{"id":2340,"date":"2026-09-28T01:17:00","date_gmt":"2026-09-27T16:17:00","guid":{"rendered":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-28-light-charged-filter-en\/"},"modified":"2026-09-28T01:17:00","modified_gmt":"2026-09-27T16:17:00","slug":"2026-09-28-light-charged-filter-en","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-28-light-charged-filter-en\/","title":{"rendered":"A light-recharged electrostatic filter retained performance for three months"},"content":{"rendered":"

2026-09-28 01:17 KST<\/strong><\/p>\n

The team reports that overcast daylight and indoor LEDs supplied enough energy to recharge the filter. Tests indicated N95- and N99-level particle efficiency and reuse over hundreds of cycles.<\/p>\n

Electrostatic filters can lose charge with moisture, contamination and time. The design uses light to restore its field and slow that decline.<\/p>\n

What is different<\/h2>\n

Instead of relying only on a high-voltage corona system, the material itself gains charge from light and attracts particles. Low-energy indoor lighting is the notable feature.<\/p>\n

What 99% and 95% mean<\/h2>\n

They are fractions of the filter\u2019s own maximum efficiency retained over time, not a universal statement that 99% of every particle size was removed. Flow, humidity and pollutant type can change results.<\/p>\n

\"A
This AI-generated image explains the topic; it is not a photograph of an actual event, observation or field site.<\/figcaption><\/figure>\n

Is it ready as a mask<\/h2>\n

Researchers built prototypes, but mass production and self-cleaning need work. Breathing resistance, face seal, safety and national certification remain separate tests.<\/p>\n

What must be tested next<\/h2>\n

Long exposure to dust, oils and humidity, repeated cleaning and any electrical by-products need evaluation, followed by real-room and worn-mask comparisons.<\/p>\n

Primary source and independent checks<\/h2>\n

Primary source: Chem paper<\/a><\/p>\n

Institutional explanation: Cell Press research release<\/a><\/p>\n

Independent check: Chem article record<\/a><\/p>\n

Read in other languages<\/h2>\n

\ud55c\uad6d\uc5b4<\/a> \u00b7 English<\/a> \u00b7 Espa\u00f1ol<\/a> \u00b7 \u65e5\u672c\u8a9e<\/a> \u00b7 Ti\u1ebfng Vi\u1ec7t<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

An experimental filter that restores surface charge with light retained 99% of its maximum filtration efficiency after one month and 95% after the next two. This does not establish certification, fit or infection prevention for a commercial mask.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2340","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/2340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing"}],"about":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/types\/briefing"}],"wp:attachment":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=2340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}