3 research outputs found
A Family of Carbon-Based Nanocomposite Tubular Structures Created by <i>in Situ</i> Electron Beam Irradiation
We report a unique approach for the fabrication of a family of curling tubular nanostructures rapidly created by a rolling up of carbon membranes under <i>in situ</i> TEM electron beam irradiation. Multiwall tubes can also be created if irradiation by electron beam is performed long enough. This general approach can be extended to curve the conductive carbon film loaded with various functional nanomaterials, such as nanocrystals, nanorods, nanowires, and nanosheets, providing a unique strategy to make composite tubular structures and composite materials by a combination of desired optical, electronic, and magnetic properties, which could find potential applications, including fluid transportation, encapsulation, and capillarity on the nanometer scale
Highly Stimuli-Responsive Au Nanorods/Poly(<i>N</i>‑isopropylacrylamide) (PNIPAM) Composite Hydrogel for Smart Switch
To
achieve both fast response and structural integrity during the repeating
volume changes are the most significant challenges for thermoresponsive
hydrogels. In this work, AuNRs/PNIPAM composite hydrogel with fast
thermal/optical response and structural integrity is facilely prepared
by electrospinning and following a curing treatment. By combining
the photothermal property of AuNRs and thermal-responsive effect of
PNIPAM, the composite hydrogel shows fast thermal/photoresponse, high
heating rate, and high structural integrity with fierce size change.
When laser irradiation begins, the temperature of the film increases
from room temperature to 34.5 °C in 1 s and will further increase
even to 60 °C in 5 s. Both the porous structure of the hydrogel
and the assemble effect of AuNRs within the PNIPAM fibers facilitate
the fast responsibility. Furthermore, to take advantage of this fibrous
hydrogel adequately, one novel kind of thermal/photocontrolled switch
based on the composite hydrogel is prepared, which exhibits fast responsivity
and high stability even under acidic or basic conditions
Highly Stimuli-Responsive Au Nanorods/Poly(<i>N</i>‑isopropylacrylamide) (PNIPAM) Composite Hydrogel for Smart Switch
To
achieve both fast response and structural integrity during the repeating
volume changes are the most significant challenges for thermoresponsive
hydrogels. In this work, AuNRs/PNIPAM composite hydrogel with fast
thermal/optical response and structural integrity is facilely prepared
by electrospinning and following a curing treatment. By combining
the photothermal property of AuNRs and thermal-responsive effect of
PNIPAM, the composite hydrogel shows fast thermal/photoresponse, high
heating rate, and high structural integrity with fierce size change.
When laser irradiation begins, the temperature of the film increases
from room temperature to 34.5 °C in 1 s and will further increase
even to 60 °C in 5 s. Both the porous structure of the hydrogel
and the assemble effect of AuNRs within the PNIPAM fibers facilitate
the fast responsibility. Furthermore, to take advantage of this fibrous
hydrogel adequately, one novel kind of thermal/photocontrolled switch
based on the composite hydrogel is prepared, which exhibits fast responsivity
and high stability even under acidic or basic conditions