{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T04:32:17Z","timestamp":1789446737773,"version":"build-2803163510"},"reference-count":33,"publisher":"Wiley","issue":"14","license":[{"start":{"date-parts":[[2011,6,28]],"date-time":"2011-06-28T00:00:00Z","timestamp":1309219200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Small"],"published-print":{"date-parts":[[2011,7,18]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>In this report the correlation between the solution photoluminescence (PL) quantum yield and the fluorescence emission of individual semiconductor quantum dots (QDs) is investigated. This is done by taking advantage of previously reported enhancement in the macroscopic quantum yield of water\u2010soluble QDs capped with dihydrolipoic acid (DHLA) when self\u2010assembled with polyhistidine\u2010appended proteins, and by using fluorescence coincidence analysis (FCA) to detect the presence of \u201cbright\u201d and \u201cdark\u201d single QDs in solution. This allows for changes in the fraction of the two QD species to be tracked as the PL yield of the solution is progressively altered. The results clearly indicate that in a dispersion of luminescent nanocrystals, \u201cbright\u201d (intermittently emitting) single QDs coexist with \u201cpermanently dark\u201d (non\u2010emitting) QDs. Furthermore, the increase in the fraction of emitting QDs accompanies the increase in the PL quantum yield of the solution. These findings support the idea that a dispersion of QDs consists of two optically distinct populations of nanocrystals\u2014one is \u201cbright\u201d while the other is \u201cdark;\u201d and that the relative fraction of these two populations defines the overall PL yield.<\/jats:p>","DOI":"10.1002\/smll.201100802","type":"journal-article","created":{"date-parts":[[2011,6,30]],"date-time":"2011-06-30T12:57:03Z","timestamp":1309438623000},"page":"2101-2108","source":"Crossref","is-referenced-by-count":22,"title":["Single\u2010Molecule Colocalization Studies Shed Light on the Idea of Fully Emitting versus Dark Single Quantum Dots"],"prefix":"10.1002","volume":"7","author":[{"given":"Thomas","family":"Pons","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Igor L.","family":"Medintz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dorothy","family":"Farrell","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiang","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amy F.","family":"Grimes","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Douglas S.","family":"English","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lorenzo","family":"Berti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hedi","family":"Mattoussi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2011,6,28]]},"reference":[{"key":"e_1_2_7_1_2","first-page":"284","volume-title":"Optical Properties of Semiconductor Nanostructures","author":"Gaponenko S. 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