Nanotechnology- the science of the small & the next big thing

Nanotechnology refers to a range of new technologies that aim to manipulate individual atoms and molecules in order to create new products. Laws of physics (quantum mechanics) come into play when handling materials and systems which are in atomic/nanometer regime as their characteristics such as strength, conductivity, colour, reactivity etc change. The challenge of nanotechnology is to be able to understand, manipulate and exploit the new, exciting properties at a nanometre level.

 

Nanoparticle	Nanobouquet	Nanocrystals	Nanowires
Pictures taken at Nanoscience Centre, Cambridge, UK

Selected publications

Peh, C. K. N., KE, L. and Ho, G.W.  (accepted in 2010).” Modification of ZnO nanorods through Au nanoparticles surface coating for dye-sensitized solar cells applications,” Materials Letters.

Hu, W.X., Wiria, Ong, W.L. and Ho, G.W.  (2010). "Well-controlled synthesis and self-assembly of Au nanostructures and its application in selective growth of ZnO nanowires," Colloids and Surfaces A: Physicochem. Eng. Aspects 358, 108.

Bela, S., Wong, A.S.W. and Ho, G.W. (2010). “Hydrolysis and ion exchange of titania nanoparticles towards large-scale titania and titanate nanobelts for gas sensing applications,” Journal of Physics D. 43, 35401.

Cai,Y.Q., Zhang, A.H., Feng,Y. P., Zhang, C., Teoh, H. F. and Ho, G.W. (2009). “Strain effects on work functions of pristine and potassium-decorated carbon nanotubes,” The Journal of Chemical Physics, 131, 224701.   

Yeow, S.C., Ong, W.L., Wong, A.S.W. and Ho, G.W. (2009). “Template-free synthesis and gas sensing properties of well-controlled porous tin oxide nanospheres,” Sensors and Actuators B, 143, 295.

Yong, M.J.Q., Wong, A.S.W., Ho, G.W. (2009). "Mesophase ordering and macroscopic morphology structuring of mesoporous TiO₂ film," Materials Chemistry and Physics, 116, 563.

Agarwala, S., Ho, G.W. (2009). "Synthesis and tuning of ordering and crystallinity of mesoporous titanium dioxide film," Materials Letters, 63, 1624.

Wong, A.S.W., Ho., G.W. (2009). "Aqueous synthesis towards vertically-aligned and selective pattern of ZnO nanostructures arrays," Advanced Materials Research, 67, 7.

Ho, S.Y. Wong, A.S.W., Ho, G.W. (2009). "Controllable porosity of monodispersed tin oxide nanospheres via additives free chemical route," Crystal Growth & Design, 9, 732

Seow, Z.L.S., Wong, A.S.W.,  Thavasi, V., Jose, R., Ramakrishna, S., Ho, G.W. (2009). "Controlled synthesis and application of ZnO nanoparticles, nanorods and nanospheres in dye-sensitized solar cells," Nanotechnology, 20, 45604.

Tan, E.T.H., Ho, G.W.,  et al. (2008). "Gas sensing properties of tin oxide nanostructures synthesized via solid-state reaction method," Nanotechnology, 19, 255706.

Wong, A.S.W., Ho, G.W. Chi, D.Z. (2008). "Enhanced ferromagnetic Fe-rich germanide film grown using magnetron sputtering employing a post-deposition anneal," J. Phys. D, 41, 42004.

Wang, C.H., Wong, A.S.W., Ho, G.W. (2007). "Facile solution route to vertically aligned , selective growth of ZnO nanostructure arrays," Langmuir, 23, 11960.

Ho, G.W., Wong, A.S.W. (2007). "One step solution synthesis towards ultra-thin and uniform single-crystalline ZnO nanowires," Applied Physics A, 86, 457.

Cha, S.N., Ho, G.W., et al. (2006). "High performance ZnO nanowire field effect transistor using self-aligned nanogap gate electrodes," Applied Physics Letter, 89, 263102 

Cha, S.N., Jang, J.E., Choi, Y., Ho, G.W., et al. (2005). "High performace ZnO nanowire field effect transistor," 35th European Solid-State Device Research Conference.

Amaratunga, G.A.J., The, A.S., Cha, S.N., Ho, G.W., et al. (2005). "Nanotube and nanowire transistors," International semiconductor conference.

Wong, A.S.W., Ho, G.W., et al. (2005). "Determination of the linear potential of GaN using electron holography," Materials Research Proc.  

Wong, A.S.W., Ho, G.W., et al. (2005). "Self-catalytic growth of GaN nanoneedles under Ga-rich condition, Microscopy of semiconducting materials," Proc. of 14th conference, April 11-14, Oxford, UK.

Ho, G.W., et al. (2004). "Three-dimensional crystalline SiC nanowire flowers," Nanotechnology, 15, 996.

 
Ho, G.W., et al. (2004). "Self-asssembled multi-coaxial crystalline nanowires within wires," Nano Letters, 4, 2023.

 
Ho, G.W., et al. (2002). "The growth of aligned carbon nanotubes on FeNiCo catalyst films," International Journal of Nanoscience,1, 79.

Ho, G.W., et al. (2001). "Electrical field-induced carbon nanotube junction formation," Applied Physics Letter, 79, 260.

Ho, G.W., et al. (2001). "Synthesis of well-aligned multiwalled carbon nanotubes on Ni catalyst using RF plasma-enhanced Chemical vapour deposition," Thin Solid Films, 388, 73.

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