Advanced Materials Technologies最新文献

Light-Emitting Electrochemical Transistors

The cover image illustrates the integration of polyelectrolytes in light-emitting electrochemical transistors (LECTs), showcasing their multifunctional capabilities in electrochemistry and optoelectronics. In article number 2302207, Bright Walker, Han-Ki Kim, Jung Hwa Seo, and co-workers present LECTs that feature a streamlined device architecture enabled by electrochemical doping using poly(9-vinylcarbazole) doped with lithium ions (Li⁺) and copper (II) ions (Cu²⁺). The synergistic effects of these hybrid polyelectrolytes markedly enhance electron-hole recombination efficiency, resulting in bright and efficient electroluminescence.

Artificial Tactile Perception Systems

In article number 2400338, Tingting Zhao, Jianhua Zhang, an co-workers present an artificial tactile perception system capable of sensing, encoding, and learning spatio-temporal information of pressure stimuli. It combines piezoelectric nanogenerators and a multiple-gate synaptic transistor for sensing and processing. Exploiting the modulation capability of the gate electrode positioned variably relative to the channel on the proton migration, the spatial position and time sequence of the applied pressure can be distinguished.

3D-Printed Hydrogel Filters

In article number 2400025, Sonja Salmon, Xiaomeng Fang, and co-workers present a self-supporting hydrogel-based CO₂ filter for gas streams. The macroporous filter immobilizes the enzyme carbonic anhydrase, which converts CO₂ to bicarbonate ions, inside an aqueous crosslinked polymer network through a direct-ink-writing 3D printing technique.

Magnetic Actuators

In article number 2400369, Shengzhi Sun, Yi Zhu, and co-workers propose a fabrication method of a sensor-equipped magnetic actuator (SEMA). The SEMA consists of a magnetic actuator and a temperature-sensitive unit, exhibiting excellent position controlling and temperature monitoring performance. This method of equipping sensors with micro actuators can bring many potential applications in microenvironment sensing, micro-mechanical manipulating, and micro-cargo transporting.

Artificial Synapses

In article number 2400440, Sungjun Kim, Dongyeol Ju, and Jungwoo Lee show that the coexistence of nonfilamentary and filamentary switching in the Pt/TaO_x/TiO_x/TiN device enables the realization of the functions of artificial nociceptors and synapses. Additionally, the linkage between artificial nociceptors and synapses is proposed based on injury-enhanced spike-time-dependent plasticity. This study underscores the potential of memristor in neuromorphic computing, providing a framework for simulating nociceptors, synapses, and learning principles.

Infrared-Transparent Semiconductor Membranes

In article number 2401013, Emma J. Renteria, Francesca Cavallo, and co-workers show that single-crystalline semiconductor membranes can act as shields of millimeter waves while allowing transmission of infrared radiation. These membranes can be used to protect infrared sources and detectors from the harmful effects of radio waves suitable for 5G and 6G communications.

Fast Cure Silicone Inks

In article number 2400423, Anna Guell Izard and co-workers present a silicone gyroid with 80% porosity, 250 µm wall thickness, printed with Fast Cure silicone ink. Fast Cure silicone in direct ink write additive manufacturing enables the acquisition of previously unattainable structures, such as tall or overhanging structures, or structures comprising thin walls. Such structures are obtained thanks to the quick gelling process.

Highly flexible, transparent, and conductive polytetrafluoroethylene (PTFE)/AgPdCu (APC)/indium zinc oxide (IZO) hybrid films are developed for use in transparent and flexible thin-film heaters (FTFHs) integrated into electric vehicles. By controlling the thickness of each layer, PTFE/APC/IZO multilayer electrodes with a low sheet resistance of 9.73 Ω/sq and high transmittance of 80.08% at a wavelength of 550 nm and outstanding mechanical flexibility even though it is prepared at room temperature is obtained. In multilayer electrodes, each component plays a specific role, this is, IZO acts as a transparent barrier, APC is the main conduction path, and PTFE is the adhesive layer. Notably, the optimal PTFE/APC/IZO multilayer exhibited superior mechanical flexibility compared with that of the IZO/Ag/IZO multilayer owing to the soft PTFE adhesive layer. The FTFH with the optimized PTFE/APC/IZO multilayer demonstrated a high saturation temperature of 101.9 °C at a low input voltage of 12 V owing to the low sheet resistance and stability provided by the IZO barrier layer. Therefore, the PTFE/APC/IZO hybrid electrodes prepared via a continuous sputtering process provide an effective strategy for achieving high-performance transparent FTFHs for next-generation electric vehicles.