2010
DOI: 10.1021/la103063p
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Chemical Defects in the Highly Fluorescent Conjugated Polymer Dots

Abstract: We present strong evidence for the oxidation of conjugated polymers in the formation of conjugated polymer dots (CPdots) using Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Although recent studies show that folding of the polymer chain into a compact 3D structure is involved in the formation of these nanoparticles, the process by which these intrinsically hydrophobic nanoscale particles circumvent aggregation in water is still not well understood. Zeta potential results show tha… Show more

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Cited by 77 publications
(105 citation statements)
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References 21 publications
(43 reference statements)
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“…However, a clear disturbance (peak broadening and a small decrease of absorption intensity) in the specific absorption bands within the transition from L to OL is visible and assigned to oxidized L incorporation. 25 Discrete central micro-regions from L to OL were investigated by FTIR micro-spectroscopy in which the gradient of composition along the longitudinal direction of the combinatorial deposition was evidenced. We present in Fig.…”
mentioning
confidence: 99%
“…However, a clear disturbance (peak broadening and a small decrease of absorption intensity) in the specific absorption bands within the transition from L to OL is visible and assigned to oxidized L incorporation. 25 Discrete central micro-regions from L to OL were investigated by FTIR micro-spectroscopy in which the gradient of composition along the longitudinal direction of the combinatorial deposition was evidenced. We present in Fig.…”
mentioning
confidence: 99%
“…These were created through the incorporation of photochromic spiropyran molecules into a PFBT polymer and were intended for use in bioimaging applications. In another example, a pH-sensing Pdot was created by functionalizing PPE Pdots with pH-sensitive fluorescein [145].…”
Section: Dendrimers and Polymer Macromoleculesmentioning
confidence: 99%
“…[40][41][42][43][44] Es gab beachtliche Bemühungen, vielseitige halbleitende Polymernanopartikel (eine kleine Untergruppe davon sind die P-Punkte) zu erzeugen, ihre Eigenschaften und Funktionen einzustellen und deren Leistung für biomedizinische Untersuchungen zu verbessern. Die Forschungsbemühungen umfassen die Nutzung neuer Herstellungsverfahren, [45,46,69,70,72] die Untersuchung von NanopartikelBildungsmechanismen, [120,121] Sondierung der Photophysik der Nanopartikel, [47,49,54,122,123] Charakterisierung der Fluoreszenzleistung, [48,51,56,58] Abstimmung der Emissionsfarbe, [47,49,71,89] das Manipulieren der Partikeloberflä-che, [56-58, 64-66, 98, 102] die Verkapselung von anorganischen Materialien, [96,97,99,104,105] Entwicklung von Nanopartikelsensoren, [52,59,60,62,74,77] die Bildung von zellulären Strukturen, [56,57,[63][64][65][66] sowie das In-vivo-"Targeting" bei kleinen Tieren. [58,…”
Section: Von Konjugierten Polyelektrolyt-biosensoren Zu Hydrophoben Punclassified
“…Kee und Mitarbeiter schlugen vor, dass die Oxidation der halbleitenden Polymere während der P-Punkt-Bildung zu teilweise ionisierten Defekten führt, die ihrerseits die Nanopartikelsuspension stabilisieren. [121] Zeta-Potential-Messungen zeigten, dass PPunkte im neutralem pH-Bereich eine negativ geladene Oberfläche mit einem Zeta-Potential von etwa À40 mV und einer Oberflächenladungsdichte von (1.39-1.70) 10 À2 C m…”
Section: Kolloidale Stabilität Und Chemische Stabilitätunclassified