented Mirror-Image method for tracking 3D motion of suspended sub-micron particles; Developed single and multiple trap optical tweezers using focused laser beams; Demonstration of tweezers-assisted sphere assembly


Carbon Nanotubes

Develop a laser pruning method to create unique 2D and 3D structure made of carbon nanotubes. Study of Field Emission properties of Unique Carbon Nanotube Arrays Large Area Patterning of Carbon Nanotube Arrays. MicroDevices made of Carbon Nanotubes.


Synthesis of Nanomaterials and Self-assembly and Assisted-Assembly of Nanomaterials

Synthesis of a wide variety of nanoscale metallic oxide materials. Self-assembly and assisted assembly of nanowires and nanowalls. Assembly of nanospheres with 3D Si pillars; Alignment of nanowires via fluidic flow. Application of nanostructured metallic oxide as field emitter, photo-sensor. Studies of the electrical, optical and mechanical properties of nanostructured materials.


Representative Publications

[1] "Assembly of Suspended Graphene on Carbon Nanotube Scaffolds with Improved Functionalities", Sharon Xiaodai Lim; Gavin Kok Wai Koon; Da Zhan; ZeXiang Shen; Barbaros Özyilmaz; C.H. Sow*, NANO RESEARCH 2012, 5, 783-795

[2] "Controllable unzipping for intramolecular junctions of graphene nanoribbons and single-walled carbon nanotubes", Wei, DC; Xie, LF; Lee, KK; Hu, ZB; Tan, SH; Chen, W; Sow, CH; Chen, KQ; Liu, YQ; Wee, ATS, Nature Communications 2013, V4, 1374

[3] "Direct Laser Pruning of CdSxSe1-x Nanobelts En Route to Multicolored Pattern with Controlled Functionalities", Junpeng Lu; Xiaodai Lim; Minrui Zheng; Subodh G. Mhaisalkar; C.H. Sow*, ACS NANO 2012, 6, 8298-8307

[4] "Reduced Graphene Oxide Conjugated Cu2O Nanowire Mesocrystals for High-Performance NO2 Gas Sensor", Deng, Suzi; Tjoa, Verawati; Fan*, Hai Ming; Tan, Hui Ru; Sayle, Dean C.; Olivo, Malini; Mhaisalkar, Subodh; Wei, Jun; Sow*, C.H., JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 2012, 134, 4905-4917 (Cover page of Nano Today)

[5] "Diameter-Dependent Thermal Transport in Individual ZnO Nanowires and its Correlation with Surface Coating and Defects", Bui, Cong Tinh; Xie*, Rongguo; Zheng, Minrui; Zhang, Qingxin; Sow, C.H.; Li*, Baowen; Thong*, John T. L., SMALL 2012, 8, 738-745

[6] "A Microfluidic Chip with Integrated Colloidal Crystal for Online Optical Analysis", Hoi, Siew-Kit; Chen, Xiao; Kumar, Vanga Sudheer; Homhuan, Sureerat; Sow, C.H.; Bettiol*, Andrew A., ADVANCED FUNCTIONAL MATERIALS 2011, 21, 2847-2853

[7] "An Electrically Tuned Solid-State Thermal Memory Based on Metal-Insulator Transition of Single-Crystalline VO(2) Nanobeams", Xie, Rongguo; Cong Tinh Bui; Varghese, Binni; Zhang, Qingxin; Sow, C.H.; Li*, Baowen; Thong*, John T. L.ADVANCED FUNCTIONAL MATERIALS 2011, 21, 1602-1607

[8] "Laser-Induced Rapid Carbon Nanotube Micro-Actuators", Lim, Zhi Han; Sow*, C.H., ADVANCED FUNCTIONAL MATERIALS 2010 20, 847-852

[9] "Capillarity-Assisted Assembly of Carbon Nanotube Microstructures with Organized Initiations", Lim, Xiaodai; Foo, Hee Wei Gary; Chia, Guo Hao; Sow*, C.H., ACS NANO 2010, 4, 1067-1075

[10] "Microstructuring of Graphene Oxide Nanosheets Using Direct Laser Writing", Zhou, Yong; Bao, Qiaoliang; Varghese, Binni; Tang, Lena Ai Ling; Tan, Chow Khim; Sow, C.H.; Loh*, Kian Ping, ADVANCED MATERIALS 2010, 22, 67

[11] ] "Thiol-Capped ZnO Nanowire/Nanotube Arrays with Tunable Magnetic Properties at Room Temperature", Deng, Su-Zi; Fan*, Hai-Ming; Wang, Miao; Zheng, Min-Rui; Yi, Jia-Bao; Wu, Rong-Qin; Tan, Hui-Ru; Sow, C.H.; Ding, Jun; Feng, Yuan-Ping; Loh*, Kian-Ping, ACS NANO 2010, 4, 495-505

[12] "Chemically Linked AuNP – Alkane Network for Enhanced Photoemission and Field Emission", Xie*, Xian Ning; Gao, Xingyu; Qi, Dongchen; Xie, Yilin; Shen, Lei; Yang, Shuo-Wang; Sow, C.H.; Wee*, Andrew Thye Shen, ACS NANO 2009, 3, 2722-2730

[13] "Metallic Nanoparticle Network for Photocurrent Generation and Photodetection", Xie*, Xian Ning; Xie, Yilin; Gao, Xingyu; Sow, C.H.; Wee, Andrew Thye Shen, ADVANCED MATERIALS 2009, 21, 3016

[14] "Numerical Investigations into the Tensile Behavior of TiO(2) Nanowires: Structural Deformation, Mechanical Properties, and Size Effects", Dai, L.; Sow, C. H.; Lim, C. T.; Cheong, W. C. D.; Tan*, V. B. C., NANO LETTERS 2009, 9, 576-582, (I.F. 13.2)

[15] "Structure-Mechanical Property of Individual Cobalt Oxide Nanowires", Varghese, Binni; Zhang, Yousheng; Dai, Ling; Tan, Vincent B. C.; Lim*, Chwee Teck; Sow*, C.H., NANO LETTERS 2008, 8, 3226-3232

[16] "Multicolored carbon nanotubes: Decorating patterned carbon nanotube microstructures with quantum dots", Lim, Xiaodai; Zhu, Yanwu; Cheong, Fook Chiong; Hanafiah, Nurmawati Muhammad; Valiyaveettil, Suresh; Sow*, C.H., ACS NANO 2008, 2, 1389-1395  (work highlighted by online magazine “Nanowerk.com”)

[17] "alpha-Fe2O3 nanoflakes as an anode material for Li-ion batteries", Reddy, M. V.; Yu, Ting; Sow, C.H.; Shen, Ze Xiang; Lim, Chwee Teck; Rao, G. V. Subba; Chowdari*, B. V. R., ADVANCED FUNCTIONAL MATERIALS 2007, 17, 2792-2799

[18] "Co3O4 nanostructures with different morphologies and their field-emission properties", Varghese, Binni; Hoong, Teo Choon; Yanwu, Zhu; Reddy, Mogalahalli V.; Chowdari, Bobba V. R.; Wee, Andrew Thye Shen; Vincent, Tan B. C.; Lim*, Chwee Teck; Sow*, C.H., ADVANCED FUNCTIONAL MATERIALS 2007, 17, 1932-1939

[19] “Co-synthesis of ZnO-CuO nanostructures by directly heating brass in air”, Zhu, Yanwu; Sow*, C.H.; Yu, Ting; Zhao, Qing; Li, Pinghui; Shen, Zexiang; Yu, Dapeng; Thong, John Thiam-Leong, ADVANCED FUNCTIONAL MATERIALS 2006, 16, 2415-2422

[20] "Multiwalled carbon nanotubes beaded with ZnO nanoparticles for ultrafast nonlinear optical switching", Zhu, YW; Elim, HI; Foo, YL; Yu, T; Liu, YJ; Ji, W; Lee, JY; Shen, ZX; Wee, ATS; Thong, JTL; Sow*, CH, ADVANCED MATERIALS 2006, 18, 587 (work highlighted by online magazine “Nanowerk.com”)

[21] "Substrate-friendly synthesis of metal oxide nanostructures using a hotplate", Yu, T; Zhu, YW; Xu, XJ; Yeong, KS; Shen, ZX; Chen, P; Lim, CT; Thong, JTL; Sow*, CH, SMALL 2006, 2, 80-84

[22] "Controlled growth and field-emission properties of cobalt oxide nanowalls", Yu, T; Zhu, YW; Xu, XJ; Shen, ZX; Chen, P; Lim, CT; Thong, JTL; Sow*, CH, ADVANCED MATERIALS 2005, 17, 1595

[23] ] "Large-scale synthesis and field emission properties of vertically oriented CuO nanowire films", Zhu, YW; Yu, T; Cheong, FC; Xu, XJ; Lim, CT; Tan, VBC; Thong, JTL; Sow*, CH, NANOTECHNOLOGY 2005, 16, 88-92

[24] "Laser pruning of carbon nanotubes as a route to static and movable structures", Lim, KY; Sow*, CH; Lin, JY; Cheong, FC; Shen, ZX; Thong, JTL; Chin, KC; Wee, ATS, ADVANCED MATERIALS 2003, 15, 300-303 (work highlighted on the coverpage of the journal)


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