Discarded electronic devices, such as cell phones, are a rapidly increasing source of waste. One solution to the problem is employing components derived from renewable resources that are easily disposed of. Scientists have now built a prototype circuit board composed of sheet paper with completely integrated electrical components that can be burned or left to degrade.
印刷在纸上的电子电路可能是单使用电子设备的更灵活和可倾斜的选择。图片来源：改编自ACS应用材料和界面，2022。欧洲杯足球竞彩
The study was published in theACSApplied Materials & Interfaces杂志。
Most small electronic gadgets use circuit boards comprised of glass fibers, resins, and metal wiring. Because these boards are difficult to recycle and bulky, they are unsuitable for use in point-of-care medical devices, environmental monitoring, or personal wearable gadgets.
Paper-based circuit boards, for example, should be simpler to dispose of, less costly, and more adaptable. On the other hand, current possibilities require specialist paper or just regular metal circuitry components put onto a sheet of paper. Choi and co-workers instead aimed to create circuitry that was easy to build and had all of the electronic components entirely integrated into the sheet.
The group created an amplifier-style circuit using resistors, capacitors, and a transistor printed on paper. They began by printing channels in a straightforward pattern using wax onto paper.
研究人员打印了半导体和导电油墨，在熔化蜡后将其浸透的部分浸泡在未被蜡阻塞的部分中，从而将其浸入纸张中。科学家将更具导电的金属零件打印，并施放一个用凝胶制成的电解质。
电阻，电容器和晶体管设计在测试中都令人满意地发挥作用。即使添加了组件，成品电路也非常灵活且薄，类似于纸张。
To illustrate the circuit’s degradability, the researchers set fire to the entire device, swiftly burning to ash. According to the experts, this is a step toward making fully disposable electrical gadgets.
国家科学基金会为研究人员提欧洲杯线上买球供了资金。
期刊参考
M. Landers，等. (2022) Integrated Papertronic Techniques: Highly Customizable Resistor, Supercapacitor, and Transistor Circuitry on a Single Sheet of Paper.ACS应用材料和界面欧洲杯足球竞彩.doi.org/10.1021/acsami.2c13503.
来源：https://www.acs.org/content/acs/en.html