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Malvern zetasizer error 3070
Malvern zetasizer error 3070













malvern zetasizer error 3070 malvern zetasizer error 3070

doi: 10.1071/EN09106īagalkot V, Zhang L, Levy-Nissenbaum E, Jon S, Kantoff PW, Langer R, Farokhzad OC (2007) Quantum dot–aptamer conjugates for synchronous cancer imaging, therapy, and sensing of drug delivery based on bi-fluorescence resonance energy transfer. Environmental Protection Agency, AthensĪruguete DM, Guest JS, Yu WW, Love NG, Hochella MF Jr (2010) Interaction of CdSe/CdS core-shell quantum dots and Pseudomonas aeruginosa. In Office of Research and Development U.S. Nat Biotechnol 22:47–52Īllison JD, Brown DS, Novo-Grada (1999) MINTEQA2/PRODEFA2, A geochemical assessment model for environmental systems, version 3.0. doi: 10.1021/ja047000+Īlivisatos P (2004) The use of nanocrystals in biological detection. J Am Chem Soc 123:8844–8850Īldana J, Lavelle N, Wang Y, Peng X (2005) Size-dependent dissociation pH of thiolate ligands from cadmium chalcogenide nanocrystals. Surprisingly, the presence of histidine, an amino acid with an imidazole functional group, leads to the formation of much strong Cd complexes over time, which may be non-labile, inducing variations in the local environment of the QD surface.Īldana J, Wang YA, Peng X (2001) Photochemical instability of CdSe nanocrystals coated by hydrophobic thiols. The citric acid presence resulted in greater QD dissolution, whereas glycine, an amino acid, acts against QD dissolution. At pH 8.5 the largest PAA ability to complex the dissolved Cd leads to a further QD solubility until the equilibrium is reached (24 % of dissolved Cd vs. The highest QD dissolution was obtained at the more acidic pH in absence of the ligands (52 %) a result of the CdS shell solubility. The effects of various concentrations of small organic ligands such as citric acid, glycine, and histidine and the roles of pH (4.5–8.5) and exposure time (0–48 h) were evaluated. The scanned stripping chronopotentiometry and absence of gradients and Nernstian equilibrium stripping techniques were used to determine the concentration of Cd dissolved from a polyacrylate-stabilized CdTe/CdS QD. The improvement of knowledge about the toxicity and even processability, and stability of quantum dots (QD) requires the understanding of the relationship between the QD binding head group, surface structure, and interligand interaction.















Malvern zetasizer error 3070