{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-c03aa079.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-517835be.css\" media=\"all\" /\u003e\n\u003cdiv data-title='The Astounding Physics of N95 Masks' data-url='/boclips/videos/673e2a5ca18a850073bf4258' data-video-url='/boclips/videos/673e2a5ca18a850073bf4258' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nThe Astounding Physics of N95 Masks\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"30358008\" href=\"/search?publisher_ids%5B%5D=30358008\"\u003eMinutePhysics\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eThis video was written in collaboration with Aatish Bhatia - To learn more about using \u0026amp; decontaminating N95 masks Thanks to Manu Prakash for useful discussion and feedback (Manu is involved with the N95 decontamination project) The...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eThis video was written in collaboration with Aatish \u003ca href='https://aatishb.com' target='_blank' rel='nofollow'\u003eBhatia -\u003c/a\u003e To learn more about using \u0026 decontaminating N95 \u003ca href='https://www.n95decon.org' target='_blank' rel='nofollow'\u003emasks\u003c/a\u003e Thanks to Manu Prakash for useful discussion and feedback (Manu is involved with the N95 decontamination project) The physics \u0026 engineering of N95 mask design is pretty incredible. REFERENCES 10X efficiency of electrically charged fibers \"The electrostatic charge of N95 masks is a major contributor to their filtration efficiency, improving it at least 10-fold over uncharged fabric\" (Tsai et al., Journal of Electrostatics 2002; Peter Tsai, personal communication). Prakash Lab COVID-19 Response Group Working Draft Document on N95 \u003ca href='https://docs.google.com/document/d/1aACcbkyZjR7nZy_wWeGQ9U2iGy0y4QajBeOL8RqAZIQ/edit' target='_blank' rel='nofollow'\u003emasks\u003c/a\u003e “Electrostatic charge contributes as much as 95% of the filtration efficiency� Molina, A., Vyas, P., Khlystov, N., Kumar, S., Kothari, A., Deriso, D., ... \u0026 Prakash, M. (2020). Project 1000 x 1000: Centrifugal melt spinning for distributed manufacturing of N95 filtering facepiece respirators. arXiv preprint arXiv:2004.\u003ca href='https://arxiv.org/pdf/2004.13494.pdf' target='_blank' rel='nofollow'\u003e13494.\u003c/a\u003e Tsai, P. P., Schreuder-Gibson, H., \u0026 Gibson, P. (2002). Different electrostatic methods for making electret filters. Journal of electrostatics, 54(3-4), 333-\u003ca href='https://www.researchgate.net/profile/Phillip_Gibson/publication/222659741_Different_electrostatic_methods_for_making_electret_filters/links/5a5912cba6fdcc3bfb5ab21e/Different-electrostatic-methods-for-making-electret-filters.pdf' target='_blank' rel='nofollow'\u003e341.\u003c/a\u003e History of Electrets Jefimenko, O. D., \u0026 Walker, D. K. (1980). Electrets. The Physics Teacher, 18(9), 651-\u003ca href='https://aapt.scitation.org/doi/abs/10.1119/1.2340651' target='_blank' rel='nofollow'\u003e659.\u003c/a\u003e Physics of Air Filtration Hinds, W. C. (1999). Aerosol technology: properties, behavior, and measurement of airborne particles. John Wiley \u0026 \u003ca href='https://www.wiley.com/en-us/Aerosol+Technology%3A+Properties%2C+Behavior%2C+and+Measurement+of+Airborne+Particles%2C+2nd+Edition-p-9780471194101' target='_blank' rel='nofollow'\u003eSons.\u003c/a\u003e Scientific consortium for data-driven study of \u003ca href='https://www.n95decon.org/' target='_blank' rel='nofollow'\u003eN95\u003c/a\u003e N95 \u0026 virus particle sizes Bałazy, A., Toivola, M., Adhikari, A., Sivasubramani, S. K., Reponen, T., \u0026 Grinshpun, S. A. (2006). Do N95 respirators provide 95% protection level against airborne viruses, and how adequate are surgical masks?. American journal of infection control, 34(2), 51-\u003ca href='http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.488.4644\u0026rep=rep1\u0026type=pdf' target='_blank' rel='nofollow'\u003e57.\u003c/a\u003e Harnish, D. A., Heimbuch, B. K., Husband, M., Lumley, A. E., Kinney, K., Shaffer, R. E., \u0026 Wander, J. D. (2013). Challenge of N95 filtering facepiece respirators with viable H1N1 influenza aerosols. Infection Control \u0026 Hospital Epidemiology, 34(5), 494-\u003ca href='https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4646082/' target='_blank' rel='nofollow'\u003e499.\u003c/a\u003e Liao, L., Xiao, W., Zhao, M., Yu, X., Wang, H., Wang, Q., ... \u0026 Cui, Y. (2020). \"Can N95 respirators be reused after disinfection? How many times?. ACS \u003ca href='https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7202248/' target='_blank' rel='nofollow'\u003enano.\u003c/a\u003e Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! 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