Advanced Materials Technologies最新文献

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.

Non-Contact Transfer Printing

In article number 2400465, Jizhou Song, Fuxing Miao, and co-workers report a simple design of ultrasonic droplet stamp featuring a water droplet on an acoustic resonator attached to a glass sheet. The designed stamp enables a gentle and conformal contact without ultrasound for reliable pickup and an ejection of a sub-droplet via Rayleigh instability with ultrasound for efficient non-contact printing.

Atomic Layer Deposition Films

Resistive random-access memory (RRAM) is a promising technology because of its ease of operation, high speed, affordability, and stability, particularly at nanoscale device sizes. In article number 2301762, Robert Zierold an o-workers show that atomic layer deposition is ideal for RRAM fabrication due to its ability to control oxygen vacancies and enables multiple-layer stacking, with potential applications in information storage and neural networks.

All-Printed Light Emitting Devices

Three-dimensional printing enables seamless integration of all-printed light emitting devices on diverse substrates. In article number 2302190, Yong Ho Park, Jaeyeon Pyo, and co-workers fabricate electrochemiluminescence devices through direct ink writing of ruthenium complex emitting layer, silver, and graphene electrodes. This approach realizes direct implementation of light emitting devices on virtually any substrate, including polyimide films for flexible operation.

Nanocellulose Aerogel Acoustical Materials

In article number 2400232, Bhisham Sharma, Dong Lin, and co-workers presents a novel 3D printing method for cellulose nanocrystal aerogels, enhancing their effectiveness in noise reduction. By manipulating pore orientations, the printed aerogels demonstrate superior sound absorption and transmission loss compared to conventional materials. This innovative approach lays the groundwork for sustainable, customizable porous materials with applications in multifunctional noise reduction.

Biocompatible Conductive Inks

In article number 2302163, Seungae Lee and Euiseok Jeong develop biocompatible and UV-cross-linkable conductive inks for implantable bioelectronics by grafting polypyrrole on biopolymers. The figure extending from the top to the center of the cover image represents polymerization of pyrrole on sericin extracted from cocoons. The figure at bottom and the image of neurons in the background illustrate conductive inks are applied to implantable biosensor.