Advanced Materials Technologies最新文献

Microactuators

In article number 2400690, Vitaly B. Svetovoy, Ilia V. Uvarov, and Pavel S. Shlepakov present a fast electrochemical actuator with a volume of 3 nanoliters. It generates a force of up to 0.5 Newtons through hydrogen and oxygen internal combustion inside the microchamber.

Femtosecond Laser Nanomachining

In article number 2400240, Rebeca Martínez Vázquez, Pasquale Barbato, and Roberto Osellame present a novel fabrication regimen that is exploited to break the micrometer resolution limit of femtosecond laser micromachining in glass, by demonstrating long-empty channels with nanometric diameter. The irradiation and etching conditions give rise to unprecedented light-matter interaction outcomes that are explored thoroughly in this work. This process will pave the way for a remarkable advance in integrated nanophotonics and nanofluidics.

Helical Antennas

In article number 2400503, Xiaochen Chen, Wen Huang, and co-workers present helical antennas that can be manufactured on wafers, which can form arrays to transmit signals in the terahertz band with high gain.

Solar Steam Generator

In article number 2400175, Sangmin Jeon and Jihun Choi develop a novel solar steam generator, featuring divergent microchannels, through directional freezing of a polypyrrole–cellulose nanofiber suspension in an inverted frustum mold. The microchannels, which extend from the bottom to the top and side surfaces with gradually increasing diameters, promote water transport to both surfaces, leading to highly efficient and salt-resistant brine evaporation.

Acoustic Tweezers

In article number 2400564, Jiangtao Cheng, Y. Albert Pan, Zhenhua Tian, and co-workers present robot-assisted airborne acoustic vortex tweezers that enable contactless, multi-mode, programmable object manipulation. These capabilities include trapping, repelling, and spinning particles, translating particles along complex paths, guiding particles around barriers, and translating and rotating droplets containing zebrafish larvae.

Inkjet Printed Potentiometric Sensors

In article number 2301140, Joseph Andrews and co-workers present a printed electrochemical sensor for measuring nitrate ions in soil. A hydrophilic and porous polymer layer enables the extraction of nitrate laden solutions from soil environments. The sensor is functionalized with a nitrate selective membrane on the working electrode and a proton exchange membrane on the reference electrode.

Hydrogen Leak Detection

In article number 2400441, Karl Mandel and co-workers demonstrate visual hydrogen leak detection using a flexibly applicable powder additive based on micrometer-sized supraparticles. When exposed to hydrogen gas, these supraparticles undergo a pronounced color change that is easily visible to the naked eye within seconds. The color change can be freely customized by supraparticle engineering via spray-drying.

Large Area Ballistocardiography

In article number 2400228, Peter Zalar, Edsger C. P. Smits, and co-workers present printed piezoelectric sensors on plastic and rubber. Through the printing process different arrays of sensors are realized. Enhanced sensitivity of the sensor is observed on rubber substrates. These sensors are used to detect minute forces generated by blood flow enabling contactless heartrate monitoring.