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The CNLC was coated on a calcium fluoride substrate to measure the spectral transmittance, which was measured to detect the UV\u2010blocking effect of CNLC. The results show that CNLC could reduce UVB (290\u2013320\u2009nm) by 99.9% and UVA (320\u2013400\u2009nm) by 95.6%. The barrier effect of cake\u2010shaped semi\u2010solidified CNLC microspheres was further investigated, and it was found that cake\u2010shaped semi\u2010solidified CNLC microspheres could reduce UVB by 58.2% and UVA by 34.1%. This is due to the chemical absorption property of CNLC, which has UV\u2010absorbing functional groups such as the benzene rings. And the physical reflection properties of CNLC could periodically reflect a certain wavelength of light. Liquid crystal (LC) is a rich set of soft materials with rod\u2010like structures widely existing in nature, which is harmless to the human body and environment. Therefore, using CNLC's function of blocking UV, a new sunscreen can be developed.<\/jats:p>","DOI":"10.1111\/php.13810","type":"journal-article","created":{"date-parts":[[2023,4,13]],"date-time":"2023-04-13T07:55:12Z","timestamp":1681372512000},"page":"33-40","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Excellent ultraviolet\u2010blocking properties of chiral nematic liquid crystals"],"prefix":"10.1111","volume":"100","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-1790-7840","authenticated-orcid":false,"given":"Chaofeng","family":"Qu","sequence":"first","affiliation":[{"name":"Key Lab of In\u2010fiber Integrated Optics, Ministry Education of China Harbin Engineering University  Harbin China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qingxiu","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Lab of In\u2010fiber Integrated Optics, Ministry Education of China Harbin 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