Review on flexible photonics/electronics integrated devices and fabrication strategy

Abstract

In recent years, to meet the greater demand for next generation electronic devices that are transplantable, lightweight and portable, flexible and large-scale integrated electronics attract much more attention have been of interest in both industry and academia. Organic electronics and stretchable inorganic electronics are the two major branches of flexible electronics. With the semiconductive and flexible properties of the organic semiconductor materials, flexible organic electronics have become a mainstay of our technology. Compared to organic electronics, stretchable and flexible inorganic electronics are fabricated via mechanical design with inorganic electronic components on flexible substrates, which have stretchability and flexibility to enable very large deformations without degradation of performance. This review summarizes the recent progress on fabrication strategies, such as hydrodynamic organic nanowire printing and inkjet-assisted nanotransfer printing of flexible organic electronics, and screen printing, soft lithography and transfer printing of flexible inorganic electronics. In addition, this review considers large-scale organic and inorganic flexible electronic systems and the future applications of flexible and stretchable electronics.

Climbing-inspired twining electrodes using shape memory for peripheral nerve stimulation and recording

“…2Jand movie S2 demonstrates the selfclimbing processes of the twining electrode in an in vitro experiment. We performed the electrical conductivity tests for the fabricated twining electrodes with inner radii of~0.5 mm (~126 ohms) and~1 mm (~119 ohms), as shown in movie S3.Material characterization and structure optimizationUnlike traditional extraneural electrodes(2,31) and most flexible electronics(32)(33)(34)(35)(36)(37), the materials chosen for the insulating substrates of the developed twining electrodes are a class of smart materials, Schematic illustrations of the detailed fabrication process of the twining electrode and images of the self-climbing process. (A and B) Mesh serpentine design of the Au/Ti layer and the PI film, respectively.…”

Flexible inorganic bioelectronics

“…From the perspective of industrialization, the blanks concentrate mainly on the mass production technology as well as the standards which are used to evaluate and assess the springing-up products. 212 The mass production technology includes both fabrication equipment and testing machines, since the current technology cannot be directly used to product flexible and stretchable electronics, especially for biomedical devices. The initial trial has been conducted in Europe in manufacturing transfer printing machine.…”

Flexible Hybrid Electronics for Digital Healthcare

“…Organic electronic materials are the most direct strategy to obtain electronics with flexibility and stretchability that are compatible with flexible substrates and conductive or semiconducting polymers . Since the organic semiconductor material, organic field‐effect transistor, and organic light‐emitting diode (OLED) were first reported in 1977, 1986, and 1987, respectively, organic electronic materials have been widely and extensively investigated for epidermal electronics and displays .…”