Shape-controlled synthesis of silver nanocrystals by X-ray irradiation for inkjet printing.
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.
Institute of Physics, Academia Sinica, Taipei, Taiwan.
Hsien-Tse
HT
Tung
In-Gann
IG
Chen
Ivan M
IM
Kempson
Jenn-Ming
JM
Song
Yu-Feng
YF
Liu
Po-Wei
PW
Chen
Weng-Sing
WS
Hwang
Yeukuang
Y
Hwu
D016287:Computer Peripherals; D003460:Crystallization / Q000379:methods*; D007281:Ink; D046911:Macromolecular Substances / Q000737:chemistry / Q000528:radiation effects; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D010316:Particle Size; D012834:Silver / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties / Q000528:radiation effects; D014965:X-Rays
D046911:Macromolecular Substances; D012834:Silver