Ag Nanoparticles Decorated
Small-Sized AgTCNQF<sub>4</sub> Nanorod: Synthesis in Aqueous Solution
and Its Photoinduced
Charge Transfer Reactions
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Abstract
A kind of functional noble metal
nanoparticles and metal/organic
semiconductor composite nanomaterials, Ag nanoparticles (AgNPs, 6–10
nm in diameter) decorated small-sized Ag-tetracyano-<i>p</i>-tetrafluoroquinodimethane (AgTCNQF<sub>4</sub>) nanorods (150–400
nm in length and 60–100 nm in diameter), have been successfully
synthesized through a rapid microemulsion reaction between TCNQF<sub>4</sub> molecules and an AgNP colloid under a soft template of poly(ethylene
glycol)-<i>block</i>-poly(propylene glycol)-<i>block</i>-poly(ethylene glycol). The morphology, chemical structure, and elemental
composition of the prepared AgNPs–AgTCNQF<sub>4</sub> composite
nanorods were studied by transmission electron microscopy, selected-area
electron diffraction, and X-ray photoelectron spectroscopy. The real-time
ultraviolet–visible spectroscopy assisted with two-dimensional
correlation spectroscopic analysis was employed to explore the growth
of AgNPs–AgTCNQF<sub>4</sub> composite nanorods in microemulsion.
These composite nanorods display the photoinduced charge transfer
(CT) property from the monoanion (TCNQF<sub>4</sub><sup>–</sup>) to dianion (TCNQF<sub>4</sub><sup>2–</sup>) selectively
under 532 nm light irradiation. The larger content of AgNPs on the
surface of AgTCNQF<sub>4</sub> led to the higher conversion of dianion
due to the plasmon-assisted photocatalysis. This photoelectric composite
material is promising for the applications of light-writing data storage
and photocatalysis