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Nirmalya K. Chaki
Researcher at National Chemical Laboratory
Publications - 27
Citations - 2518
Nirmalya K. Chaki is an academic researcher from National Chemical Laboratory. The author has contributed to research in topics: Nanoclusters & Monolayer. The author has an hindex of 17, co-authored 27 publications receiving 2369 citations. Previous affiliations of Nirmalya K. Chaki include Indian Institute of Chemical Technology & National Institutes of Natural Sciences, Japan.
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Self-assembled monolayers as a tunable platform for biosensor applications.
TL;DR: It is demonstrated with suitable examples that monolayer design plays a key role in controlling the performance of these SAM based biosensors, irrespective of the immobilisation strategy and sensing mechanism.
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Ubiquitous 8 and 29 kDa gold:alkanethiolate cluster compounds: mass-spectrometric determination of molecular formulas and structural implications.
Nirmalya K. Chaki,Yuichi Negishi,Hironori Tsunoyama,Yukatsu Shichibu,Tatsuya Tsukuda,Tatsuya Tsukuda +5 more
TL;DR: The molecular formulas and charge state distributions of thus-far known ubiquitous alkanethiolate-protected gold clusters with core-masses of 8 and 29 kDa were assessed using electrospray ionization mass spectrometry to propose preferential formation and chemical robustness.
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Biicosahedral Gold Clusters [Au25(PPh3)10(SCnH2n+1)5Cl2]2+ (n = 2−18): A Stepping Stone to Cluster-Assembled Materials
Yukatsu Shichibu,Yuichi Negishi,Takahito Watanabe,Nirmalya K. Chaki,Hiroyuki Kawaguchi,Tatsuya Tsukuda +5 more
TL;DR: The chemical reaction between [Au11(PPh3)8Cl2]- and n-alkanethiol CnH2n+1SH (n = 2, 8, 10, 12, 14, 16, and 18) serendipitously yielded stable Au25 cluster compounds with the formula, [au25(Pph3)10(SCnH 2n+ 1)5Cl2]2] 2.
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Origin of magic stability of thiolated gold clusters: a case study on Au25(SC6H13)18.
TL;DR: It is concluded that electronic shell closing is not a crucial factor for the high stability of [Au25(SC6H13)18]x (x = 1−, 0, 1+) and ascribe magic stability to the core-in-cage structure predicted theoretically.
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Effect of Ag-Doping on the Catalytic Activity of Polymer-Stabilized Au Clusters in Aerobic Oxidation of Alcohol
TL;DR: In this paper, a set of nearly monodisperse Au−Ag alloy clusters (size range 1.6−2.2 nm) with various Ag content (5−30%) was prepared by the co-reduction method in the presence of poly(N-vinyl-2-pyrrolidone) (PVP).