Ivan Kempson - Shape-Controlled Synthesis of Silver Nanocrystals by X‑ray Irradiation for Inkjet Printing

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      Publication Details (including relevant citation   information):

      Hsien-Tse Tung, In-Gann Chen, Ivan M Kempson, Jenn-Ming Song,   Yu-Feng Liu, Po-Wei Chen, Weng-Sing Hwang, Yeukuang Hwu,   Shape-Controlled Synthesis of Silver Nanocrystals by X‑ray   Irradiation for Inkjet Printing, ACS Applied Materials and   Interfaces, 2012, dx.doi.org/10.1021/am3015718


      A suite of silver (Ag) nanocrystals have been synthesized using a   rapid water radiolysis approach via X-ray irradiation. Various   shapes including spheroidal, prism, rod, and multifaceted   nanoparticles can be produced by varying the initial   concentration of polyvinylpyrrolidone (PVP) relative to silver   nitrate (AgNO3). UV−visible spectroscopy and transmission   electron microscopy (TEM) coupled with selected area electron   diffraction (SAED) have been used to characterize these Ag   products. At an optimized reagent ratio, a mixture of   high-aspect-ratio rods (tunable to ∼50) and spheroidal particles   result. Such a mixture is proven to have highly beneficial   melting point and dispersive properties suited to inkjet printing   of conductive Ag lines. The resistivity of the printed lines   decreases to 77.7 μΩ and 33.1 μΩ after heating to 200 and 350 °C.

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