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Journal articles on the topic '3-Mercaptopropionic acid (MPA)'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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1

Fischer, Fabian. "3-Mercaptopropionic Acid (3-MPA)." Synlett, no. 8 (2002): 1368–69. http://dx.doi.org/10.1055/s-2002-32979.

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2

Forlano, Paula, José A. Olabe, Jorge F. Magallanes, and Miguel A. Blesa. "The mechanism of oxidation of 3-mercaptopropionic acid." Canadian Journal of Chemistry 75, no. 1 (1997): 9–13. http://dx.doi.org/10.1139/v97-002.

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The mechanism of the oxidation of 3-mercaptopropionic acid (3-MPA) by hydrogen peroxide was studied in the acidic pH range. The nucleophilic attack by sulphur on the peroxide bond controls the rate. Extrapolation of the pH dependency suggests that the rate of attack by the deprotonated dianion is highest. Traces of Fe(III), at levels below 10−7 mol dm−3, do not catalyze efficiently the process through one-electron mechanisms; at higher concentrations, or on the surface of iron(III) oxides, this type of catalysis becomes important. The electrochemical oxidation of 3-MPA was also studied, using
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3

Ali, Imran, Changsheng Peng, Tong Ye, and Iffat Naz. "Sorption of cationic malachite green dye on phytogenic magnetic nanoparticles functionalized by 3-marcaptopropanic acid." RSC Advances 8, no. 16 (2018): 8878–97. http://dx.doi.org/10.1039/c8ra00245b.

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Phytogenic magnetic nanoparticles (PMNPs) fabricated fromFraxinus chinensisRoxb. leaves extract were functionalized by 3-mercaptopropionic acid (3-MPA) for the removal of toxic dye malachite green (MG) from aqueous solutions.
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4

Zhang, Fan, Miaomiao Chen, Haiqing Zhang, et al. "Fluorescence suppression of MPA stabilized CdTe QDs for direct determination of propranolol." Analytical Methods 9, no. 6 (2017): 929–36. http://dx.doi.org/10.1039/c6ay02711c.

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A sensitive, convenient and rapid fluorescent sensor for effectively and directly detecting propranolol was proposed based on the fluorescence suppression of 3-mercaptopropionic acid stabilized CdTe quantum dots.
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Barbosa, João A. C., Vera L. R. G. Abreu, S. Sofia M. Rodrigues, Christian Frigerio, and João L. M. Santos. "A CdTe–MPA quantum dot fluorescence enhancement flow method for chlorhexidine determination." Anal. Methods 6, no. 12 (2014): 4240–46. http://dx.doi.org/10.1039/c4ay00540f.

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In this work the fluorescence enhancement that water-soluble CdTe quantum dots (QDs) capped with 3-mercaptopropionic acid (MPA) exhibit in the presence of a biguanide compound, chlorhexidine, was investigated.
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6

JIAN, W., S. LIU, J. LI, and W. YANG. "Decomposition Reaction of Zn-MPA(3-Mercaptopropionic Acid) Complex Under Microwave Irradiation." Chemical Research in Chinese Universities 24, no. 3 (2008): 353–56. http://dx.doi.org/10.1016/s1005-9040(08)60074-4.

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7

Lai, Lai-Hung, Widianta Gomulya, Loredana Protesescu, Maksym V. Kovalenko, and Maria A. Loi. "High performance photoelectrochemical hydrogen generation and solar cells with a double type II heterojunction." Phys. Chem. Chem. Phys. 16, no. 16 (2014): 7531–37. http://dx.doi.org/10.1039/c4cp00632a.

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We report on the fabrication of CdSe quantum dot (QD) sensitized electrodes by direct adsorption of colloidal QDs on mesoporous TiO<sub>2</sub>followed by 3-mercaptopropionic acid (MPA) ligand exchange.
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Qin, Jin, Dongxia Li, Yanming Miao, and Guiqin Yan. "Detection of phosphate based on phosphorescence of Mn doped ZnS quantum dots combined with cerium(iii)." RSC Adv. 7, no. 74 (2017): 46657–64. http://dx.doi.org/10.1039/c7ra07991e.

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A simple and rapid room-temperature phosphorescence (RTP) sensor for phosphate detection was developed on the basis of Ce<sup>3+</sup> modulated mercaptopropionic acid (MPA)-capped Mn-doped ZnS quantum dots (QDs).
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9

Zhao, Xiaojuan, Fengxia Li, Qingyan Zhang, et al. "Mn-doped ZnS quantum dots with a 3-mercaptopropionic acid assembly as a ratiometric fluorescence probe for the determination of curcumin." RSC Advances 5, no. 28 (2015): 21504–10. http://dx.doi.org/10.1039/c5ra01412c.

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Mn-doped ZnS quantum dots capped with 3-mercaptopropionic acid (MPA) were synthesized by a facile method in aqueous solution as a ratiometric fluorescent (I<sub>590 nm</sub>/I<sub>458 nm</sub>) probe for curcumin.
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10

dos Santos, José Augusto Lucena, Fabio Baum, Emerson Cristofer Kohlrausch, et al. "3-Mercaptopropionic, 4-Mercaptobenzoic, and Oleic Acid-Capped CdSe Quantum Dots: Interparticle Distance, Anchoring Groups, and Surface Passivation." Journal of Nanomaterials 2019 (February 18, 2019): 1–9. http://dx.doi.org/10.1155/2019/2796746.

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The optoelectronic properties of quantum dots are strongly controlled by the chemical nature of their surface-passivating ligands. In this work, we present the synthesis, characterization, and surface modification of CdSe quantum dots (QDs) and their application in solar cells. CdSe QDs were capped in oleic acid (OA), 3-mercaptopropionic acid (MPA), and 4-mercaptobenzoic acid (MBA). The QDs were characterized by transmission electron microscopy (TEM), UV-Vis absorption and emission spectrophotometry, thermogravimetric analyses, and 1H and 13C NMR. From TEM analysis, it has been observed that i
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Ovchinnikov, Oleg V., Sergey V. Aslanov, Mikhail S. Smirnov, Irina G. Grevtseva, and Aleksey S. Perepelitsa. "Photostimulated control of luminescence quantum yield for colloidal Ag2S/2-MPA quantum dots." RSC Advances 9, no. 64 (2019): 37312–20. http://dx.doi.org/10.1039/c9ra07047h.

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In this paper, we present the results on photoinduced formation of colloidal Ag<sub>2</sub>S quantum dots with sizes of 1.5–3 nm passivated by 2-mercaptopropionic acid (Ag<sub>2</sub>S/2-MPA) in the presence of ethylene glycol.
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12

Sunarya, Yayan. "3-Mercaptopropionic Acid as Corrosion Inhibitor for Carbon Steel in CO2 Aerated 1% NaCl Solution with Buffer Control-pH." Molekul 13, no. 2 (2018): 98. http://dx.doi.org/10.20884/1.jm.2018.13.2.340.

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In this research, 3-Mercaptopropionic acid (MPA) as corrosion inhibitor of carbon steel in CO2 aerated 1% NaCl solution with buffer pH adjustment has been studied by means of electrochemical impedance (EIS) and polarization (Tafel plot). MPA was found to be an effective carbon steel inhibitor. Percentage inhibition efficiency (IE %) calculated by both Tafel plot and EIS, ranged from 85% to 90%. MPA was found to affect the cathodic processes and act as cathodic-type inhibitors. Mechanism of inhibit corrosion by adsorption mechanism leads to the formation of a protective chemisorbed film on the
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13

Suthisa, Leasen, Jose Hector Hodak, Jiraporn Srisala, et al. "Detecting DNA-DNA Hybridization at 3-Mercaptopropionic Acid Self-Assembled on Tin-Doped Indium Oxide Film with Electrochemical Measurement." Advanced Materials Research 770 (September 2013): 402–8. http://dx.doi.org/10.4028/www.scientific.net/amr.770.402.

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Self-assembled monolayers (SAM) of 3-mercaptopropionic acid (MPA) were applied on tin-doped indium oxide (ITO) surfaces and used as a working electrode for sensing DNA hybridization. The concentration of probe single stranded DNA (ssDNA), complemented with target DNA, was optimized for the highest yield immobilization on MPA/ITO platform. The ssDNA/MPA/ITO was allowed to hybridize to target DNA prepared from PCR amplification that first tested by the synthesized complementary sequences. Both cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were employed for investigating probe
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14

Yang, Wei Yong, Kui Ying Li, Sai Ling Wei, Guang Jing Song, and Jan Zhang. "Relationship between Microstructure and Photoelectron Behaviors of CdTe/Ligand Self-Assembly Quantum Dots." Materials Science Forum 685 (June 2011): 114–18. http://dx.doi.org/10.4028/www.scientific.net/msf.685.114.

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A water-soluble CdTe QDs capped by 3-Mercaptopropionic acid (MPA) were synthesized. The results confirmed that the grain size of the QDs was controlled by changing the reflux time of precursor solution and that the QDs possessed obviously quantum size effect. The results showed that a depletion layer CdTe1-xSx(0£x≤1) formed in between CdTe nanoparticle and ligand MPA. It is believed that two heterojunction-like structures possess quite distinct surface photovoltaic characteristic excited between the core-CdTe and the shell-CdS, and between CdTe/CdS and the ligand MPA, respectively, according t
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15

Vijaya Bharathi, M., Santanu Maiti, Bidisha Sarkar, Kaustab Ghosh, and Priyankar Paira. "Water-mediated green synthesis of PbS quantum dot and its glutathione and biotin conjugates for non-invasive live cell imaging." Royal Society Open Science 5, no. 3 (2018): 171614. http://dx.doi.org/10.1098/rsos.171614.

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This study addresses the cellular uptake of nanomaterials in the field of bio-applications. In the present study, we have synthesized water-soluble lead sulfide quantum dot (PbS QD) with glutathione and 3-MPA (mercaptopropionic acid) as the stabilizing ligand using a green approach. 3-MPA-capped QDs were further modified with streptavidin and then bound to biotin because of its high conjugation efficiency. Labelling and bio-imaging of cells with these bio-conjugated QDs were evaluated. The bright red fluorescence from these types of QDs in HeLa cells makes these materials suitable for deep tis
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Feleni, Usisipho, Rachel Fanelwa Ajayi, Abongile Jijana, et al. "Tin Selenide Quantum Dots Electrochemical Biotransducer for the Determination of Indinavir - A Protease Inhibitor Anti-Retroviral Drug." Journal of Nano Research 44 (November 2016): 196–207. http://dx.doi.org/10.4028/www.scientific.net/jnanor.44.196.

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Biocompatibility of tin selenide quantum dots was achieved by the incorporation of 3-mercaptopropionic acid (3-MPA) as a capping agent, which also improved the stability and the solubility of the material. The UV-Vis spectrophotometric analysis of the quantum dots revealed a broad absorption band at ~ 330 nm (with a corresponding band gap, Eg, value of 3.75 eV), which is within the range of values expected for quantum dots materials. The 3-mercaptopropionic acid-capped tin selenide (3-MPA-SnSe) quantum dots were used to develop an electrochemical biosensor for indinavir, which is a protease in
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Feleni, Usisipho, Rachel Fanelwa Ajayi, Abongile Jijana, et al. "Tin Selenide Quantum Dots Electrochemical Biotransducer for the Determination of Indinavir - A Protease Inhibitor Anti-Retroviral Drug." Journal of Nano Research 45 (January 2017): 12–24. http://dx.doi.org/10.4028/www.scientific.net/jnanor.45.12.

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Biocompatibility of tin selenide quantum dots was achieved by the incorporation of 3-mercaptopropionic acid (3-MPA) as a capping agent, which also improved the stability and the solubility of the material. The UV-Vis spectrophotometric analysis of the quantum dots revealed a broad absorption band at ~ 330 nm (with a corresponding band gap, Eg, value of 3.75 eV), which is within the range of values expected for quantum dots materials. The 3-mercaptopropionic acid-capped tin selenide (3-MPA-SnSe) quantum dots were used to develop an electrochemical biosensor for indinavir, which is a protease in
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18

Vo, Ngoc Thuy, Hai Dang Ngo, Ngoc Phuong Do Thi, Kim Phung Nguyen Thi, Ai Phuong Duong, and Vinh Lam. "Stability Investigation of Ligand-Exchanged CdSe/ZnS-Y (Y = 3-Mercaptopropionic Acid or Mercaptosuccinic Acid) through Zeta Potential Measurements." Journal of Nanomaterials 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/8564648.

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Quantum dots have been considered to be promising candidates for bioapplications because of their high sensitivity, rapid response, and reliability. The synthesis of high-quality quantum dots that can be dissolved in water and other biological media is a crucial step toward their further application in biology. Starting with a one-pot reaction and the successive ionic layer adsorption and reaction (SILAR) method, we produced the CdSe/ZnS core/shell structure. Through a ligand-exchange mechanism, we coated the as-made CdSe/ZnS structure with 3-mercaptopropionic acid (MPA) or mercaptosuccinic ac
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19

Rosli, Siti Azlina, Z. A. Zubir, and N. M. A. Aziz. "Characterization of ZnS Nanoparticles Using MPA as Capping Agents." Advanced Materials Research 364 (October 2011): 434–38. http://dx.doi.org/10.4028/www.scientific.net/amr.364.434.

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In this study, the synthesis and characterization of ZnS nanoparticles in aqueous solution precipitation using MPA as capping agents were reported. The 3-mercaptopropionic acid (MPA) was used as the capping agent to control the size of the ZnS nanoparticles. We found that the particles size of ZnS using MPA as capping agent was less than 10nm; ranging from 6-8 nm in size and sphere in shape using TEM measurements. Meanwhile, the photoluminescence and optical absorption were collected using Spectrofluorometer. As the results, the emission band for photoluminescence spectra was blue (~ 425 nm) a
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20

Wang, Chao, Qiang Ma, and Xingguang Su. "Synthesis of CdTe Nanocrystals with Mercaptosuccinic Acid as Stabilizer." Journal of Nanoscience and Nanotechnology 8, no. 9 (2008): 4408–14. http://dx.doi.org/10.1166/jnn.2008.269.

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Water soluble high quality CdTe nanocrystals (NCs) with mercaptosuccinic acid (MSA) as stabilizer are prepared by refluxing and hydrothermal synthesis in this paper. The MSA stabilizer which comprises both thioglycolic acid (TGA)-like and 3-mercaptopropionic acid (MPA)-like moieties can accelerate the whole growth process of CdTe NCs comparing with TGA-like or MPA-like stabilizer. It takes only 5 min and 2 hours to obtain green emitting (luminescence maximum at 526 nm) and red emitting (luminescence maximum at ∼650 nm) from CdTe NCs, respectively. In this study, the influences of the ratios of
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21

Khan, Aslam. "CdS Nanoparticles with a Thermoresponsive Polymer: Synthesis and Properties." Journal of Nanomaterials 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/451506.

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This paper describes the synthesis of thermoresponsive colloidal nanocomposites based on CdS and poly(N-isopropylacrylamide). The CdS nanoparticles were prepared at room temperature from cadmium chloride and sodium sulfide salts in the presence of an organic ligand, 3-mercaptopropionic acid (MPA). The as-prepared MPA-bound CdS nanoparticles were stable for more than 30 days and exhibited good optical properties. The effect of various ratios of MPA/Cd2+and H2O/DMF (dimethylformamide) on the particle size of the CdS nanoparticles was investigated using UV-vis absorption measurements. Transmissio
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Wang, Qing, Guang Xue Chen, Jing Lei Tai, Qi Feng Chen, and Ming Hui He. "UV Curable Thiol-Ene Adhesive for Flexible Packaging Based on CO." Applied Mechanics and Materials 644-650 (September 2014): 5308–11. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.5308.

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An important thiol ester photosensitive monomer COMP (CO-based mercaptopropionate) was prepared via melt polycondensation method using castor oil (CO) and 3-Mercaptopropionic acid (3-MPA). Structure of the thiol-compounds was characterized by FT-IR, 1H-NMR. When the thiol compound was used as photosensitive monomer and polyurethane-acrylate prepolymer was used as main material in UV curable adhesive. The UV curable adhesive showed good curing behaviors and thermal stability with curing time 100s, T-peel strength 3.8N/25mm and shrinkage rate 8%; so the UV curable adhesive could meet the require
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Wang, Ren Bao, Ling Liu, Lei Wan, and Jin Zhang Xu. "Application of Nano-SiO2 on Photoanode of Quantum Dots Sensitized Solar Cells." Advanced Materials Research 850-851 (December 2013): 169–72. http://dx.doi.org/10.4028/www.scientific.net/amr.850-851.169.

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A new TiO2-nanoSiO2 hybrid film is prepared through adding the nanosized SiO2 into the TiO2. A more environmental and simpler method is found to prepare CdSe quantum dots (QDs) sensitized TiO2nanoSiO2 hybrid films for the quantum dots-sensitized solar cells (QDSSCs) application. The prepared colloidal CdSe QDs (~2.6nm) was linked to the TiO2-nanoSiO2 hybrid film using 3-mercaptopropionic acid (3-MPA) as a linker molecule slowly with drop and drop. The power conversion efficiency of 1.33% was achieved using the sensitization photo-electrode prepared by using TiO2nanoSiO2 hybrid film modified wi
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Sakellari, Georgia I., Nicole Hondow, and Philip H. E. Gardiner. "Factors Influencing the Surface Functionalization of Citrate Stabilized Gold Nanoparticles with Cysteamine, 3-Mercaptopropionic Acid or l-Selenocystine for Sensor Applications." Chemosensors 8, no. 3 (2020): 80. http://dx.doi.org/10.3390/chemosensors8030080.

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Thiols and selenides bind to the surface of gold nanoparticles (AuNPs) and thus provide suitable platforms for the fabrication of sensors. However, the co-existence of adsorbed citrate on the surface of the nanoparticles can influence their functionalization behavior and potentially their sensing performance measured by the extent of particle aggregation. In this study, the functionalization of purchased (7.3 ± 1.2 nm) and in-house prepared AuNPs (13.8 ± 1.2 nm), under the same experimental conditions with either cysteamine (Cys), 3-mercaptopropionic acid (3-MPA), or l-selenocystine (SeCyst) w
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Masikini, Milua, Peter M. Ndangili, Chinwe O. Ikpo, et al. "Optoelectronics of Stochiometrically Controlled Palladium Telluride Quantum Dots." Journal of Nano Research 40 (March 2016): 29–45. http://dx.doi.org/10.4028/www.scientific.net/jnanor.40.29.

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Water dispersed PdTe semiconducting nanocrystals were synthesized and stabilised with 3-mercaptopropionic acid (3-MPA). HRTEM studies revealed the formation of spherical nanoparticles of average size ~4 nm with good crystallinity. UV-visible spectral analysis and band gap measurements confirmed that the nanocrystals are indeed semiconductors. This semiconducting characteristic was supported by electrochemical impedance spectroscopy (EIS) data which gave Bode plots with absolute frequency and a maximum frequency phase angle values of 38.3° and 75°, respectively. Electroanalysis of the film on g
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Pavanelli, André L. S., Leandro N. C. Máximo, Roberto S. da Silva, and Iouri E. Borissevitch. "Effect of Serum Albumin on Porphyrin-Quantum Dot Complex Formation, Characteristics and Spectroscopic Analysis." Nanomaterials 11, no. 7 (2021): 1674. http://dx.doi.org/10.3390/nano11071674.

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The effect of bovine serum albumin (BSA) upon interaction between CdTe QD functionalized by 3-Mercaptopropionic Acid (CdTe-3-MPA QD) and two water soluble porphyrins: positively charged meso-tetra methyl pyridyl porphyrin (TMPyP) and negatively charged meso-tetrakis(p-sulfonato-phenyl) porphyrin (TPPS4), was studied in function of pH using the steady-state and time resolved optical absorption and fluorescence spectroscopies. It was shown that, depending on the charge state of the components, interaction with albumin could either prevent the formation of the QD…PPh complex, form a mixed QD…PPh…
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Ayele, Delele Worku, Wein-Nien Su, and Bing-Joe Hwang. "A Low-Cost Polytetrafluoroethylene-Framed TiO2Electrode Decorated with Oleic Acid-Capped CdSe Quantum Dots for Solar Cell." Journal of Energy 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/394512.

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Colloidal CdSe QDs have been assembled, as quantum dot-sensitized solar cells (QDSSCs), on a novel architecture comprising a polytetrafluoroethylene- (PTFE-) framed TiO2electrode for the first time. CdSe QDs are anchored on the surface of the film using a linker molecule (3-mercaptopropionic acid, MPA). The resulting photoelectrode comprises a TiO2compact layer and a PTFE-framed structural layer with average respective thicknesses of 2 μm for the compact layer and either 23 μm or 28 μm for the PTFE-framed structural layer. UV-vis absorption spectra show that more CdSe quantum dots are anchored
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Jiang, Lu, Su, et al. "High Sensitivity Detection of Copper Ions in Oysters Based on the Fluorescence Property of Cadmium Selenide Quantum Dots." Chemosensors 7, no. 4 (2019): 47. http://dx.doi.org/10.3390/chemosensors7040047.

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Cadmium selenide (CdSe) quantum dots (QDs) were synthesized by water phase synthesis method using 3-mercaptopropionic acid (3-MPA) as a stabilizer, and they were applied to the detection of copper ions (Cu2+). The results showed that CdSe QDs have excellent selectivity and sensitivity toward Cu2+. The fluorescence intensity of CdSe QDs decreased with the increase of Cu2+ concentration. The linear range was from 30 nM to 3 μM, and the detection limit was 30 nM. Furthermore, CdSe QDs were used for detecting the concentration of Cu2+ in oysters. The content of Cu2+ was 40.91 mg/kg, which was clos
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Fan, Qirui, Abhilasha Dehankar, Thomas K. Porter, and Jessica O. Winter. "Effect of Micelle Encapsulation on Toxicity of CdSe/ZnS and Mn-Doped ZnSe Quantum Dots." Coatings 11, no. 8 (2021): 895. http://dx.doi.org/10.3390/coatings11080895.

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The optical properties of quantum dots (QD) make them excellent candidates for bioimaging, biosensing, and therapeutic applications. However, conventional QDs are comprised of heavy metals (e.g., cadmium) that pose toxicity challenges in biological systems. Synthesising QDs without heavy metals or introducing thick surface coatings, e.g., by encapsulation in micelles, can reduce toxicity. Here, we examined the toxicity of micelle encapsulated tetrapod-shaped Mn-doped ZnSe QDs, comparing them to 3-mercaptopropionic acid (MPA)-capped Mn-doped ZnSe QDs prepared by ligand exchange and commercial C
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Han, Zhizhong, Qinghua Weng, Chaofan Lin, Jinquan Yi, and Jie Kang. "Development of CdSe–ZnO Flower-Rod Core-Shell Structure Based Photoelectrochemical Biosensor for Detection of Norovirous RNA." Sensors 18, no. 9 (2018): 2980. http://dx.doi.org/10.3390/s18092980.

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In this work, the CdSe–ZnO flower-rod core-shell structure (CSZFRs) was prepared by ion-exchange method. The surface of CSZFRs was modified by 3-mercaptopropionic acid (MPA), and then the DNA probe was immobilized on the surface via chemical bond between -NH2 of DNA probe and -COOH of MPA. Finally, the target norovirous (NV) RNA was combined with the probe according to the principle of complementary base pairing, resulting in a decrease of the photocurrent. The results show that the absorbance spectrum of visible light is enhanced for CSZFRs compared with pure ZnO. Under visible light irradiat
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Navarro Arenas, Juan, Ananthakumar Soosaimanickam, Hamid Pashaei Adl, et al. "Ligand-Length Modification in CsPbBr3 Perovskite Nanocrystals and Bilayers with PbS Quantum Dots for Improved Photodetection Performance." Nanomaterials 10, no. 7 (2020): 1297. http://dx.doi.org/10.3390/nano10071297.

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Nanocrystals surface chemistry engineering offers a direct approach to tune charge carrier dynamics in nanocrystals-based photodetectors. For this purpose, we have investigated the effects of altering the surface chemistry of thin films of CsPbBr3 perovskite nanocrystals produced by the doctor blading technique, via solid state ligand-exchange using 3-mercaptopropionic acid (MPA). The electrical and electro-optical properties of photovoltaic and photoconductor devices were improved after the MPA ligand exchange, mainly because of a mobility increase up to 5 × 10−3 cm 2 / Vs . The same technolo
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Maulu, Alberto, Juan Navarro-Arenas, Pedro Rodríguez-Cantó, et al. "Charge Transport in Trap-Sensitized Infrared PbS Quantum-Dot-Based Photoconductors: Pros and Cons." Nanomaterials 8, no. 9 (2018): 677. http://dx.doi.org/10.3390/nano8090677.

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Control of quantum-dot (QD) surface chemistry offers a direct approach for the tuning of charge-carrier dynamics in photoconductors based on strongly coupled QD solids. We investigate the effects of altering the surface chemistry of PbS QDs in such QD solids via ligand exchange using 3-mercaptopropionic acid (MPA) and tetrabutylammonium iodide (TBAI). The roll-to-roll compatible doctor-blade technique was used for the fabrication of the QD solid films as the photoactive component in photoconductors and field-effect phototransistors. The ligand exchange of the QD solid film with MPA yields supe
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Pambudi, Muhammad Tegar, Suhandoko Dwi Isro, and Priastuti Wulandari. "Localized Surface Plasmon Resonance Effect of Gold Nanoparticles Using 3-Mercaptopropionic Acid as Capping Material for Sensing Probe." Key Engineering Materials 891 (July 6, 2021): 43–48. http://dx.doi.org/10.4028/www.scientific.net/kem.891.43.

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Gold nanoparticles (AuNP) has been used in a wide range of applications especially in medicine and optoelectronic applications due to its localized surface plasmon resonance (LSPR) effect. LSPR observation of AuNP solution shows that the plasmonic peak in the absorbance spectra lies in the range of visible light around 520 nm with deep red-wine color. The optical characteristic is controlled by the size and shape of the nanoparticles including its surface functionalization. Our research is focused on the adsorption study of 3-mercaptopropionate (3-MP) on AuNP (AuMP) surface synthesized by liga
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Zhang, Yuwei, Ping Song, Tiankai Chen, et al. "Unique size-dependent nanocatalysis revealed at the single atomically precise gold cluster level." Proceedings of the National Academy of Sciences 115, no. 42 (2018): 10588–93. http://dx.doi.org/10.1073/pnas.1805711115.

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Atomically precise metal clusters have attracted increasing interest owing to their unique size-dependent properties; however, little has been known about the effect of size on the catalytic properties of metal clusters at the single-cluster level. Here, by real-time monitoring with single-molecule fluorescence microscopy the size-dependent catalytic process of individual Au clusters at single-turnover resolution, we study the size-dependent catalytic behaviors of gold (Au) clusters at the single-cluster level, and then observe the strong size effect on the catalytic properties of individual A
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Dai, Zhao, Ping Li, Ji Mei Zhang, et al. "Poly(4-vinylpyridine) Coated CdTe Core/Shell Quantum Dots." Advanced Materials Research 60-61 (January 2009): 114–18. http://dx.doi.org/10.4028/www.scientific.net/amr.60-61.114.

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A kind of novel quantum dots (QDs) with poly(4-vinylpyridine) (PVPy) as shell and CdTe QDs as core was presented in this work. This core/shell ODs can conjugate DNA easily because the surface pyridyl exist on QDs, and which has potential application in DNA biosensors field. CdTe QDs were prepared in aqueous solution with 3-mercaptopropionic acid (MPA) as stabilizer. It was found that the fluorescent intensity of QDs was depended the reflux time. Following the increase of reflux time, the fluorescent intensity of QDs reached the maximum at 10 h with about 10 nm in diameters. And the fluorescent
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36

Mat Zaid, Mohd Hazani, Che Engku Noramalina Che-Engku-Chik, Nor Azah Yusof, et al. "DNA Electrochemical Biosensor Based on Iron Oxide/Nanocellulose Crystalline Composite Modified Screen-Printed Carbon Electrode for Detection of Mycobacterium tuberculosis." Molecules 25, no. 15 (2020): 3373. http://dx.doi.org/10.3390/molecules25153373.

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Death from tuberculosis has resulted in an increased need for early detection to prevent a tuberculosis (TB) epidemic, especially in closed and crowded populations. Herein, a sensitive electrochemical DNA biosensor based on functionalized iron oxide with mercaptopropionic acid (MPA-Fe3O4) nanoparticle and nanocellulose crystalline functionalized cetyl trimethyl ammonium bromide (NCC/CTAB) has been fabricated for the detection of Mycobacterium tuberculosis (MTB). In this study, a simple drop cast method was applied to deposit solution of MPA-Fe3O4/NCC/CTAB onto the surface of the screen-printed
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37

Tran, Hong Diep Thi, Cao Tri Nguyen, Khanh Thien Le, Ngoc Thuy Thi Vo, and Hieu Van Tran. "Application of quantum dots as fluorescent maker in cell labeling." Science and Technology Development Journal - Natural Sciences 2, no. 6 (2019): 57–65. http://dx.doi.org/10.32508/stdjns.v2i6.844.

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Quantum dots (QDs) have the potential to be used as a marker in research and supporting for medical treatment because of their unique optical and electronic properties such as size-tuneable light emission, narrow emission, high photostability, etc. With the goal of applying for biomarkers, QDs are often attached with antibodies. In order to simplify the binding process, we experimented to attach adaptor protein, namely protein A/G to CdSe/ZnS QDs covered by 3-mercaptopropionic acid (MPA). 80.7 % and 51.2 % of protein A/G at the concentration of 60 μg/mL and 20 μg/mL, respectively, conjugated w
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38

Labiadh, Houcine, Tahar Ben Chaabane, Romain Sibille, Lavinia Balan, and Raphaël Schneider. "A facile method for the preparation of bifunctional Mn:ZnS/ZnS/Fe3O4 magnetic and fluorescent nanocrystals." Beilstein Journal of Nanotechnology 6 (August 17, 2015): 1743–51. http://dx.doi.org/10.3762/bjnano.6.178.

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Bifunctional magnetic and fluorescent core/shell/shell Mn:ZnS/ZnS/Fe3O4 nanocrystals were synthesized in a basic aqueous solution using 3-mercaptopropionic acid (MPA) as a capping ligand. The structural and optical properties of the heterostructures were characterized by X-ray diffraction (XRD), dynamic light scattering (DLS), transmission electron microscopy (TEM), UV–vis spectroscopy and photoluminescence (PL) spectroscopy. The PL spectra of Mn:ZnS/ZnS/Fe3O4 quantum dots (QDs) showed marked visible emission around 584 nm related to the 4T1 → 6A1 Mn2+ transition. The PL quantum yield (QY) and
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39

Kashyout, A. B., Hesham M. A. Soliman, Marwa Fathy, E. A. Gomaa, and Ali A. Zidan. "CdSe Quantum Dots for Solar Cell Devices." International Journal of Photoenergy 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/952610.

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CdSe quantum dots have been prepared with different sizes and exploited as inorganic dye to sensitize a wide bandgap TiO2thin films for QDs solar cells. The synthesis is based on the pyrolysis of organometallic reagents by injection into a hot coordinating solvent. This provides temporally discrete nucleation and permits controlled growth of macroscopic quantities of nanocrystallites. XRD, HRTEM, UV-visible, and PL were used to characterize the synthesized quantum dots. The results showed CdSe quantum dots with sizes ranging from 3 nm to 6 nm which enabled the control of the optical properties
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40

Edwina, Uzunuigbe O., Ayabei Kiplagat, Nicole R. S. Sibuyi, Mervin Meyer, Abidemi Paul Kappo, and Martin O. Onani. "Synthesis and cytotoxic evaluation of gum arabic surface modified cadmium telluride quantum dots." Materials Express 10, no. 5 (2020): 611–19. http://dx.doi.org/10.1166/mex.2020.1675.

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Water-soluble cadmium telluride (CdTe) quantum dots (QDs) were capped with gum Arabic (GA) is a non-toxic, water-soluble glycoprotein polymer commonly used in the food and pharmaceutical industries. The GA was used to stabilise cadmium telluride quantum dots (GA-QDs) and provides functional groups for other molecules such as nucleic acids, peptides and antibodies to be attached to the QDs for biological and biomedical appli- cations. In this study, the GA was used to cap and stabilise QDs using two different methods. These QDs were characterised using Ultraviolet-visible (UV-vis) and Photolumi
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Kulawik-Pióro, Agnieszka, Anna K. Drabczyk, Joanna Kruk, Magdalena Wróblewska, Katarzyna Winnicka, and Justyna Tchórzewska. "Thiolated Silicone Oils as New Components of Protective Creams in the Prevention of Skin Diseases." Materials 14, no. 16 (2021): 4723. http://dx.doi.org/10.3390/ma14164723.

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This work investigates the possibility of using thiolated silicone oils as new components in protective creams and their impact on the efficacy of these products. Thiolated silicone oils were synthesized by amide bond formation between primary amino groups of poly17dimethylsiloxane-co-(3-aminopropyl)-methylsiloxane] and carboxylic groups of thiol ligand (3-mercaptopropionic acid) with carbodiimide as a coupling agent. To evaluate and compare the properties of these kinds of thiomers, three different emulsion o/w types were obtained. Emulsion E1 contained methyl silicone oil, E2 poly[dimethylsi
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Saeed, Shomaila, Azhar Iqbal, and Azhar Iqbal. "Photoinduced charge carrier dynamics in a ZnSe quantum dot-attached CdTe system." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, no. 2235 (2020): 20190616. http://dx.doi.org/10.1098/rspa.2019.0616.

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A new nanohybrid material is prepared by attaching CdTe nanoneedles (NNs) to surface-modified ZnSe quantum dots (QDs). The NNs and QDs are prepared by a colloidal synthesis method in an aqueous alkaline medium. The surface modification and the attachment of nanostructures are achieved by a bifunctional ligand 3-mercaptopropionic acid (3-MPA). The band gap of the ZnSe QDs is varied by controlling the size of the QDs in order to get the maximum overlap between the absorption band of the CdTe NNs and the emission band of the ZnSe QDs, which is a prerequisite for effective charge/energy transfer.
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Kalangi, Suresh K., Nitin K. Swarnakar, R. Sathyavathi, D. Narayana Rao, Sanyog Jain, and Pallu Reddanna. "Synthesis, Characterization, and Biodistribution of Quantum Dot-Celecoxib Conjugate in Mouse Paw Edema Model." Oxidative Medicine and Cellular Longevity 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/3090517.

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Increased risk of cardiovascular side effects has been reported with many of the drugs in the market, including nonsteroidal anti-inflammatory drugs (NSAIDs). Hence, it is critical to thoroughly evaluate the biodistribution and pharmacokinetic properties of the drugs. Presently nanotechnology in combination with noninvasive imaging techniques such as magnetic resonance imaging (MRI), computed axial tomography (CAT), and positron emission tomography (PET) provides a better estimate of the spatio-temporal distribution of therapeutic molecules. Optical imaging using quantum dot- (QD-) tagged biol
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44

Heyne, Benjamin, Kristin Arlt, André Geßner, et al. "Mixed Mercaptocarboxylic Acid Shells Provide Stable Dispersions of InPZnS/ZnSe/ZnS Multishell Quantum Dots in Aqueous Media." Nanomaterials 10, no. 9 (2020): 1858. http://dx.doi.org/10.3390/nano10091858.

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Highly luminescent indium phosphide zinc sulfide (InPZnS) quantum dots (QDs), with zinc selenide/zinc sulfide (ZnSe/ZnS) shells, were synthesized. The QDs were modified via a post-synthetic ligand exchange reaction with 3-mercaptopropionic acid (MPA) and 11-mercaptoundecanoic acid (MUA) in different MPA:MUA ratios, making this study the first investigation into the effects of mixed ligand shells on InPZnS QDs. Moreover, this article also describes an optimized method for the correlation of the QD size vs. optical absorption of the QDs. Upon ligand exchange, the QDs can be dispersed in water. L
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Xu, Jianguo, Xinxin Wang, Chao Yan, and Wei Chen. "A Polyamidoamine Dendrimer-Based Electrochemical Immunosensor for Label-Free Determination of Epithelial Cell Adhesion Molecule- Expressing Cancer Cells." Sensors 19, no. 8 (2019): 1879. http://dx.doi.org/10.3390/s19081879.

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A new electrochemical immunosensor for cancer cell detection based on a specific interaction between the metastasis-related antigen of epithelial cell adhesion molecule (EpCAM) on the cell membrane and its monoclonal antibody (Anti-EpCAM) immobilized on a gold electrode has been developed. The amino-terminated polyamidoamine dendrimer (G6 PAMAM) was first covalently attached to the 3-mercaptopropionic acid (MPA)-functionalized gold electrode to obtain a thin film, and then completely carboxylated by succinic anhydride (SA). Next, the Anti-EpCAM was covalently bound with the G6 PAMAM to obtain
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46

Haiyun, Wu, Tadayoshi Muramatsu, Mutsuko Hirai, Kyoko Hibi, Huifeng Ren, and Hideaki Endo. "DEVELOPMENT OF LABEL-FREE BIOSENSOR FOR DETECTING STEROID HORMONE CONCENTRATION IN FISH." KnE Life Sciences 2, no. 1 (2015): 212. http://dx.doi.org/10.18502/kls.v1i0.106.

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A novel label-free immunosensor for detecting steroid hormone was developed. The principle of the sensor system is based on differences in the electrochemical activity induced by an immunoreaction that depends on the levels of steroid hormone in the sample. A gold electrode functionalized with 3-mercaptopropionic acid (MPA) self- assembled monolayer was used to fabricate electrochemical immunosensor. In addition, single-wall carbon nanotube (SWCNT) was selected to expandthe dynamic range of the sensor. The sensor was immersed into a sample solution and measurements were determined by cyclic vo
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Mokwebo, Kefilwe, Oluwatobi Oluwafemi, and Omotayo Arotiba. "An Electrochemical Cholesterol Biosensor Based on A CdTe/CdSe/ZnSe Quantum Dots—Poly (Propylene Imine) Dendrimer Nanocomposite Immobilisation Layer." Sensors 18, no. 10 (2018): 3368. http://dx.doi.org/10.3390/s18103368.

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We report the preparation of poly (propylene imine) dendrimer (PPI) and CdTe/CdSe/ZnSe quantum dots (QDs) as a suitable platform for the development of an enzyme-based electrochemical cholesterol biosensor with enhanced analytical performance. The mercaptopropionic acid (MPA)-capped CdTe/CdSe/ZnSe QDs was synthesized in an aqueous phase and characterized using photoluminescence (PL) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, transmission electron microscopy (TEM), X-ray power diffraction (XRD), energy dispersive X-ray (EDX) spectroscopy. The absorption and emission maxima of the
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48

Chiu, Hock Ing, Asila Dinie Ayub, Siti Nur Aishah Mat Yusuf, Noorfatimah Yahaya, Erazuliana Abd Kadir, and Vuanghao Lim. "Docetaxel-Loaded Disulfide Cross-Linked Nanoparticles Derived from Thiolated Sodium Alginate for Colon Cancer Drug Delivery." Pharmaceutics 12, no. 1 (2020): 38. http://dx.doi.org/10.3390/pharmaceutics12010038.

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In this study, fluorescein-labelled wheat germ agglutinin (fWGA)-conjugated disulfide cross-linked sodium alginate nanoparticles were developed to specifically target docetaxel (DTX) to colon cancer cells. Different amounts of 3-mercaptopropionic acid (MPA) were covalently attached to sodium alginate to form thiolated sodium alginate (MPA1–5). These polymers were then self-assembled and air-oxidised to form disulfide cross-linked nanoparticles (MP1–5) under sonication. DTX was successfully loaded into the resulting MP1–5 to form DTX-loaded nanoparticles (DMP1–5). DMP2 had the highest loading e
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49

Xu, Shi Chao, Cui Cui Yao, Ji Mei Zhang, et al. "Synthesis and Characterization of the Core-Shell CdTe/ZnS Quantum Dots." Advanced Materials Research 60-61 (January 2009): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.60-61.165.

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Core-shell quantum dots are colloidal particles consisting of a semiconductor core and a shell material as an outer coating layer. It can be utilized to develop sensitive methods for the detection of specific biological entities, such as microbial species, their transcription products, and single genes etc. The goal of current research is to synthesize CdTe and core-shell CdTe/ZnS quantum dots (QDs) with an improved process, and to investigate their properties. Well-dispersed CdTe core was prepared in aqueous phase with using 3-mercaptopropionic acid (MPA) as stabilizer under conditions of pH
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50

Souza, Sinval E. G., Luciana Malavolta, Luiggi F. Salomoni, et al. "Evaluation of 4-tert-Butyl-Benzhydrylamine Resin (BUBHAR) as an Alternative Solid Support for Peptide Synthesis." International Journal of Polymer Science 2020 (May 26, 2020): 1–7. http://dx.doi.org/10.1155/2020/5479343.

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Following preliminary reports that introduced 4-tert-butylbenzhydrylamine resin (BUBHAR) as a novel polymer for use in solid-phase peptide chemistry (SPPS), some physical-chemical properties of its structure, certainly relevant for its application in this methodology, were compared with those of the largely used methylbenzhydrylamine resin (MBHAR). In order to rule out possible MBHAR-related commercial source effects for SPPS, we initially compared MBHAR batches acquired from three different manufacturers with homemade BUBHARs. The bead solvation properties of these two resins in solvents used
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