Photothermal conversion
behavior has a vital application to disease
therapy, water purification, or uncontacted heaters. The fabrication
of high-performance photothermal conversion materials especially for
near-infrared (NIR) light and microstructures has attracted a great
deal of attention. Among numerous substances, MXene as a new type
of 2D material with semi-metallic and unique electromagnetic properties
presents a broader absorption of light and even a typical plasmonic
absorption near the NIR-I area (808 nm), which has made it suitable
for photothermal conversion. Here, we propose a facile approach for
preparing a Ti3C2T
x
/ionic liquid ink with a high photothermal conversion efficiency.
The as-prepared ink has showed good wettability of various substrates
as well as the high sensitivity of 808 nm NIR light irradiation and
a wide range of thermal variation. After packing the ink into a gel
pen refill, the flexible thermal chips could be easily obtained just
by pen writing on the soft surface with the designed size, which also
have become an optimal candidate for the thermal alarm system.
Conductive microwrinkles present a superior performance in ultrasensitive sensing, smart controlling, as well as energy conservation because of their unique structures. These wrinkles are usually prepared by the deposition of a thin conductive stiff layer on a soft substrate under a certain strain. However, traditional conductive materials may encounter some deficiencies, such as fragility or poor dispersity, in any solvent. To promote the applicability of conductive microwrinkles, here, we adopt a new twodimensional nanomaterial Ti 3 C 2 T x MXene as the conductive stiff layer to construct the microwrinkles. By combining the spraying and inflating techniques, the hierarchical complex and delicate Ti 3 C 2 T x −polyurethane (Ti 3 C 2 T x −PU) microwrinkles have become facilely available. The characteristic wavelength and amplitude of the microwrinkles could be easily adjusted by altering the inflating height of the PU film or the spraying volume of the Ti 3 C 2 T x solution. Because the as-prepared Ti 3 C 2 T x wrinkles could sensitively generate deformation inducing a resistance change under a force, these structures are also assembled to detect the applied force. The Ti 3 C 2 T x force sensors showed quick response to a tiny force and stable reliability over hundreds of cycles, which hold a promising potential to monitor or employ the microforce.
Highly ordered structures in nature show a unique ability in operating the light propagation. Among them, the micro-honeycomb arrays are attractive for their advantages in collecting light or enlarging view...
Lead zirconate titanate (PZT) ceramics possess great potential for practical applications and thus improving their piezoelectric properties is crucial. Pb[Formula: see text]Sm[Formula: see text]Ba[Formula: see text]Zr[Formula: see text]Ti[Formula: see text]O3 (PSBZT) ceramics with high Curie temperature and excellent piezoelectric properties were fabricated via a conventional solid-state method, and the effect of Ba[Formula: see text] doping on the structural, dielectric, piezoelectric and ferroelectric properties was studied in detail. It is shown that doping of Ba[Formula: see text] significantly enhanced the piezoelectric properties of PSZT, the maximum [Formula: see text]533 pC/N and [Formula: see text][Formula: see text]361[Formula: see text]C at [Formula: see text] = 0.02 were acquired. Furthermore, PSZT and PSBZT ceramics were used to prepare single element ultrasonic transducers, and their performance were compared and evaluated. The results demonstrate that the PSBZT ceramic-based transducer possesses better sensitivity and bandwidth than the PSZT ceramic-based transducer.
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