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Home -> Faculty Members -> CHUA, Daniel
CHUA, Daniel
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Assistant Professor
B.Sc. (Hons), NUS, Singapore
Ph.D., Cambridge University, UK
Room: E1-07-04
Tel: +(65) 6516-8933
Fax: +(65) 6776-3604
E-mail: msechcd@nus.edu.sg
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Research Interests (click to read more)
Carbon-based Materials
- Diamond-like carbon films from Pulsed laser deposition technology and Filtered Cathodic Arc technology and
PIII system
- Diamond-like and Graphite-like carbon films, metal-oxide dopants in DLC/GLC.
- Integration of carbon nanotubes with DLC/GLC films.
- Effective electron emitters using hybrid carbon nanotubes.
- Surface modification of diamond-like / graphite-like
carbon films using PIII implantation
- Surface hydrogenation of DLC/GLC films.
Uses
- Applications of DLC/GLC in MEMS Technology
- Optical applications of DLC/GLC nanocomposites
- Bioapplications of DLC/GLC combined hydroxyapatite films
- Carbon-based materials for PEM fuel cells
- Protective coating technology using DLC films
- Carbon-based hybrid biomaterials for Engineering
Applications
Novel Materials for applications in MEMS Technology
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Research work includes growth, modelling and characterization of novel materials to study its suitability on complementary high performance materials for MEMS/NEMS. Materials include diamond-like amorphoous carbon, nanocomposites metal oxides, micro/nano-crystalline diamond. Research work also extends into integration of MEMS/NEMS with various nanomaterials and biomaterials for advanced high sensitivity and harsh environmental engineering applications.
Figure: Free-standing Diamond-like amorphous carbon films on NUS crest |
Selected Recent Publications
X. Li and Daniel H.C. Chua, "Diamond‑like carbon: A new
material base for nano‑architectures". Cosmos, 4 (2)
(2008): 203‑234
Teo, E.H.T, W.K.P. Yung, D H
C Chua and B.K. Tay, "Carbon Nano Mattress: A new Nano
system with intrinsic tuneable damping properties made of
carbon nanotubes covered with high sp3 amorphous carbon
layer". Advanced Materials, 19 (2007): 2941‑2945.
Daniel H.C. Chua,
W.I. Milne, D. Sheeja, B.K. Tay and D. Schneider
“Fabrication of diamond-like amorphous carbon cantilever
resonators”, Journal of Vacuum Science and Technology, B22,
2680 (2004) has also been selected for listings in Virtual
Journal of Nanoscale Science and Technology 10(21), (2004).
Daniel H.C. Chua, B.K. Tay, P. Zhang, E.H.T. Teo, L.T.W.
Lim, S. O’Shea, J. Miao and W.I. Milne “Vibratory response
of diamond-like amorphous carbon cantilevers under different
temperatures”, Diamond & Related Materials, 13, 1939 (2004)Optical properties of Carbon-based Nanocomposites Materials
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Incorporation of ZnO
nanoclusters in DLC/GLC films allowing monochromatic
photoluminescence at 377 nm.
Figure:
Photoluminescence spectra of ZnO doped DLC films. |
Selected Recent Publications
Foong, Y M, J Hsieh, X Li and
D H C Chua*, "The study on the effect of Erbium on
Diamond‑like carbon deposited by Pulsed Laser Deposition
technique". Journal of Applied Physics, 106 (2009)
064904 and selected for listing in Virtual Journal of
Nanoscale Science and Technology 20(14), 2009.
Hsieh,
J, Daniel H C Chua*, BK Tay, EHT Teo and M Tanemura,
"Monochromatic photoluminescence obtained from embedded ZnO
nanodots in an ultrahard diamond‑like carbon matrix".
Diamond and Related Materials, 17 (2008): 167‑170.
Teo, E.H.T, P Zhang, B.K. Tay
and D H C Chua, "Self‑assembled Ni nanoclusters in a
diamond‑like carbon matrix". International Journal of
Nanotechnology, 4, no. 4 (Regular) (2007): 424.
Carbon-based materials for PEM fuel cells
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Deposition of metal nanosized particles and carbon nanotubes
templates for PEM fuel cells. |
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Direct growth of multiwalled spagehetti-type densed carbon nanotubes on carbon paper backing. Robust control of the porosity of the gas-diffusion layer can be achieved.
Figure: Direct growth of CNTs on carbon paper.
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Enhanced performance of CNT-based MEA as compared with standard carbon-black based MEA as tested on 5 cm x 5 cm PEM fuel cell.
Figure: Enhanced performance demonstrated.
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Selected Publications
Tang, Z, C K Poh, K K LEE, D H C Chua*, Z tian and J Y Lin,
"Enhanced Catalytic Properties from Pt Nanodots covered
carbon nanotubes for PEM fuel cells". Journal of Power
Sources, 195 (2010) 155.
Tang, Z, C K Poh, K C Chin, Daniel H C Chua, J Y Lin and A
T S Wee, "Cobalt coated electrodes for high efficiency PEM
fuel cells by plasma sputtering deposition". Journal of
Applied Electrochemistry, (2009). In-press
Effective electron emitters using hybrid carbon nanotubes and surface modified DLC/GLC.
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Incorporation of HA clusters on surface of well aligned CNTs. SBF immersion shows that the CNTs are effective templates for growth of HA films.
Figure: Growth of HA on CNTs after SBF immersion for 16 days.
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Selected Recent Publications
Le Quang Tri and Daniel H C
Chua, "An investigation into the effects of High Laser
Fluence on HA/CaP films deposited by pulsed laser
deposition". Applied Surface Science, (2009). 76-80.
Thin and Thick Diamond-like carbon flms for Protective coatings application
Research work include deposition of ultrahard nanocomposites, various metal oxides/carbide films and testing various mechanical properties such as tribological, adhesion and Young's modulus of the protective coatings.
Selected Publications
B.K. Tay, Z.W. Zhao, Daniel
H.C Chua*. Review of "Review of Metal Oxide filmes
deposited by filtered cathodic vacuum arc", Materials
Science and Engineering R (Reports), 52, (2006): 1‑48.
D. Sheeja, B.K. Tay, X. Shi, S.P. Lau, Chua Daniel, S.M.
Krishnan, L.N. Nung, “Mechanical and Tribological
Characterisation of Diamond-like Carbon coatings on
Orthopedic Materials”, Diamond & Related Materials, 10, 1043
(2001)
B.K. Tay, X. Shi, H.S. Tan, Daniel H.C. Chua, “Investigation
of Tetrahedral amorphous Carbon films using X-ray
photoelectron and Raman Spectroscopy”, Surface and Interface
Analysis, 28, 231 (1999) Failure Analysis of Electronics Devices
This area of work is in the applications of surface analytical techniques, such as XPS, AES and SIMS for failure analysis and materials characterization of microelectronics and media devices. |
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