{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T16:43:51Z","timestamp":1777653831433,"version":"3.51.4"},"reference-count":17,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2010,4,12]],"date-time":"2010-04-12T00:00:00Z","timestamp":1271030400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We designed and fabricated a new sensing system which consists of two virtual impactors and two quartz-crystal microbalance (QCM) sensors for measuring particle mass concentration and size distribution. The virtual impactors utilized different inertial forces of particles in air flow to classify different particle sizes. They were designed to classify particle diameter, d, into three different ranges: d &lt; 2.28 \u03bcm, 2.28 \u03bcm \u2264 d \u2264 3.20 \u03bcm, d &gt; 3.20 \u03bcm. The QCM sensors were coated with a hydrogel, which was found to be a reliable adhesive for capturing aerosol particles. The QCM sensor coated with hydrogel was used to measure the mass loading of particles by utilizing its characteristic of resonant frequency shift. An integrated system has been demonstrated.<\/jats:p>","DOI":"10.3390\/s100403641","type":"journal-article","created":{"date-parts":[[2010,4,12]],"date-time":"2010-04-12T11:23:10Z","timestamp":1271071390000},"page":"3641-3654","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["A Miniature System for Separating Aerosol Particles and Measuring Mass Concentrations"],"prefix":"10.3390","volume":"10","author":[{"given":"Dao","family":"Liang","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wen-Pin","family":"Shih","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chuin-Shan","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, National Taiwan University, Taipei 106, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chi-An","family":"Dai","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2010,4,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1484","DOI":"10.1016\/j.jaerosci.2006.05.001","article-title":"Studies on the size distribution, number and mass emission factors of candle particles characterized by modes of burning","volume":"37","author":"Sun","year":"2006","journal-title":"J. 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