{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:35:41Z","timestamp":1760243741290,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2012,10,18]],"date-time":"2012-10-18T00:00:00Z","timestamp":1350518400000},"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>A passive pump consisting of integrated vertical capillaries has been developed for a microfluidic chip as an useful component with an excellent flow volume and flow rate. A fluidic chip built into a passive pump was used by connecting the bottoms of all the capillaries to a top surface consisting of a thin layer channel in the microfluidic chip where the thin layer channel depth was smaller than the capillary radius. As a result the vertical capillaries drew fluid cooperatively rather than independently, thus exerting the maximum suction efficiency at every instance. This meant that a flow rate was realized that exhibited little variation and without any external power or operation. A microfluidic chip built into this passive pump had the ability to achieve a quasi-steady rather than a rapidly decreasing flow rate, which is a universal flow characteristic in an ordinary capillary.<\/jats:p>","DOI":"10.3390\/s121014053","type":"journal-article","created":{"date-parts":[[2012,10,18]],"date-time":"2012-10-18T13:00:46Z","timestamp":1350565246000},"page":"14053-14067","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Cooperative Suction by Vertical Capillary Array Pump for Controlling Flow Profiles of Microfluidic Sensor Chips"],"prefix":"10.3390","volume":"12","author":[{"given":"Tsutomu","family":"Horiuchi","sequence":"first","affiliation":[{"name":"NTT Microsystem Integration Laboratories, Nippon Telegraph and Telephone Corporation (NTT), Morinosato-Wakamiya, Atsugi-shi, Kanagawa 2430198, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katsuyoshi","family":"Hayashi","sequence":"additional","affiliation":[{"name":"NTT Microsystem Integration Laboratories, Nippon Telegraph and Telephone Corporation (NTT), Morinosato-Wakamiya, Atsugi-shi, Kanagawa 2430198, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michiko","family":"Seyama","sequence":"additional","affiliation":[{"name":"NTT Microsystem Integration Laboratories, Nippon Telegraph and Telephone Corporation (NTT), Morinosato-Wakamiya, Atsugi-shi, Kanagawa 2430198, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Suzuyo","family":"Inoue","sequence":"additional","affiliation":[{"name":"NTT Microsystem Integration Laboratories, Nippon Telegraph and Telephone Corporation (NTT), Morinosato-Wakamiya, Atsugi-shi, Kanagawa 2430198, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emi","family":"Tamechika","sequence":"additional","affiliation":[{"name":"NTT Microsystem Integration Laboratories, Nippon Telegraph and Telephone Corporation (NTT), Morinosato-Wakamiya, Atsugi-shi, Kanagawa 2430198, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2012,10,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Laser, D., and Santiago, J. 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