Deposition of size-selected nanoclusters assembled from atoms in the gas phase is a novel route to the fabrication of <10nm surface features [1]. I will focus on the creation of monodispersed metal cluster arrays which enable new model catalysts [2,3] and protein biochips [4]. The atomic structure of the clusters � previously the province of theory - is revealed experimentally [5] by aberration-corrected scanning transmission electron microscopy (STEM) in the HAADF imaging regime; we can �count� atoms [6] and obtain 3D information not just 2D projections. Results include mass spectrometry of thiolated Au clusters [7,8], adatom dynamics on Au923 magic-number nanoclusters [9], first atomic imaging results for Au55 and Au20 [10,11] and a method to explore the potential energy landscape of clusters via cluster transformations [12]. A new kind of cluster beam source, to allow super-abundant generation of size-selected nanoclusters, will be proposed.1.    R.E. Palmer, S. Pratontep and H.-G. Boyen, Nature Materials 2  443 (2003).2.    F. Yin, Z.W. Wang and R.E. Palmer, J. Am. Chem. Soc. 133  10325 (2011).3.    F. Yin et al, J. Chem. Phys. 134  141101 (2011).4.    R.E. Palmer and C. Leung, Trends in Biotechnology 25  48 (2007).5.    Z.Y. Li, N.P. Young, M. Di Vece, R.E. Palmer, et al, Nature 451 46 (2008).6.    N.P. Young et al, Phys. Rev. Lett. 101 246103 (2008).7.    Z.W. Wang et al, J. Am. Chem. Soc. 132  2854 (2010); Z.W. Wang et al, Small 7  1542 (2011);S. Malola et al, J. Am. Chem. Soc. 134 19560 (2012).9.    Z.W. Wang and R.E. Palmer, Nano Lett. 12  91 (2012).10.   Z.W. Wang and R.E. Palmer, Nanoscale 4  4947 (2012) [Cover].11.   Z.W. Wang and R.E. Palmer, Nano Lett. 12  5510 (2012).12.   Z.W. Wang and R.E. Palmer, Phys. Rev. Lett. 108  245502 (2012).

Atomic structure and applications of supported, size-selected metal nanoclusters - and prospects for super-abundant production

247th National Meeting (2014)

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