Green flexible electronics based on starch

Abstract

Flexible electronics (FEs) with excellent flexibility or foldability may find widespread applications in the wearable devices, artificial intelligence (AI), Internet of Things (IoT), and other areas. However, the widely utilization may also bring the concerning for the fast accumulation of electronic waste. Green FEs with good degradability might supply a way to overcome this problem. Starch, as one of the most abundant natural polymers, has been exhibiting great potentials in the development of environmental-friendly FEs due to its inexpensiveness, good processability, and biodegradability. Lots of remarks were made this field but no summary was found. In this review, we discussed the preparation and applications of starch-based FEs, highlighting the role played by the starch in such FEs and the impacts on the properties. Finally, the challenge was discussed and the outlook for the further development was also presented.

Zinc hybrid sintering for printed transient sensors and wireless electronics

“…electronic components and devices that fully degrade in a given environment without generating harmful byproducts 1,2 , show potential in reducing electronic waste [3][4][5] , and enable novel bioresorbable implants, eliminating the need for a re-operation [6][7][8] . Different materials such as dissolvable metals [9][10][11] , degradable semi-conductors 2,12,13 , substrates and dielectrics [14][15][16][17][18] have been proposed. These developments have led to various devices being demonstrated, including batteries [19][20][21] , heaters 22,23 , transistors 24,25 , energy harvesters 26,27 , as well as pressure [28][29][30] , strain 31 , and temperature sensors 32 .…”

Highly Scalable, Flexible, and Frequency Reconfigurable Millimeter‐Wave Absorber by Screen Printing VO2 Switch Array onto Large Area Metasurfaces

“…In particular, owing to increasing operating frequency such as five-generation (5G) millimeter (mm) wave and 6G sub-terahertz (THz) band, [1][2][3] RF devices aim for human-centric environments beyond curved or conformal environments such as wearable, [4][5][6][7][8] bio RF electronics, [9][10][11][12] and internet of things sensors. [11][12][13][14][15][16] Reconfigurable RF devices are required to realize compact size, cost-effectiveness, and multifunctionality. [17][18][19][20][21][22][23][24][25] Highly scalable RF devices, such as antenna arrays, or reconfigurable intelligent surfaces (RISs) are essential to improve directivity or electromagnetic wave path control, particularly for 5G mmwave or 6G sub-THz applications.…”

Degradable MXene-Doped Polylactic Acid Textiles for Wearable Biomonitoring

“…To this end, degradable bio-based materials such as silk fibroin, , starch, , and cellulose , have been exploited for fabricating wearable electronics. However, the brittleness of silk fibroin films remarkably restrains its further integration and miniaturization, while starch films suffer from meager mechanical properties . Meanwhile, because of the large surface area of cellulose nanofibrils, the exterior hydroxyl groups easily form hydrogen bonds and render agglomerations.…”

“…However, the brittleness of silk fibroin films remarkably restrains its further integration and miniaturization, 31 while starch films suffer from meager mechanical properties. 32 Meanwhile, because of the large surface area of cellulose nanofibrils, the exterior hydroxyl groups easily form hydrogen bonds and render agglomerations. The agglomerate nanofibril films are difficult to functionalize, which hinders their industrialization and commercialization.…”