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Yang X, Jia Z, Cheng X, Luo N, Choi MMF. Synthesis of N-acetyl-l-cysteine capped Mn:doped CdS quantum dots for quantitative detection of copper ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 199:455-461. [PMID: 29655131 DOI: 10.1016/j.saa.2018.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 03/31/2018] [Accepted: 04/04/2018] [Indexed: 06/08/2023]
Abstract
In this work, a new assembled copper ions sensor based on the Mn metal-enhanced fluorescence of N-acetyl-l-cysteine protected CdS quantum dots (NAC-Mn:CdS QDs) was developed. The NAC and Mn:CdS QDs nanoparticles were assembled into NAC-Mn:CdS QDs complexes through the formation of CdS and MnS bonds. As compared to NAC capped CdS QDs, higher fluorescence quantum yields of NAC-Mn:CdS QDs was observed, which is attributed to the surface plasmon resonance of Mn metal. In addition, the fluorescence intensity of as-formed complexes weakened in the presence of copper ions. The decrease in fluorescence intensity presented a linear relationship with copper ions concentration in the range from 0.16-3.36μM with a detection limit of 0.041μM . The characterization of as-formed QDs was analyzed by photoluminescence (PL), ultra violet-visible (UV-vis), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and energy dispersive spectroscopy (EDS) respectively. Furthermore, the recoveries and relative standard deviations of Cu2+ spiked in real water samples for the intra-day and inter-day analyses were 88.20-117.90, 95.20-109.90, 0.80-5.80 and 1.20-3.20%, respectively. Such a metal-enhanced QDs fluorescence system may have promising application in chemical and biological sensors.
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Affiliation(s)
- Xiupei Yang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, PR China.
| | - Zhihui Jia
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, PR China
| | - Xiumei Cheng
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, PR China
| | - Na Luo
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, PR China
| | - Martin M F Choi
- Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, Hong Kong SAR, PR China.
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2
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FUKUDA T, KURABAYASHI T, FUNAKI N, UDAKA H, SUZUKI M. Precise Fractionation of CdSe/ZnS Quantum Dot-Organic-Dye Conjugates Using a Gel Filtration Column. ANAL SCI 2016; 32:529-34. [DOI: 10.2116/analsci.32.529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Takeshi FUKUDA
- Department of Functional Materials Science, Saitama University
| | | | - Nayuta FUNAKI
- Department of Functional Materials Science, Saitama University
| | - Hikari UDAKA
- Department of Functional Materials Science, Saitama University
| | - Miho SUZUKI
- Department of Functional Materials Science, Saitama University
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3
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Rodríguez-Cantó PJ, Abargues R, Gordillo H, Suárez I, Chirvony V, Albert S, Martínez-Pastor J. UV-patternable nanocomposite containing CdSe and PbS quantum dots as miniaturized luminescent chemo-sensors. RSC Adv 2015. [DOI: 10.1039/c4ra02812k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
We have developed a patternable nanocomposite sensor based on luminescent CdSe QDs and a polyisoprene-based photoresist (PIP) as host matrix that showed chemosensing response against MET and EDA in vapour with a LOD around 0.1 pg and 15 ng, respectively.
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Affiliation(s)
| | | | - Henry Gordillo
- Instituto de Ciencia de los Materiales
- Universidad de Valencia
- 46071 Valencia
- Spain
| | - Isaac Suárez
- Instituto de Ciencia de los Materiales
- Universidad de Valencia
- 46071 Valencia
- Spain
| | - Vladimir Chirvony
- Instituto de Ciencia de los Materiales
- Universidad de Valencia
- 46071 Valencia
- Spain
| | | | - Juan Martínez-Pastor
- Instituto de Ciencia de los Materiales
- Universidad de Valencia
- 46071 Valencia
- Spain
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4
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Abdollahi H, Shamsipur M, Barati A. Kinetic fluorescence quenching of CdS quantum dots in the presence of Cu(II): chemometrics-assisted resolving of the kinetic data and quantitative analysis of Cu(II). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 127:137-143. [PMID: 24632167 DOI: 10.1016/j.saa.2014.02.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 12/05/2013] [Accepted: 02/09/2014] [Indexed: 06/03/2023]
Abstract
In this work, the kinetic fluorescence behavior of CdS quantum dots (QDs) in the presence of Cu(II) was investigated. In contrast to some other transition metal ions such as Ag(I), Ni(II), and Hg(II), a gradual red-shift in the emission spectrum of CdS QDs was observed for Cu(II) during the reaction course. More investigations revealed the existence of two chemical components in the recorded kinetic data in the presence of Cu(II). Multivariate curve resolution-alternating least squares (MCR-ALS) method was applied in order to extract pure emission spectra and time-dependent profiles of these two components at different concentrations of Cu(II). The results obtained from resolving the data by MCR-ALS got some information about the mechanism of the interaction between CdS QDs and Cu(II) ions which were in good agreement with those reported in the literature. Moreover, the multivariate method of analysis, partial least-squares (PLS) method, was used to develop a multivariate calibration model for quantitative analysis of Cu(II) using the entire kinetic data sets. The calibration and validation sets were created ranging from 0.02 to 1μM of Cu(II) and were successfully calibrated and predicted by the PLS model. This method allowed a sensitive determination of Cu(II) ions with a detection limit of 13nM based on three times of the standard deviation corresponding to PLS regression.
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Affiliation(s)
- Hamid Abdollahi
- Faculty of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran.
| | | | - Ali Barati
- Faculty of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran
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5
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Zhao SM, Han SQ. Thioglycolic Acid Capped CdS Quantum Dots as Fluorescence Probe for Ultrasensitive Determination of Tetracycline and Oxytetracycline. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201000200] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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6
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Shen Y, Liu S, He Y. Fluorescence quenching investigation on the interaction of glutathione-CdTe/CdS quantum dots with sanguinarine and its analytical application. LUMINESCENCE 2013; 29:176-82. [PMID: 23640753 DOI: 10.1002/bio.2525] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Revised: 03/10/2013] [Accepted: 03/24/2013] [Indexed: 11/05/2022]
Abstract
Water-soluble glutathione (GSH)-capped core/shell CdTe/CdS quantum dots (QDs) were synthesized. In pH5.4 sodium phosphate buffer medium, the interaction between GSH-CdTe/CdS QDs and sanguinarine (SA) was investigated by spectroscopic methods, including fluorescence spectroscopy and ultraviolet-visible absorption spectroscopy. Addition of SA to GSH-CdTe/CdS QDs results in fluorescence quenching of GSH-CdTe/CdS QDs. Quenching intensity was in proportion to the concentration of SA in a certain range. Investigation of the quenching mechanism, proved that the fluorescence quenching of GSH-CdTe/CdS QDs by SA is a result of electron transfer. Based on the quenching of the fluorescence of GSH-CdTe/CdS QDs by SA, a novel, simple, rapid and specific method for SA determination was proposed. The detection limit for SA was 3.4 ng/mL and the quantitative determination range was 0.2-40.0 µg/mL with a correlation coefficient of 0.9988. The method has been applied to the determination of SA in synthetic samples and fresh urine samples of healthy human with satisfactory results.
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Affiliation(s)
- Yizhong Shen
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
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7
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Bardajee GR, Hooshyar Z, Jafarpour F. Antibacterial and optical properties of a new water soluble CdSe quantum dots coated by multidentate biopolymer. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2012.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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8
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Wadhavane PD, Galian RE, Izquierdo MA, Aguilera-Sigalat J, Galindo F, Schmidt L, Burguete MI, Pérez-Prieto J, Luis SV. Photoluminescence Enhancement of CdSe Quantum Dots: A Case of Organogel–Nanoparticle Symbiosis. J Am Chem Soc 2012; 134:20554-63. [DOI: 10.1021/ja310508r] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Prashant D. Wadhavane
- Universitat Jaume I, Departamento de Química Inorgánica
y Orgánica, Av. Sos Baynat, s/n, E-12071 Castellón,
Spain
| | - Raquel E. Galian
- Instituto de Ciencia
Molecular, Universidad de Valencia, c/Catedrático
José
Beltrán 2, Paterna, 46980 Valencia, Spain
- Departamento de Química
Analítica, Edificio de Investigación, Universidad de Valencia, Dr. Moliner 50, 46100 Burjassot, Valencia,
Spain
| | - M. Angeles Izquierdo
- Universitat Jaume I, Departamento de Química Inorgánica
y Orgánica, Av. Sos Baynat, s/n, E-12071 Castellón,
Spain
| | - Jordi Aguilera-Sigalat
- Instituto de Ciencia
Molecular, Universidad de Valencia, c/Catedrático
José
Beltrán 2, Paterna, 46980 Valencia, Spain
| | - Francisco Galindo
- Universitat Jaume I, Departamento de Química Inorgánica
y Orgánica, Av. Sos Baynat, s/n, E-12071 Castellón,
Spain
| | - Luciana Schmidt
- Instituto de Ciencia
Molecular, Universidad de Valencia, c/Catedrático
José
Beltrán 2, Paterna, 46980 Valencia, Spain
| | - M. Isabel Burguete
- Universitat Jaume I, Departamento de Química Inorgánica
y Orgánica, Av. Sos Baynat, s/n, E-12071 Castellón,
Spain
| | - Julia Pérez-Prieto
- Instituto de Ciencia
Molecular, Universidad de Valencia, c/Catedrático
José
Beltrán 2, Paterna, 46980 Valencia, Spain
| | - Santiago V. Luis
- Universitat Jaume I, Departamento de Química Inorgánica
y Orgánica, Av. Sos Baynat, s/n, E-12071 Castellón,
Spain
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9
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Hu M, Yu H, Wei F, Xu G, Yang J, Cai Z, Hu Q. Citrate-capped Mn-modified CdSe/CdS quantum dots as luminescent probes for levodopa detection in aqueous solution. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 91:130-135. [PMID: 22366624 DOI: 10.1016/j.saa.2012.01.081] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 01/13/2012] [Accepted: 01/30/2012] [Indexed: 05/31/2023]
Abstract
A novel kind of citrate capped Mn-modified CdSe/CdS quantum dots (QDs) was developed. The Mn-modified CdSe/CdS QDs had a narrow, symmetric emission and strong fluorescence with quantum yield over 41%. The interaction between the QDs and levodopa was investigated. The results showed that levodopa selectively quenched the fluorescence intensity of the QDs. Based on the fluorescence quenching of the synthesized QDs by levodopa, a simple, rapid and specific quantitative method for levodopa was proposed. The factors affecting the fluorescence detection for levodopa were studied. Under the optimum conditions, the quenched intensity of the fluorescence versus levodopa concentration from 1 to 100 μM gave a linear response with an excellent correlation coefficient of 0.9996, and the limit of detection (3σ/K) was 2 × 10(-7)M. The contents of levodopa in pharmaceutical tablets were determined by the proposed method and the results agreed with the claimed values.
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Affiliation(s)
- Miao Hu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 210029, PR China
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10
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Carrillo-Carrión C, Simonet BM, Valcárcel M. (CdSe/ZnS QDs)-ionic liquid-based headspace single drop microextraction for the fluorimetric determination of trimethylamine in fish. Analyst 2012; 137:1152-9. [DOI: 10.1039/c2an15914g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Carrillo-Carrión C, Simonet BM, Valcárcel M. Determination of amines based on their interaction with QDs: Effect of the formation QD-assemblies. Anal Chim Acta 2011; 703:212-8. [DOI: 10.1016/j.aca.2011.06.052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 06/14/2011] [Accepted: 06/28/2011] [Indexed: 11/25/2022]
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12
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Peng J, Nong K, Mu G, Huang F. CdTe Quantum Dots as Fluorescent Probes for Josamycin Determination. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.8.2727] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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14
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Gore AH, Mote US, Tele SS, Anbhule PV, Rath MC, Patil SR, Kolekar GB. A novel method for ranitidine hydrochloride determination in aqueous solution based on fluorescence quenching of functionalised CdS QDs through photoinduced charge transfer process: spectroscopic approach. Analyst 2011; 136:2606-12. [PMID: 21519628 DOI: 10.1039/c0an01038c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel method for the quantitative determination of ranitidine hydrochloride (RNH) based on the fluorescence quenching of functionalised CdS quantum dots (QDs) by RNH in aqueous solution was proposed. The method is simple, rapid, specific and highly sensitive with good precision. The thioglycolic acid (TGA)-capped CdS QDs were synthesized from cadmium nitrate and sodium sulfide in alkaline solution. Under the optimal conditions, the Stern-Volmer calibration plot of F(0)/F against concentration of RNH was linear in the range of 0.50-15.0 μg mL(-1) with a correlation coefficient of 0.996. The limit of detection (LOD) was 0.38 μg mL(-1). The method was satisfactorily applied to the direct determination of RNH in pharmaceutical formulations with no significant interference from excipients. The results were found to be in good agreement with those obtained by the reference method and the claimed value. The accuracy and reliability of the method were further ascertained by recovery studies via the standard-addition method, with percentage recoveries in the range of 98.47 to 102.30%. The possible fluorescence quenching mechanism for the reaction was also discussed.
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Affiliation(s)
- Anil Hanumant Gore
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India
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15
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CdSe quantum dots capped PAMAM dendrimer nanocomposites for sensing nitroaromatic compounds. Talanta 2011; 83:1335-40. [DOI: 10.1016/j.talanta.2010.10.056] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2010] [Revised: 10/20/2010] [Accepted: 10/29/2010] [Indexed: 11/19/2022]
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16
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Dong W, Shen HB, Liu XH, Li MJ, Li LS. CdSe/ZnS quantum dots based fluorescence quenching method for determination of paeonol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:537-542. [PMID: 21147020 DOI: 10.1016/j.saa.2010.11.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 11/17/2010] [Accepted: 11/18/2010] [Indexed: 05/30/2023]
Abstract
Aqueous polymethylmethacrylate (PMMA)-capped CdSe/ZnS quantum dots were used as fluorescence probes for paeonol determination. Based on the fluorescence quenching of aqueous CdSe/ZnS quantum dots caused by paeonol, a simple, sensitive and rapid method was developed. Under the optimal conditions, with excitation and emission wavelengths at 350 nm and 620 nm, respectively, the calibration plot of F0-F with concentration of paeonol was linear in the range of 25.04-175.2 mg L(-1) with correlation coefficient of 0.9986. The limit of detection was 0.017 mg L(-1). The concentration of paeonol in paeonol ointment was determined by the proposed method and the result agreed with the claimed value. Furthermore, the possible fluorescence quenching mechanism was discussed.
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Affiliation(s)
- Wei Dong
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
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17
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Baker DR, Kamat PV. Tuning the emission of CdSe quantum dots by controlled trap enhancement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11272-6. [PMID: 20373780 DOI: 10.1021/la100580g] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Ligand exchange with 3-mercaptopropionic acid (MPA) has been successfully used to tune the emission intensity of trioctylphosphineoxide/dodecylamine-capped CdSe quantum dots. Addition of 3-mercaptopropionic acid (MPA) to CdSe quantum dot suspension enhances the deep trap emission with concurrent quenching of the band edge emission. The smaller sized quantum dots, because of larger surface/volume ratio, create a brighter trap emission and are more easily tuned. An important observation is that the deep trap emission which is minimal after synthesis is brightened to have a quantum yield of 1-5% and can be tuned based on the concentration of MPA in solution with the quantum dots. Photoluminescence decay and transient absorption measurements reveal the role of surface bound MPA in altering the photophysical properties of CdSe quantum dots.
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Affiliation(s)
- David R Baker
- Radation Laboratory, Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA
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18
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Chanu TI, Negi DP. Synthesis of histidine-stabilized cadmium sulfide quantum dots: Study of their fluorescence behaviour in the presence of adenine and guanine. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.03.068] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Cao M, Liu M, Cao C, Xia Y, Bao L, Jin Y, Yang S, Zhu C. A simple fluorescence quenching method for berberine determination using water-soluble CdTe quantum dots as probes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:1043-1046. [PMID: 20093069 DOI: 10.1016/j.saa.2009.12.050] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2009] [Revised: 12/06/2009] [Accepted: 12/14/2009] [Indexed: 05/28/2023]
Abstract
A novel method for the determination of berberine has been developed based on quenching of the fluorescence of thioglycolic acid-capped CdTe quantum dots (TGA-CdTe QDs) by berberine in aqueous solutions. Under optimum conditions, the relative fluorescence intensity was linearly proportional to the concentration of berberine between 2.5x10(-8) and 8.0x10(-6)mol L(-1) with a detection limit of 6.0x10(-9)mol L(-1). The method has been applied to the determination of berberine in real samples, and satisfactory results were obtained. The mechanism of the proposed reaction was also discussed.
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Affiliation(s)
- Ming Cao
- Anhui Key Laboratory of Chemo-Biosensing, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, PR China
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20
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Kalasad MN, Rabinal MK, Mulimani BG. Ambient synthesis and characterization of high-quality CdSe quantum dots by an aqueous route. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:12729-35. [PMID: 19711933 DOI: 10.1021/la901798y] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Herein, we report the ambient synthesis of CdSe nanoparticles of widely tunable particle size by a solution route. The proposed protocol uses hydrazine hydrate to form an air-stable complex of selenium. These nanoparticles are characterized by X-ray diffraction, FTIR, optical absorption, photoluminescence, and transmission electron microcopy measurements. By varying the molarities of Cd(2+) and Se(2-) ions in solution with 3-mercaptopropionic acid as the capping ligand, the method permits us to synthesize nanoparticles of size ranging from 1.58 to 3.42 nm (estimated from optical absorption edge measurements) by controlling the annealing time of the starting colloid at 100 degrees C. The extracted quantum dots are of high quality (40% photoluminescence quantum yield) and exhibit colors ranging from deep blue to red. The resulting colloids are very stable, and no precipitate is observed over a period of 6 months. Thus, the method is simple and easily scalable to synthesize fluorescent CdSe nanoparticles.
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Affiliation(s)
- M N Kalasad
- Department of Physics, Karnatak University, Dharwad-580003, India
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21
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Frasco MF, Chaniotakis N. Semiconductor quantum dots in chemical sensors and biosensors. SENSORS 2009; 9:7266-86. [PMID: 22423206 PMCID: PMC3290488 DOI: 10.3390/s90907266] [Citation(s) in RCA: 212] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Revised: 09/03/2009] [Accepted: 09/08/2009] [Indexed: 12/05/2022]
Abstract
Quantum dots are nanometre-scale semiconductor crystals with unique optical properties that are advantageous for the development of novel chemical sensors and biosensors. The surface chemistry of luminescent quantum dots has encouraged the development of multiple probes based on linked recognition molecules such as peptides, nucleic acids or small-molecule ligands. This review overviews the design of sensitive and selective nanoprobes, ranging from the type of target molecules to the optical transduction scheme. Representative examples of quantum dot-based optical sensors from this fast-moving field have been selected and are discussed towards the most promising directions for future research.
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Affiliation(s)
- Manuela F Frasco
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Crete, Vassilika Voutes, 71003 Iraklion, Crete, Greece; E-Mail:
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23
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Galian RE, Scaiano JC. Fluorescence quenching of CdSe quantum dots by tertiary amines and their surface binding effect. Photochem Photobiol Sci 2009; 8:70-4. [DOI: 10.1039/b807580h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Dong F, Hu K, Han H, Liang J. A novel method for methimazole determination using CdSe quantum dots as fluorescence probes. Mikrochim Acta 2008. [DOI: 10.1007/s00604-008-0120-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Dong F, Han H, Liang J, Lu D. Study on the interaction between 2-mercaptoethanol, dimercaprol and CdSe quantum dots. LUMINESCENCE 2008; 23:321-6. [DOI: 10.1002/bio.1038] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Li J, Li M, Tang J, Li X, Zhang H, Zhang Y. Resonance light-scattering spectrometric study of interaction between enzyme and MPA-modified CdTe nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 70:514-8. [PMID: 17851121 DOI: 10.1016/j.saa.2007.07.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2007] [Revised: 07/20/2007] [Accepted: 07/27/2007] [Indexed: 05/17/2023]
Abstract
This paper described a novel assay of enzyme based on the measurement of enhanced resonance light-scattering (RLS) signals resulting from the electrostatic and coordination interaction of functionalized CdTe nanoparticles with enzyme. The CdTe nanoparticles which were modified with 3-mercaptocarboxylic acid (MPA) have abundant carboxylic groups (COOH). So the nanoparticles are water-soluble, stable and biocompatible. At pH 8.3 phosphate buffered saline (PBS), the RLS signals of functionalized nano-CdTe are greatly enhanced by bromelain and papain in the region of 220-800 nm characterized by the peak around 318-314 nm, respectively. The optimization conditions of the reaction were also examined and selected. Under the selected conditions, the enhanced RLS intensity is linearly proportional to the concentration of bromelain and papain. The liner range is (0.09-0.9) x 10(-6)mol/L for bromelain and (0.048-0.702) x 10(-6)mol/L for papain. The influences of some foreign substances were also examined. This method can be applied to the determination of enzyme.
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Affiliation(s)
- Juan Li
- College of Chemistry, Jilin University, Changchun 130012, PR China
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Shi GH, Shang ZB, Wang Y, Jin WJ, Zhang TC. Fluorescence quenching of CdSe quantum dots by nitroaromatic explosives and their relative compounds. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 70:247-52. [PMID: 17870656 DOI: 10.1016/j.saa.2007.07.054] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2006] [Revised: 07/12/2007] [Accepted: 07/24/2007] [Indexed: 05/17/2023]
Abstract
CdSe quantum dots (QDs) were synthesized in oleic acid and octadecene medium under high-temperature and dispersed in chloroform. Nitroaromatic explosives and their relative compounds, 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), nitrobenzene (NB), 2,4-dinitrochlorobenzene (DNBCl) and p-nitrotoluene (NT) can obviously cause the fluorescence quenching of the synthesized QDs. Under the optimum conditions, a nonlinear response was observed over the concentration range of 10(-8) to 10(-5) M for them all. The modified Stern-Volmer quenching equations of ln I(0)/I versus C show a good linear relation in 10(-5) M order of magnitude, and the detection limits approach 10(-6) to 10(-7) M.
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Affiliation(s)
- Guo Hua Shi
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
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Hu DH, Wu HM, Liang JG, Han HY. Study on the interaction between CdSe quantum dots and hemoglobin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 69:830-4. [PMID: 17625958 DOI: 10.1016/j.saa.2007.05.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Revised: 04/07/2007] [Accepted: 05/14/2007] [Indexed: 05/16/2023]
Abstract
The interaction between CdSe quantum dots (QDs) and hemoglobin (Hb) was investigated by ultraviolet and visible (UV-vis) absorption spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and fluorescence (FL) spectroscopy. The intensity of UV-vis absorption spectrum of a mixture of CdSe QDs and Hb was obviously changed at the wavelength of 406nm at pH 7.0, indicating that CdSe QDs could bind with Hb. The influences of some factors on the interactions between CdSe QDs and Hb were studied in detail. The binding molar ratio of CdSe QDs and Hb was 12:1 by a mole-ratio method. The mechanism of the interaction between CdSe QDs and Hb was also discussed.
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Affiliation(s)
- De-Hong Hu
- College of Science, State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
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