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小木蟲(金幣+0.5):給個紅包，謝謝回帖交流
wandaohzl:鼓勵交流 2011-01-07 10:01:40
a special type of ultra-small gold nanoparticles (<2 nm core diameter) protected by thiolate ligands, so-called gold nanoclusters (or clusters for short).
Of special note, herein we reserve the term “gold nanoclusters” or “gold clusters” for those ultra-small gold nanoparticles that exhibit a discrete electronic structure (as opposed to the quasicontinuous band structure in Au nanocrystals). Many researchers have, instead, used the same terminology to cover the entire size range of Au nanoparticles from 1 to 100 nm, such as in the classic book by Kreibig and Vollmer.8 These authors used terms “very small clusters” to refer to 2–20 atoms, “small clusters” (20–500 atoms), and “l(fā)arge clusters” (500–107 atoms). We thought that the special range of subnanometre to 2 nm for gold nanoparticles may deserve a special term to describe them, as these ultra-small nanoparticles are vastly different to larger Au nanoparticles in terms of atomic packing, electronic structure, magnetism, electrochemical and charge transport properties. The non-unified nomenclature may confuse new practitioners in the field.
http://www.rsc.org/delivery/_Art ... 9nr00160c&Iss=3
[ Last edited by weihui_cn on 2011-1-7 at 01:23 ] |
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