Source: ISI Citation Database (Last updated: 23 October 2009)

Selected Recent Publications by Topic

Epitaxial Graphene

Gao XY, Chen S, Liu T, Chen W, Wee ATS, Nomoto T, Yagi S, Soda K, Yuhara J
Si clusters on reconstructed SiC (0001) revealed by surface extended x-ray absorption fine structure
APPLIED PHYSICS LETTERS Volume: 95 Issue: 14 Article Number: 144102 Published: OCT 5 2009
 

Lu J, Loh KP, Huang H, Chen W, Wee ATS
Plasmon dispersion on epitaxial graphene studied using high-resolution electron energy-loss spectroscopy
PHYSICAL REVIEW B Volume: 80 Issue: 11 Article Number: 113410 Published: SEP 2009
 

Huang H, Chen W, Chen S, Wee ATS
Bottom-up Growth of Epitaxial Graphene on 6H-SiC(0001)
ACS NANO Volume: 2 Issue: 12 Pages: 25... Published: DEC 2008

[STM image appeared in Nature News 25 March 2009 Nature 458, 390-391 (2009): http://www.nature.com/news/2009/090325/full/458390a.html]

Gao XY, Chen S, Liu T, Chen W, Wee ATS, Nomoto T, Yagi S, Soda K, Yuhara J
Disorder beneath epitaxial graphene on SiC(0001): An x-ray absorption study
PHYSICAL REVIEW B Volume: 78 Issue: 20 Article Number: 201404 Published: NOV 2008
 

Ang PK, Chen W, Wee ATS, KP Loh
Solution-Gated Epitaxial Graphene as pH Sensor
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Volume: 130 Issue: 44 Pages: 14392-+ Published: NOV 5 2008
 

Wang YY, Ni ZH, Yu T, Shen ZX, Wang HM, Wu YH, Chen W, Wee ATS
Raman studies of monolayer graphene: The substrate effect
JOURNAL OF PHYSICAL CHEMISTRY C Volume: 112 Issue: 29 Pages: 10637-10640 Published: JUL 24 2008
 

Ni ZH, Chen W, Fan XF, Kuo JL, Yu T, Wee ATS, Shen ZX
Raman spectroscopy of epitaxial graphene on a SiC substrate
PHYSICAL REVIEW B Volume: 77 Issue: 11 Article Number: 115416 Published: MAR 2008
 

Poon SW, Chen W, Tok ES, Wee ATS
Probing epitaxial growth of graphene on silicon carbide by metal decoration

APPLIED PHYSICS LETTERS 92 (10): 104102 MAR 10 2008

Chen W, Chen S, Qi DC, Gao XY, Wee ATS
Surface transfer p-type doping of epitaxial graphene
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 129 (34): 10418-10422 AUG 29 2007

Chen W, Xu H, Liu L, Gao XY, Qi DC, Peng GW, Tan SC, Feng YP, Loh KP, Wee ATS
Atomic structure of the 6H-SiC(0001) nanomesh
SURFACE SCIENCE 596 (1-3): 176-186 DEC 10 2005

Molecule-Metal Interface

Chen W, Qi DC, Gao XY, Wee ATS
Surface transfer doping of semiconductors (Review)
PROGRESS IN SURFACE SCIENCE Volume: 84 Issue: 9-10 Pages: 279-321 Published: SEP-OCT 2009
 

Chen W, Chen S, Chen S, Huang YL, Huang H, Qi DC, Gao XY, Ma J, Wee ATS
Orientation-controlled charge transfer at CuPc/F16CuPc interfaces
JOURNAL OF APPLIED PHYSICS Volume: 106 Issue: 6 Article Number: 064910 Published: SEP 15 2009
 

Chen W, Qi DC, Huang YL, Huang H, Wang YZ, Chen S, Gao XY, Wee ATS
Molecular Orientation Dependent Energy Level Alignment at Organic-Organic Heterojunction Interfaces
JOURNAL OF PHYSICAL CHEMISTRY C Volume: 113 Issue: 29 Pages: 12832-12839 Published: JUL 23 2009
 

Chen W, Wee ATS
Synchrotron PES and NEXAFS studies of self-assembled aromatic thiol monolayers on Au(111)
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA Volume: 172 Issue: 1-3 Special Issue: Sp. Iss. SI Pages: 54-63 Published: MAY 2009

Huang YL, Chen W, Huang H, Qi DC, Chen S, Gao XY, Pflaum J, Wee ATS
Ultrathin Films of Diindenoperylene on Graphite and SiO2
JOURNAL OF PHYSICAL CHEMISTRY C Volume: 113 Issue: 21 Pages: 9251-9255 Published: MAY 28 2009
 

Huang H, Chen W, Chen S, Qi DC, Gao XY, Wee ATS
Molecular orientation of CuPc thin films on C-60/Ag(111)
APPLIED PHYSICS LETTERS Volume: 94 Issue: 16 Article Number: 163304 Published: APR 20 2009
(also highlighted in Virtual Journal of Nanoscale Science & Technology, May 4, 2009, Volume 19, Issue 18)
 

Huang YL, Chen W, Chen S, Wee ATS
Low-temperature scanning tunneling microscopy and near-edge X-ray absorption fine structure investigation of epitaxial growth of F16CuPc thin films on graphite
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING Volume: 95 Issue: 1 Special Issue: Sp. Iss. SI Pages: 107-111 Published: APR 2009
 

Wang L, Chen W, Wee ATS
Charge transfer across the molecule/metal interface using the core hole clock technique (Review)
SURFACE SCIENCE REPORTS Volume: 63 Issue: 11 Pages: 465-486 Published: NOV 30 2008

Chen W, Huang H, Chen S, Huang YL, Gao XY, Wee ATS
Molecular Orientation-Dependent Ionization Potential of Organic Thin Films
CHEMISTRY OF MATERIALS Volume: 20 Issue: 22 Pages: 70... Published: NOV 25 2008

Qi DC, Gao XY, Wang L, Chen S, Loh KP, Wee ATS
Tailoring the Electron Affinity and Electron Emission of Diamond (100) 2 x 1 by Surface Functionalization Using an Organic Semiconductor
CHEMISTRY OF MATERIALS Volume: 20 Issue: 21 Pages: 68... Published: NOV 11 2008
 

Chen W, Li H, Huang H, Fu YX, Zhang HL, Ma J, Wee ATS

Two-dimensional pentacene : 3,4,9,10-perylenetetracarboxylic dianhydride supramolecular chiral networks on Ag(111)
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Volume: 130 Issue: 37 Pages: 12285-12289 Published: SEP 17 2008

Huang H, Chen W, Wee ATS

Low-temperature scanning tunneling microscopy investigation of epitaxial growth of F16CuPc thin films on Ag(111)
JOURNAL OF PHYSICAL CHEMISTRY C Volume: 112 Issue: 38 Pages: 14913-14918 Published: SEP 25 2008 (featured on journal cover)

Qune LFNA, Akiyama H, Nagahiro T, Tamada K, Wee ATS
Reversible work function changes induced by photoisomerization of asymmetric azobenzene dithiol self-assembled monolayers on gold
APPLIED PHYSICS LETTERS Volume: 93 Issue: 8 Article Number: 083109 Published: AUG 25 2008
(also highlighted in Virtual Journal of Nanoscale Science & Technology, September 8, 2008, Volume 18, Issue 10)
 

Chen W, Zhang HL, Huang H, Chen L, Wee ATS
Self-assembled organic donor/acceptor nanojunction arrays (featured on journal cover)
APPLIED PHYSICS LETTERS Volume: 92 Issue: 19 Article Number: 193301 Published: MAY 12 2008
(also highlighted in Nature Nanotechnology, July 2008, Vol. 3, p.375; Virtual Journal of Nanoscale Science & Technology, May 26, 2008, Volume 17, Issue 21)
 

Chen W, Zhang H, Huang H, Chen L, Wee ATS
Orientationally ordered C-60 on p-sexiphenyl nanostripes on Ag(111)
ACS NANO Volume: 2 Issue: 4 Pages: 693-698 Published: APR 2008
 

Chen W, Huang H, Chen S, Gao XY, Wee ATS
Low-temperature scanning tunneling microscopy and near-edge X-ray absorption fine structure investigations of molecular orientation of copper(II) phthalocyanine thin films at organic heterojunction interfaces
JOURNAL OF PHYSICAL CHEMISTRY C Volume: 112 Issue: 13 Pages: 5036-5042 Published: APR 3 2008

Zhang HL, Chen W, Huang H, Chen L, Wee ATS
Preferential trapping of C-60 in nanomesh voids
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 130 (9): 2720-+ MAR 5 2008

Qune LFNA, Makino K, Tamada K, Chen W, Wee ATS
Selective adsorption of L-tartaric acid on gemini-type self-assembled monolayers
JOURNAL OF PHYSICAL CHEMISTRY C 112 (8): 3049-3053 FEB 28 2008
 

Gao XY, Liu L, Qi DC, Chen S, Wee ATS, Ti OY, Loh KP, Yu X, Moser HO

Water-induced negative electron affinity on diamond (100)
JOURNAL OF PHYSICAL CHEMISTRY C 112 (7): 2487-2491 FEB 21 2008

Chen W, Chen S, Huang H, Qi DC, Gao XY, Wee ATS

Molecular orientation dependent interfacial dipole at the F16CuPc/CuPc organic heterojunction interface
APPLIED PHYSICS LETTERS 92 (6): 063308 FEB 11 2008

Chen L, Chen W, Huang H, Zhang HL, Yuhara J, Wee ATS

Tunable arrays of C-60 molecular chains
ADVANCED MATERIALS 20 (3): 484-+ FEB 4 2008

Huang H, Chen W, Chen L, Zhang HL, Sen Wang X, Bao SN, Wee ATS
Zigzag C-60 chain arrays
APPLIED PHYSICS LETTERS 92 (2): 023105 JAN 14 2008

Zhang HL, Chen W, Chen L, Huang H, Wang XS, Yuhara J, Wee ATS
C-60 molecular chains on a-sexithiophene nanostripes
SMALL 3 (12): 2015-2018 DEC 2007  (also highlighted in Virtual Journal of Nanoscale Science & Technology, January 28, 2008, Volume 17, Issue 4)

Wang L, Chen S, Qi DC,  Gao XY, Wee ATS
Shielding copper atoms by distortion of phthalocyanine ring on Si(111)
SURFACE SCIENCE 601 (18): 4212-4216 SEP 15 2007

Wang L, Chen S, Liu L, Qi DC, Gao XY, Subbiah J, Swaminathan S, Wee ATS
Conformational degree and molecular orientation in rubrene film by in situ x-ray absorption spectroscopy
JOURNAL OF APPLIED PHYSICS 102 (6): Art. No. 063504 SEP 15 2007 (also highlighted in Virtual Journal of Nanoscale Science & Technology, October 1, 2007, Volume 16, Issue 14)

Chen W, Huang H, Chen S, Chen L, Zhang HL, Gao XY, Wee ATS
Molecular orientation of 3,4,9,10-perylene-tetracarboxylic-dianhydride thin films at organic heterojunction interfaces
APPLIED PHYSICS LETTERS 91 (11): Art. No. 114102 SEP 10 2007 (also highlighted in Virtual Journal of Nanoscale Science & Technology, October 1, 2007, Volume 16, Issue 14)

Qi DC, Liu L, Gao XG, Ouyang T, Chen S, Loh KP, Wee ATS
Tuning the electron affinity and secondary electron emission of diamond (100) surfaces by Diels-Alder reaction
LANGMUIR 23 (19): 9722-9727 SEP 11 2007

Qi D, Chen W, Gao X, Wang L, Chen S, Loh KP, Wee ATS
Surface transfer doping of diamond (100) by tetrafluoro-tetracyanoquinodimethane
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 129 (26): 8084+ JUL 4 2007

Chen W, Gao XY, Qi DC, Chen S, Chen ZK, Wee ATS
Surface-transfer doping of organic semiconductors using functionalized self-assembled monolayers
ADVANCED FUNCTIONAL MATERIALS 17 (8): 1339-1344 MAY 21 2007

Wang L, Chen S, Liu L, Qi DC, Gao XY, Wee ATS
Thickness-dependent energy level alignment of rubrene adsorbed on Au(111)
APPLIED PHYSICS LETTERS 90 (13): Art. No. 132121 MAR 26 2007

Wang L, Qi DC, Liu L, Chen S, Gao XY, Wee ATS
Molecular orientation and ordering during initial growth of copper phthalocyanine on Si(111)
JOURNAL OF PHYSICAL CHEMISTRY C 111 (8): 3454-3458 MAR 1 2007

Chen W, Huang C, Gao XY, Wang L, Zhen CG, Qi DC, Chen S, Zhang HL, Loh KP, Chen ZK, Wee ATS
Tuning the hole injection barrier at the organic/metal interface with self-assembled functionalized aromatic thiols
JOURNAL OF PHYSICAL CHEMISTRY B 110 (51): 26075-26080 DEC 28 2006

Wang L, Zhang KQ, Gao XY, Liu XY, Wee ATS
Resonant photoemission study of single-strand deoxyribonucleic acid
APPLIED PHYSICS LETTERS 89 (1): Art. No. 013902 JUL 3 2006 (also highlighted in Virtual Journal of Biological Physics Research, July 15 2006, Volume 12, Issue 2)

Wang L, Liu L, Chen W, Feng YP, Wee ATS
Configuration-dependent interface charge transfer at a molecule-metal junction
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 128 (24): 8003-8007 JUN 21 2006

Chen W, Wang L, Qi DC, Chen S, Gao XY, Wee ATS
Probing the ultrafast electron transfer at the CuPc/Au(111) interface
APPLIED PHYSICS LETTERS 88 (18): Art. No. 184102 MAY 1 2006 (also highlighted in Virtual Journal of Ultrafast Science, June 2006, Volume 5, Issue 6)

Wang L, Chen W, Huang C, Chen ZK, Wee ATS
Ultrafast electron transfer from oligo(p-phenylene-ethynylene)thiol to gold
JOURNAL OF PHYSICAL CHEMISTRY B 110 (2): 674-676 JAN 19 2006

Chen W, Wang L, Huang C, Lin TT, Gao XY, Loh KP, Chen ZK, Wee ATS
Effect of functional group (fluorine) of aromatic thiols on electron transfer at the molecule-metal interface
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 128 (3): 935-939 JAN 25 2006

Surface nanostructures and reconstructions

Zilani MAK, Xu H, Wang XS, Yakovlev N, Wee ATS
Scanning tunneling microscopy study of higher-order Si(100)-c(8 x 8) surface reconstruction
JOURNAL OF PHYSICS-CONDENSED MATTER Volume: 20 Issue: 39 Article Number: 395003 Published: OCT 1 2008

Hayazaki S, Matsui T, Zhang HL, Chen W, Wee ATS, Yuhara J
Formation of bismuth nanodot in (4 x 4) vanadium oxide nanomesh on Pd(111)
SURFACE SCIENCE Volume: 602 Issue: 12 Pages: 2025-2028 Published: JUN 15 2008

Chen W, Chen S, Zhang HL, Xu H, Qi DC, Gao XY, Loh KP, Wee ATS
Probing the interaction at the C-60-SiC nanomesh interface
SURFACE SCIENCE 601 (14): 2994-3002 JUL 15 2007

Chen W, Wee ATS
Self-assembly on silicon carbide nanomesh templates (Review)
JOURNAL OF PHYSICS D-APPLIED PHYSICS 40 (20): 6287-6299 OCT 21 2007

Zilani MAK, Sun YY, Xu H, Peng GW, Feng YP, Wang XS, Wee ATS
Formation and stabilization of Fe-induced magic clusters on Si(111)-(7 x 7) template
SURFACE SCIENCE 601 (12): 2486-2490 JUN 15 2007

Zilani MAK, Xu H, Sun YY, Wang XS, Wee ATS
Adsorption and thermal decomposition of C-60 on Co/Si(111)-7 x 7
APPLIED SURFACE SCIENCE 253 (10): 4554-4559 MAR 15 2007

Chen W, Zhang HL, Xu H, Tok ES, Loh KP, Wee ATS
C-60 on SiC nanomesh
JOURNAL OF PHYSICAL CHEMISTRY B 110 (43): 21873-21881 NOV 2 2006

Zilani MAK, Xu H, Liu T, Sun YY, Feng YP, Wang XS, Wee ATS
Electronic structure of Co-induced magic clusters grown on Si(111)-(7x7): Scanning tunneling microscopy and spectroscopy and real-space multiple-scattering calculations
PHYSICAL REVIEW B 73 (19): Art. No. 195415 MAY 2006

Zilani MAK, Xu H, Wang XS, Wee ATS
Terrace width dependence of cobalt silicide nucleation on Si(111)-(7x7)
APPLIED PHYSICS LETTERS 88 (2): Art. No. 023121 JAN 9 2006

Zilani MAK, Sun YY, Xu H, Liu L, Feng YP, Wang XS, Wee ATS
Reactive Co magic cluster formation on Si(111)-(7x7)
PHYSICAL REVIEW B 72 (19): Art. No. 193402 NOV 2005 

Chen W, Xu H, Loh KP, Wee ATS
Structure of Co deposited 6H-SiC(0001)
SURFACE SCIENCE 595 (1-3): 107-114 DEC 5 2005

Sun YY, Huan ACH, Feng YP, Wee ATS
Reduction of amplitude and wavelength of Friedel oscillation on Na(111) surface
PHYSICAL REVIEW B 72 (15): Art. No. 153404 OCT 2005

Sun YY, Xu H, Feng YP, Huan ACH, Wee ATS
Rule for structures of open metal surfaces
PHYSICAL REVIEW LETTERS 93 (13): Art. No. 136102 SEP 24 2004

Secondary ion mass spectrometry / ion beam modification

Chanbasha AR, Wee ATS
Ultralow-energy SIMS for shallow semiconductor depth profiling
APPLIED SURFACE SCIENCE Volume: 255 Issue: 4 Pages: 1307-1310 Published: DEC 15 2008

Chanbasha AR, Wee ATS
Surface transient effects in ultralow-energy Cs plus sputtering of Si
SURFACE AND INTERFACE ANALYSIS 39 (5): 397-404 MAY 2007
 
Chanbasha AR, Wee ATS
Depth resolution studies in SiGe delta-doped multilayers using ultralow-energy Cs+ secondary ion mass spectrometry
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B 25 (1): 277-285 JAN-FEB 2007

Tan SK, Liu R, Sow CH, Wee ATS
Self-organized nanodot formation on InP(100) by oxygen ion sputtering
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 248 (1): 83-89 JUL 2006

Tan SK, Wee ATS
Self-organized nanodot formation on InP(100) by argon ion sputtering at normal incidence
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B 24 (3): 1444-1448 MAY-JUN 2006

Chanbasha AR, Wee ATS
Depth resolution studies in SiGe delta-doped multilayers using ultralow-energy O-2(+) secondary-ion-mass spectrometry
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B 24 (2): 547-553 MAR-APR 2006

Chanbasha AR, Wee ATS
Surface transient effects in ultralow-energy O-2(+) sputtering of silicon
SURFACE AND INTERFACE ANALYSIS 37 (7): 628-632 JUL 2005

Yeo KL, Wee ATS, Chong YF
Evaluation of back-side secondary ion mass spectrometry for boron diffusion in silicon and silicon-on-insulator substrates
JOURNAL OF APPLIED PHYSICS 96 (7): 3692-3695 OCT 1 2004

Tan SK, Yeo KL, Wee ATS
In situ XPS and SIMS analysis of O-2(+) beam-induced silicon oxidation
SURFACE AND INTERFACE ANALYSIS 36 (7): 640-644 JUL 2004

Nanoparticles & Nanopatterning

Xie XN, Gao XY, Qi DC, Xie YL, Shen L, Yang SW, Sow CH, Wee ATS
Chemically Linked AuNP - Alkane Network for Enhanced Photoemission and Field Emission
ACS NANO Volume: 3 Issue: 9 Pages: 2722-2730 Published: SEP 2009

Xie XN, Xie YL, Gao XY, Sow CH, Wee ATS
Metallic Nanoparticle Network for Photocurrent Generation and Photodetection
ADVANCED MATERIALS Volume: 21 Issue: 29 Pages: 3016-+ Published: AUG 7 2009
(highlighted in NPG Asia Materials website, see: http://www.natureasia.com/asia-materials/highlight.php?id=501)

Xie XN, Gao XY, Wang YZ, Wang JZ, Loh KP, Wee ATS
Negative differential resistance based on electron injection/extraction in conducting organic films
APPLIED PHYSICS LETTERS Volume: 95 Issue: 6 Article Number: 063301 Published: AUG 10 2009

Xie XN, Chung HJ, Bandyopadhyay D, Sharma A, Sow CH, Bettiol AA, Wee ATS
Two coexisting modes in field-assisted AFM nanopatterning of thin polymer films
MACROMOLECULAR CHEMISTRY AND PHYSICS Volume: 209 Issue: 13 Pages: 1358-1366 Published: JUL 3 2008

Xie XN, Chung HJ, Bandyopadhyay D, Sharma A, Sow CH, Wee ATS
Micro/nanoscopic patterning of polymeric materials by atomic force microscope assisted electrohydrodynamic nanolithography
JOURNAL OF APPLIED PHYSICS 103 (2): 024307 JAN 15 2008

Xie XN, Chung HJ, Sow CH, Wee ATS
Enhanced probe nano-oxidation by charge pump effect in swept tip voltage cycles
APPLIED PHYSICS LETTERS 91 (24): Art. No. 243101 DEC 10 2007

Xie XN, Chung HJ, Tong DM, Sow CH, Wee ATS
Field-induced meniscus dynamics and its impact on the nanoscale tip-surface interface
JOURNAL OF APPLIED PHYSICS 102 (8): Art. No. 084313 OCT 15 2007

Xie XN, Chung HJ, Liu ZJ, Yang SW, Sow CH, Wee ATS
A new scenario in probe local oxidation: Transient pressure-wave-assisted ionic spreading and oxide pattern formation
ADVANCED MATERIALS 19 (18): 2618+ SEP 17 2007

Xie XN, Chung HJ, Sow CH, Wee ATS
Microdroplet and atomic force microscopy probe assisted formation of acidic thin layers for silicon nanostructuring
ADVANCED FUNCTIONAL MATERIALS 17 (6): 919-926 APR 16 2007

Xie XN, Chung HJ, Sow CH, Wee ATS
Nanoscale materials patterning and engineering by atomic force microscopy nanolithography (Review)
MATERIALS SCIENCE & ENGINEERING R-REPORTS 54 (1-2): 1-48 NOV 1 2006