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Sub-micron scale patterning of fluorescent silver nanoclusters using low-power laser.


ABSTRACT: Noble metal nanoclusters are ultrasmall nanomaterials with tunable properties and huge application potential; however, retaining their enhanced functionality is difficult as they readily lose their properties without stabilization. Here, we demonstrate a facile synthesis of highly photostable silver nanoclusters in a polymer thin film using visible light photoreduction. Furthermore, the different stages of the nanocluster formation are investigated in detail using absorption and fluorescence spectroscopy, fluorescence microscopy, and atomic force microscopy. A cost-effective fabrication of photostable micron-sized fluorescent silver nanocluster barcode is demonstrated in silver-impregnated polymer films using a low-power continuous-wave laser diode. It is shown that a laser power of as low as 0.75?mW is enough to write fluorescent structures, corresponding to the specifications of a commercially available laser pointer. The as-formed nanocluster-containing microstructures can be useful in direct labeling applications such as authenticity marking and fluorescent labeling.

SUBMITTER: Kunwar P 

PROVIDER: S-EPMC4820741 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature

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Sub-micron scale patterning of fluorescent silver nanoclusters using low-power laser.

Kunwar Puskal P   Hassinen Jukka J   Bautista Godofredo G   Ras Robin H A RH   Toivonen Juha J  

Scientific reports 20160405


Noble metal nanoclusters are ultrasmall nanomaterials with tunable properties and huge application potential; however, retaining their enhanced functionality is difficult as they readily lose their properties without stabilization. Here, we demonstrate a facile synthesis of highly photostable silver nanoclusters in a polymer thin film using visible light photoreduction. Furthermore, the different stages of the nanocluster formation are investigated in detail using absorption and fluorescence spe  ...[more]

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