Please use this identifier to cite or link to this item: https://doi.org/10.1088/0957-4484/23/37/375603
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dc.titleSize-tunable Au nanoparticles on MoS 2(0001)
dc.contributor.authorChu, X.
dc.contributor.authorYao, G.
dc.contributor.authorWee, A.T.S.
dc.contributor.authorWang, X.-S.
dc.date.accessioned2014-10-16T09:41:18Z
dc.date.available2014-10-16T09:41:18Z
dc.date.issued2012-09-21
dc.identifier.citationChu, X., Yao, G., Wee, A.T.S., Wang, X.-S. (2012-09-21). Size-tunable Au nanoparticles on MoS 2(0001). Nanotechnology 23 (37) : -. ScholarBank@NUS Repository. https://doi.org/10.1088/0957-4484/23/37/375603
dc.identifier.issn09574484
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/97955
dc.description.abstractUltra-fine Au nanoparticles (NPs) show great application potential in catalysis. Size-tunable Au NPs have been fabricated on MoS 2 covered with monolayer 3,4,5,10-perylene tetracarboxylic dianhydride (PTCDA), and the morphological evolution as a function of Au deposition amount was investigated using scanning tunneling microscopy (STM). The PTCDA molecules act as a surfactant to stabilize ultra-fine Au NPs. Molecular scale STM images show that on MoS 2 the Au NPs with PTCDA molecules on top can be formed with height and lateral size down to 1.3nm and 3.5nm, respectively. By controlling the deposition amount and annealing temperature, the size of Au NPs can be tuned. After annealing at 270°C to remove PTCDA, Au NPs with a linear size ≤5nm can be obtained on MoS 2(0001), facilitating the characterization of their intrinsic physical and chemical properties using various analytical techniques. In addition, photoemission spectroscopy data reveal charge transfer from Au NPs to PTCDA, indicating that the NPs possess more reactive chemical properties than bulk Au. © 2012 IOP Publishing Ltd.
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1088/0957-4484/23/37/375603
dc.description.sourcetitleNanotechnology
dc.description.volume23
dc.description.issue37
dc.description.page-
dc.description.codenNNOTE
dc.identifier.isiut000308810800012
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