防止传染 中国学生设计入围今年戴森奖

香港大学的毕业生 Sum Ming Wong和Kin Pong Li设计了一种门把手，该把手使用光来不断消毒。他们受到2000年严重急性呼吸系统综合症（SARS）爆发事件的影响，认为其“自我消毒门把手”是当前基于化学的清洁方式的有效替代方法。

University of Hong Kong graduates Sum Ming Wong and Kin Pong Li have designed a door handle that uses light to constantly sterilise itself. Motivated by the severe acute respiratory syndrome (SARS) outbreak in the 2000s, Sum and Kin described their "self-sanitising door handle" as a more effective alternative to current chemical-based cleaning processes.

门把手由两端均带有铝盖的玻璃管组成，表面覆盖有一层光催化涂层，该涂层由被磨成细粉的一种称为二氧化钛的矿物制成。玻璃管上的这种薄薄的涂层能够通过紫外线激发的化学反应分解细菌。

Comprised of a glass tube with aluminium caps at each end, the door handle is covered in a photocatalytic coating made from a mineral called titanium dioxide, which is ground into a fine powder. This thin coating on the glass tube is able to decompose bacteria via a chemical reaction that is activated by UV light.

把手由内部发电机提供动力，该发电机将门打开和关闭的频繁运动产生的动能转换为光能，以保持紫外线不断发光。

The light-sterilisation principle is the same as that at work in the LARQ water bottle, which contains a UV light in the lid.

两位设计师受到2003年SARS疫情的很大震动，该病在全球感染了8,000多人，造成700多人死亡，其中大部分在中国内地和香港地区。他们说：“它在我们中国感染了数千人，数百人丧生，最后人们开始意识到公共卫生的重要性。”

The two designers were particularly driven by the SARS outbreak of 2003, which infected more than 8,000 people worldwide and caused more than 700 deaths, the majority of them in China（including Hong Kong）. "It infected thousands and killed hundreds here, and people started to notice the importance of public health as a result." they said.

正如Sum和Kin解释的那样，公共门把手是细菌繁殖的热点，尤其是在洗手间等场所。他们补充说：“我们知道许多感染可以通过接触传播，例如SARS，MERS，口蹄疫和耳道假丝酵母菌（超级真菌）。”二人说：“如今，人们使用化学清洁材料来清洁公共场所，但它既容易被擦拭掉，又对人体有害。但我们的设计具有很高的耐久性，并且是有效的。”

As Sum and Kin explain, public door handles are hotspots for bacteria, particularly on sites like restrooms. "We knew that many infections can spread out by contact, for example, SARS, MERS, Foot and Mouth Disease and Candida auris." they added. "Nowadays, people use chemical cleaning materials to clean up public areas, but it is both easy to wipe off and harmful to the human body," said the duo. "Our design has high durability and [is] effective."

这种新开发的杀菌设计在实验室测试中销毁了约99.8％的微生物。

The designers' newly developed germ-killing design destroyed around 99.8 percent of microbes during lab tests.

自我消毒门把手是2019年詹姆斯•戴森奖（James Dyson Awards）的入围作品之一，该奖项表彰了全球最佳的学生设计和工程学。现在，该设计正处于最后的国际竞争中，对手有英国的MarinaTex生物塑料等发明设计。

The self-sanitising door handle was one of the winning entries in the 2019 James Dyson Awards, which recognise the best in student design and engineering around the world. The design is now under consideration in the final, international round of the competition, where it is up against inventions such as the UK's MarinaTex bioplastic.

在去年的詹姆斯•戴森奖（James Dyson Awards）中，大奖获得者是英国的Nicolas Orellana和Yaseen Noorani，他们发明了O型风力涡轮机，用于狭窄的城市环境之中。

In last year's James Dyson Awards, the grand prize winners were the UK team of Nicolas Orellana and Yaseen Noorani, who invented the O-Wind Turbine for cramped urban environments.