151
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Kafshgari MH, Voelcker NH, Harding FJ. Applications of zero-valent silicon nanostructures in biomedicine. Nanomedicine (Lond) 2015; 10:2553-71. [DOI: 10.2217/nnm.15.91] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Zero-valent, or elemental, silicon nanostructures exhibit a number of properties that render them attractive for applications in nanomedicine. These materials hold significant promise for improving existing diagnostic and therapeutic techniques. This review summarizes some of the essential aspects of the fabrication techniques used to generate these fascinating nanostructures, comparing their material properties and suitability for biomedical applications. We examine the literature in regards to toxicity, biocompatibility and biodistribution of silicon nanoparticles, nanowires and nanotubes, with an emphasis on surface modification and its influence on cell adhesion and endocytosis. In the final part of this review, our attention is focused on current applications of the fabricated silicon nanostructures in nanomedicine, specifically examining drug and gene delivery, bioimaging and biosensing.
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Affiliation(s)
- Morteza Hasanzadeh Kafshgari
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Mawson Institute, University of South Australia, GPO Box 2471, Adelaide, SA, 5001, Australia
| | - Nicolas H Voelcker
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Mawson Institute, University of South Australia, GPO Box 2471, Adelaide, SA, 5001, Australia
| | - Frances J Harding
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Mawson Institute, University of South Australia, GPO Box 2471, Adelaide, SA, 5001, Australia
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152
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Whitcomb KJ, Geisenhoff JQ, Ryan DP, Gelfand MP, Van Orden A. Photon Antibunching in Small Clusters of CdSe/ZnS Core/Shell Quantum Dots. J Phys Chem B 2015; 119:9020-8. [PMID: 25232642 DOI: 10.1021/jp5083856] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Coincident photon histogram measurements of fluorescence antibunching via confocal microscopy correlated with atomic force microscopy were carried out on (i) individual CdSe/ZnS core/shell quantum dots (QDs), (ii) several well separated QDs, and (iii) clusters of QDs. Individual QDs and well separated QDs showed the expected degree of antibunching for a single emitter and several independent emitters, respectively. The degree of antibunching in small, compact clusters was more characteristic of a single emitter than multiple emitters. The antibunching in clusters provides strong evidence of nonradiative energy transfer between QDs in a cluster. A minimal phenomenological model of energy transfer gives reasonable quantitative agreement with the experimental results.
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Affiliation(s)
- Kevin J Whitcomb
- †Department of Chemistry and ‡Department of Physics, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jessica Q Geisenhoff
- †Department of Chemistry and ‡Department of Physics, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Duncan P Ryan
- †Department of Chemistry and ‡Department of Physics, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Martin P Gelfand
- †Department of Chemistry and ‡Department of Physics, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Alan Van Orden
- †Department of Chemistry and ‡Department of Physics, Colorado State University, Fort Collins, Colorado 80523, United States
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153
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Feugang JM, Youngblood RC, Greene JM, Willard ST, Ryan PL. Self-illuminating quantum dots for non-invasive bioluminescence imaging of mammalian gametes. J Nanobiotechnology 2015; 13:38. [PMID: 26040273 PMCID: PMC4455054 DOI: 10.1186/s12951-015-0097-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 05/13/2015] [Indexed: 01/17/2023] Open
Abstract
Background The fertility performance of animals is still a mystery and the full comprehension of mammalian gametes maturation and early embryonic development remains to be elucidated. The recent development in nanotechnology offers a new opportunity for real-time study of reproductive cells in their physiological environments. As a first step toward that goal, we evaluated the effectiveness of a fluorescent and luminescent nanoparticle for in vitro and ex vivo imaging of porcine gametes. Methods Freshly harvested boar sperm were labeled with red-shifted (655 nm) quantum dot nanoparticles conjugated (QD+) or not (QD−) with plasminogen antibody and evaluated. Subsets of labeled spermatozoa were loaded into straws and placed within the lumen of gilt reproductive tracts for ex vivo intra-uterine imaging. Porcine cumulus-oocyte complexes (COCs) were matured in the presence of QD− or QD+. Ovarian follicles were microinjected with QD− or QD+ and placed in culture for up to 4 days. After labeling, all samples were supplemented with coelenterazine, the luciferase substrate, and immediately submitted to bioluminescence analysis, followed by fluorescence and hyperspectral imaging. Data were analyzed with ANOVA and P < 0.05 indicated significant differences. Results All labeled-samples revealed bioluminescence emission that was confirmed by fluorescence and hyperspectral imaging of the QD localization within the cells and tissues. Over 76% of spermatozoa and both immature and mature COCs were successfully labeled with QD− or QD+. The QD− fluorescence appeared homogenously distributed in the oocytes, while found in the entire sperm length with a higher accumulation within the mid-piece. Labeled-follicles exhibited a progressive migration of QD nanoparticles within the follicle wall during culture. In contrast, QD+ fluorescence signals appeared condensed and stronger in the follicle cells, sperm head, and sub-plasma membrane area of mature oocytes. Weaker QD+ signals were detected in the cumulus cells. Fluorescence and hyperspectral microscope imaging showed comparable intracellular QD localization. Ex-vivo intra-uterine bioluminescence imaging of labeled spermatozoa revealed stronger signals captured over the oviducts, with uterine body allowing the lowest signal detection. Conclusion Findings indicate that conjugated and non-conjugated fluorescent nanoparticles can be used for effective labeling of mammalian gametes for in vitro monitoring and potential in vivo targeted-imaging. Electronic supplementary material The online version of this article (doi:10.1186/s12951-015-0097-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jean M Feugang
- Department of Animal and Dairy Sciences, Facility for Organismal and Cellular Imaging (FOCI), Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Ramey C Youngblood
- Department of Animal and Dairy Sciences, Facility for Organismal and Cellular Imaging (FOCI), Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Jonathan M Greene
- Department of Animal and Dairy Sciences, Facility for Organismal and Cellular Imaging (FOCI), Mississippi State University, Mississippi State, MS, 39762, USA. .,Department of Pathobiology and Population Medicine, Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Scott T Willard
- Department of Animal and Dairy Sciences, Facility for Organismal and Cellular Imaging (FOCI), Mississippi State University, Mississippi State, MS, 39762, USA. .,Department of Biochemistry and Molecular Biology and Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Peter L Ryan
- Department of Animal and Dairy Sciences, Facility for Organismal and Cellular Imaging (FOCI), Mississippi State University, Mississippi State, MS, 39762, USA. .,Department of Pathobiology and Population Medicine, Mississippi State University, Mississippi State, MS, 39762, USA.
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154
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Gao Y, Dong Q, Lan S, Cai Q, Simalou O, Zhang S, Gao G, Chokto H, Dong A. Decorating CdTe QD-Embedded Mesoporous Silica Nanospheres with Ag NPs to Prevent Bacteria Invasion for Enhanced Anticounterfeit Applications. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10022-10033. [PMID: 25901940 DOI: 10.1021/acsami.5b02472] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Quantum dots (QDs) as potent candidates possess advantageous superiority in fluorescence imaging applications, but they are susceptible to the biological circumstances (e.g., bacterial environment), leading to fluorescence quenching or lose of fluorescent properties. In this work, CdTe QDs were embedded into mesoporous silica nanospheres (m-SiO2 NSs) for preventing QD agglomeration, and then CdTe QD-embedded m-SiO2 NSs (m-SiO2/CdTe NSs) were modified with Ag nanoparticles (Ag NPs) to prevent bacteria invasion for enhanced anticounterfeit applications. The m-SiO2 NSs, which serve as intermediate layers to combine CdTe QDs with Ag NPs, help us establish a highly fluorescent and long-term antibacterial system (i.e., m-SiO2/CdTe/Ag NSs). More importantly, CdTe QD-embedded m-SiO2 NSs showed fluorescence quenching when they encounter bacteria, which was avoided by attaching Ag NPs outside. Ag NPs are superior to CdTe QDs for preventing bacteria invasion because of the structure (well-dispersed Ag NPs), size (small diameter), and surface charge (positive zeta potentials) of Ag NPs. The plausible antibacterial mechanisms of m-SiO2/CdTe/Ag NSs toward both Gram-positive and Gram-negative bacteria were established. As for potential applications, m-SiO2/CdTe/Ag NSs were developed as fluorescent anticounterfeiting ink for enhanced imaging applications.
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Affiliation(s)
| | | | - Shi Lan
- ⊥College of Science, Inner Mongolia Agricultural University, Hohhot 010018, People's Republic of China
| | | | - Oudjaniyobi Simalou
- ||Département de Chimie, Faculté Des Sciences (FDS), Université de Lomé (UL), BP 1515 Lome, Togo
| | - Shiqi Zhang
- #PhD School of Materiaux, Mechanics, Environnement, Energy, Process and Production Engineering (I-MEP2), University of Grenoble, Grenoble 38031, France
| | - Ge Gao
- △College of Chemistry, Jilin University, Changchun 130021, People's Republic of China
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155
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Liu Z, Lin Z, Liu L, Su X. A convenient and label-free fluorescence “turn off–on” nanosensor with high sensitivity and selectivity for acid phosphatase. Anal Chim Acta 2015; 876:83-90. [DOI: 10.1016/j.aca.2015.03.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 03/16/2015] [Accepted: 03/18/2015] [Indexed: 10/23/2022]
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156
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Li F, Wang J, Sun S, Wang H, Tang Z, Nie G. Facile Synthesis of pH-sensitive Germanium Nanocrystals with High Quantum Yield for Intracellular Acidic Compartment Imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:1954-1961. [PMID: 25641905 DOI: 10.1002/smll.201402743] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/11/2014] [Indexed: 06/04/2023]
Abstract
A green-light emitting germanium nanocrystal-based biosensor to monitor lysosomal pH changes is developed. The Ge nanocrystals are synthesized in an aqueous solution with a significantly enhanced photoluminescence quantum yield of 26%. This synthesis involves a facile solution based route which avoided the use of toxic or environmentally unfriendly agents. Importantly, the photoluminescence intensity of the synthesized Ge nanocrystals is particularly sensitive to changes in pH between 5 and 6. When incubated with cultured cells, the nanocrystals are internalized and subsequently translocated via the lysosomal pathway, and the Ge nanocrystals' fluorescence are greatly enhanced, even when the lysosomal pH is only slightly increased. These results reveal that the Ge nanocrystals possess high pH sensitivity compared to a commercially available dye, LysoSensor Green DND-189. The fluorescent properties of the Ge nanocrystals are demonstrated to be dependent on both the crystal form and their surface chemistry. The superior fluorescence properties and bioapplicability of the Ge nanocrystals makes them a promising intracellular bioimaging probe for monitoring various pH-sensitive processes in cells.
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Affiliation(s)
- Feng Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, National Center for Nanoscience and Technology, Beijing, 100190, China; Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
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157
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Jiang K, Sun S, Zhang L, Lu Y, Wu A, Cai C, Lin H. Red, Green, and Blue Luminescence by Carbon Dots: Full-Color Emission Tuning and Multicolor Cellular Imaging. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501193] [Citation(s) in RCA: 159] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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158
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Jiang K, Sun S, Zhang L, Lu Y, Wu A, Cai C, Lin H. Red, Green, and Blue Luminescence by Carbon Dots: Full-Color Emission Tuning and Multicolor Cellular Imaging. Angew Chem Int Ed Engl 2015; 54:5360-3. [DOI: 10.1002/anie.201501193] [Citation(s) in RCA: 1255] [Impact Index Per Article: 139.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Indexed: 01/08/2023]
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159
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Li N, Su X, Lu Y. Nanomaterial-based biosensors using dual transducing elements for solution phase detection. Analyst 2015; 140:2916-43. [PMID: 25763412 DOI: 10.1039/c4an02376e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Biosensors incorporating nanomaterials have demonstrated superior performance compared to their conventional counterparts. Most reported sensors use nanomaterials as a single transducer of signals, while biosensor designs using dual transducing elements have emerged as new approaches to further improve overall sensing performance. This review focuses on recent developments in nanomaterial-based biosensors using dual transducing elements for solution phase detection. The review begins with a brief introduction of the commonly used nanomaterial transducers suitable for designing dual element sensors, including quantum dots, metal nanoparticles, upconversion nanoparticles, graphene, graphene oxide, carbon nanotubes, and carbon nanodots. This is followed by the presentation of the four basic design principles, namely Förster Resonance Energy Transfer (FRET), Amplified Fluorescence Polarization (AFP), Bio-barcode Assay (BCA) and Chemiluminescence (CL), involving either two kinds of nanomaterials, or one nanomaterial and an organic luminescent agent (e.g. organic dyes, luminescent polymers) as dual transducers. Biomolecular and chemical analytes or biological interactions are detected by their control of the assembly and disassembly of the two transducing elements that change the distance between them, the size of the fluorophore-containing composite, or the catalytic properties of the nanomaterial transducers, among other property changes. Comparative discussions on their respective design rules and overall performances are presented afterwards. Compared with the single transducer biosensor design, such a dual-transducer configuration exhibits much enhanced flexibility and design versatility, allowing biosensors to be more specifically devised for various purposes. The review ends by highlighting some of the further development opportunities in this field.
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Affiliation(s)
- Ning Li
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, 117602 Singapore.
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160
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Zhang X, Yang S, Zhao W, Liu B, Sun L, Luo A. Surface Molecular Imprinting on Manganese-Doped Zinc Sulfide Quantum Dots for Fluorescence Detection of Bisphenol A in Water. ANAL LETT 2015. [DOI: 10.1080/00032719.2015.1010121] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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161
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A novel and convenient near-infrared fluorescence “turn off–on” nanosensor for detection of glucose and fluoride anions. Biosens Bioelectron 2015; 65:145-51. [DOI: 10.1016/j.bios.2014.10.008] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 09/23/2014] [Accepted: 10/03/2014] [Indexed: 11/23/2022]
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162
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Synthesis and characterization of water-soluble polythiophene derivatives for cell imaging. Sci Rep 2015; 5:7617. [PMID: 25557020 PMCID: PMC5154596 DOI: 10.1038/srep07617] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 12/03/2014] [Indexed: 11/27/2022] Open
Abstract
In this work, four water-soluble polythiophene derivatives (PT, PT-DDA, PT-ADA, and PT-ADA-PPR) with different pendant moieties were synthesized via oxidative copolymerization by FeCl3. By increasing the hydrophobic ability of side chain moieties, there is a gradually blue shift for the maximum absorption wavelength and red shift for the maximum emission wavelength, a reducing trend for fluorescence quantum yields, a growing trend for Stokes shift, and an increasing trend for the mean sizes in the order of PT, PT-ADA, and PT-DDA. All the synthesized polymers show low toxicity and good photostability and accumulate in the lysosomes of A549 cells. Furthermore, the introduction of porphyrin group to PT-ADA side chain (PT-ADA-PPR) broadens the absorption and emission ranges of PT-ADA. PT-ADA-PPR could be excited at two different excitation wavelengths (488 nm and 559 nm) and exhibits two emission pathways, and dual-color fluorescence images (orange and red) of PT-ADA-PPR accumulated in A549 cells are observed. Thus, PT-ADA-PPR could be used as an excellent dual-color fluorescent and lysosome-specific imaging material.
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163
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Wegner KD, Hildebrandt N. Quantum dots: bright and versatile in vitro and in vivo fluorescence imaging biosensors. Chem Soc Rev 2015; 44:4792-4834. [DOI: 10.1039/c4cs00532e] [Citation(s) in RCA: 562] [Impact Index Per Article: 62.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Colourful cells and tissues: semiconductor quantum dots and their versatile applications in multiplexed bioimaging research.
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Affiliation(s)
- K. David Wegner
- NanoBioPhotonics
- Institut d'Electronique Fondamentale
- Université Paris-Sud
- 91405 Orsay Cedex
- France
| | - Niko Hildebrandt
- NanoBioPhotonics
- Institut d'Electronique Fondamentale
- Université Paris-Sud
- 91405 Orsay Cedex
- France
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164
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Zhang B, Wang Y, Yang C, Hu S, Gao Y, Zhang Y, Wang Y, Demir HV, Liu L, Yong KT. The composition effect on the optical properties of aqueous synthesized Cu–In–S and Zn–Cu–In–S quantum dot nanocrystals. Phys Chem Chem Phys 2015; 17:25133-41. [DOI: 10.1039/c5cp03312h] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The relationship between the optical properties and the compositional variation was investigated in aqueous synthesized Cu–In–S and Zn–Cu–In–S QDs.
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Affiliation(s)
- Butian Zhang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Yucheng Wang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Chengbin Yang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Siyi Hu
- Changchun University of Science and Technology
- Changchun
- P. R. China
| | - Yuan Gao
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Yiping Zhang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Yue Wang
- Changchun University of Science and Technology
- Changchun
- P. R. China
| | - Hilmi Volkan Demir
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Liwei Liu
- Changchun University of Science and Technology
- Changchun
- P. R. China
| | - Ken-Tye Yong
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
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165
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Peng Y, Xiong B, Peng L, Li H, He Y, Yeung ES. Recent advances in optical imaging with anisotropic plasmonic nanoparticles. Anal Chem 2014; 87:200-15. [PMID: 25375954 DOI: 10.1021/ac504061p] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yinhe Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University , Changsha, Hunan 410082, P. R. China
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166
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Recent advances in the field of bionanotechnology: an insight into optoelectric bacteriorhodopsin, quantum dots, and noble metal nanoclusters. SENSORS 2014; 14:19731-66. [PMID: 25340449 PMCID: PMC4239883 DOI: 10.3390/s141019731] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 10/08/2014] [Accepted: 10/15/2014] [Indexed: 12/20/2022]
Abstract
Molecular sensors and molecular electronics are a major component of a recent research area known as bionanotechnology, which merges biology with nanotechnology. This new class of biosensors and bioelectronics has been a subject of intense research over the past decade and has found application in a wide variety of fields. The unique characteristics of these biomolecular transduction systems has been utilized in applications ranging from solar cells and single-electron transistors (SETs) to fluorescent sensors capable of sensitive and selective detection of a wide variety of targets, both organic and inorganic. This review will discuss three major systems in the area of molecular sensors and electronics and their application in unique technological innovations. Firstly, the synthesis of optoelectric bacteriorhodopsin (bR) and its application in the field of molecular sensors and electronics will be discussed. Next, this article will discuss recent advances in the synthesis and application of semiconductor quantum dots (QDs). Finally, this article will conclude with a review of the new and exciting field of noble metal nanoclusters and their application in the creation of a new class of fluorescent sensors.
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167
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Myers RM, Fitzpatrick DE, Turner RM, Ley SV. Flow Chemistry Meets Advanced Functional Materials. Chemistry 2014; 20:12348-66. [DOI: 10.1002/chem.201402801] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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168
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Stanisavljevic M, Chomoucka J, Dostalova S, Krizkova S, Vaculovicova M, Adam V, Kizek R. Interactions between CdTe quantum dots and DNA revealed by capillary electrophoresis with laser-induced fluorescence detection. Electrophoresis 2014; 35:2587-92. [PMID: 24981309 DOI: 10.1002/elps.201400204] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 06/12/2014] [Accepted: 06/18/2014] [Indexed: 12/13/2022]
Abstract
Quantum dots (QDs) are one of the most promising nanomaterials, due to their size-dependent characteristics as well as easily controllable size during the synthesis process. They are promising label material and their interaction with biomolecules is of great interest for science. In this study, CdTe QDs were synthesized under optimal conditions for 2 nm size. Characterization and verification of QDs synthesis procedure were done by fluorimetric method and with CE. Afterwards, QDs interaction with chicken genomic DNA and 500 bpDNA fragment was observed employing CE-LIF and gel electrophoresis. Performed interaction relies on possible matching between size of QDs and major groove of the DNA, which is approximately 2.1 nm.
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Affiliation(s)
- Maja Stanisavljevic
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska, Czech Republic
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169
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Abstract
Lanthanide bioprobes and bioconjugates are ideal luminescent stains in view of their low propensity to photobleaching, sharp emission lines and long excited state lifetimes permitting time-resolved detection for enhanced sensitivity. We show here how the interplay between physical, chemical and biochemical properties allied to microfluidics engineering leads to self-assembled dinuclear lanthanide luminescent probes illuminating live cells and selectively detecting biomarkers expressed by cancerous human breast cells.
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Affiliation(s)
- Jean-Claude G Bünzli
- Institute of Chemical Sciences and Engineering , École Polytechnique Fédérale de Lausanne , BCH 1402, 1015 Lausanne , Switzerland
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170
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Chen Y, Liang H. Applications of quantum dots with upconverting luminescence in bioimaging. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 135:23-32. [DOI: 10.1016/j.jphotobiol.2014.04.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 04/01/2014] [Accepted: 04/07/2014] [Indexed: 10/25/2022]
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171
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Somogyi B, Gali A. Computational design of in vivo biomarkers. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:143202. [PMID: 24651562 DOI: 10.1088/0953-8984/26/14/143202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Fluorescent semiconductor nanocrystals (or quantum dots) are very promising agents for bioimaging applications because their optical properties are superior compared to those of conventional organic dyes. However, not all the properties of these quantum dots suit the stringent criteria of in vivo applications, i.e. their employment in living organisms that might be of importance in therapy and medicine. In our review, we first summarize the properties of an 'ideal' biomarker needed for in vivo applications. Despite recent efforts, no such hand-made fluorescent quantum dot exists that may be considered as 'ideal' in this respect. We propose that ab initio atomistic simulations with predictive power can be used to design 'ideal' in vivo fluorescent semiconductor nanoparticles. We briefly review such ab initio methods that can be applied to calculate the electronic and optical properties of very small nanocrystals, with extra emphasis on density functional theory (DFT) and time-dependent DFT which are the most suitable approaches for the description of these systems. Finally, we present our recent results on this topic where we investigated the applicability of nanodiamonds and silicon carbide nanocrystals for in vivo bioimaging.
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Affiliation(s)
- Bálint Somogyi
- Department of Atomic Physics, Budapest University of Technology and Economics, Budafoki út 8., H-1111, Budapest, Hungary
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172
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Zhang C, Yan J, Liu C, Ji X, He Z. One-pot synthesis of DNA-CdTe:Zn2+ nanocrystals using Na2TeO3 as the Te source. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3189-3194. [PMID: 24512054 DOI: 10.1021/am405864z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
DNA-functionalized quantum dots (QDs) are powerful tools for biosensing and bioimaging applications. Facile labeling methods with good fluorescence properties are desirable for the development of DNA-functionalized QDs. In this article, we describe a novel and simple approach that leads to the synthesis of DNA-functionalized CdTe:Zn(2+) QDs in one step. It is the first time that DNA-functionalized QDs have been prepared using sodium tellurite as the tellurium source by a hydrothermal method. This approach will greatly reduce the synthesis time (only about 1 h) and simplify the synthesis process as well as reduce the complexity of the required experimental techniques. The as-prepared QDs exhibit high quantum yield, small size, and low toxicity. UV-vis spectra and FTIR characterization proved that the abundance of DNA on the surface of the QDs increased with the increase in the concentration of the feed DNA. Most importantly, these QDs functionalized with DNA have great potential to bind specifically to DNA, protein, and cell surface receptors.
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Affiliation(s)
- Cuiling Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, P. R. China
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173
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174
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Xiong Y, Wei M, Wei W, Yin L, Pu Y, Liu S. Detection of DNA damage based on metal-mediated molecular beacon and DNA strands displacement reaction. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:806-810. [PMID: 24152865 DOI: 10.1016/j.saa.2013.09.084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 09/12/2013] [Accepted: 09/25/2013] [Indexed: 06/02/2023]
Abstract
DNA hairpin structure probes are usually designed by forming intra-molecular duplex based on Watson-Crick hydrogen bonds. In this paper, a molecular beacon based on silver ions-mediated cytosine-Ag(+)-cytosine base pairs was used to detect DNA. The inherent characteristic of the metal ligation facilitated the design of functional probe and the adjustment of its binding strength compared to traditional DNA hairpin structure probes, which make it be used to detect DNA in a simple, rapid and easy way with the help of DNA strands displacement reaction. The method was sensitive and also possesses the good specificity to differentiate the single base mismatched DNA from the complementary DNA. It was also successfully applied to study the damage effect of classic genotoxicity chemicals such as styrene oxide and sodium arsenite on DNA, which was significant in food science, environmental science and pharmaceutical science.
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Affiliation(s)
- Yanxiang Xiong
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, Jiangsu Province, PR China
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175
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Montalti M, Prodi L, Rampazzo E, Zaccheroni N. Dye-doped silica nanoparticles as luminescent organized systems for nanomedicine. Chem Soc Rev 2014; 43:4243-68. [DOI: 10.1039/c3cs60433k] [Citation(s) in RCA: 222] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This review summarizes developments and applications of luminescent dye doped silica nanoparticles as versatile organized systems for nanomedicine.
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Affiliation(s)
- M. Montalti
- Department of Chemistry “G. Ciamician”
- University of Bologna
- 40126 Bologna, Italy
| | - L. Prodi
- Department of Chemistry “G. Ciamician”
- University of Bologna
- 40126 Bologna, Italy
| | - E. Rampazzo
- Department of Chemistry “G. Ciamician”
- University of Bologna
- 40126 Bologna, Italy
| | - N. Zaccheroni
- Department of Chemistry “G. Ciamician”
- University of Bologna
- 40126 Bologna, Italy
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176
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Li Z, Sun Q, Zhu Y, Tan B, Xu ZP, Dou SX. Ultra-small fluorescent inorganic nanoparticles for bioimaging. J Mater Chem B 2014; 2:2793-2818. [DOI: 10.1039/c3tb21760d] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The recent advances of ultra-small fluorescence inorganic nanoparticles including quantum dots, metal nanoclusters, carbon and graphene dots, up-conversion nanocrystals, and silicon nanoparticles have been comprehensively reviewed.
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Affiliation(s)
- Zhen Li
- Institute of Superconducting and Electronic Materials
- The University of Wollongong
- NSW 2500, Australia
| | - Qiao Sun
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Queensland 4072, Australia
| | - Yian Zhu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Queensland 4072, Australia
| | - Bien Tan
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan, China
| | - Zhi Ping Xu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Queensland 4072, Australia
| | - Shi Xue Dou
- Institute of Superconducting and Electronic Materials
- The University of Wollongong
- NSW 2500, Australia
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177
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Zeng H, Li X, Xie F, Teng L, Chen H. Dextran-coated fluorapatite nanorods doped with lanthanides in labelling and directing osteogenic differentiation of bone marrow mesenchymal stem cells. J Mater Chem B 2014; 2:3609-3617. [PMID: 32263797 DOI: 10.1039/c4tb00303a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel approach for labelling and tracking BMSCs in bone tissue engineering by using dextran-coated fluorapatite nanorods doped with lanthanides.
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Affiliation(s)
- Haifeng Zeng
- Cranio-Maxillo-Facial Surgery Department 2
- Plastic Surgery Hospital of Peking Union Medical College & Chinese Academy of Medical Sciences
- Beijing 100144, P.R. China
| | - Xiyu Li
- Department of Biomedical Engineering
- College of Engineering
- Peking University
- Beijing 100871, P.R. China
| | - Fang Xie
- Cranio-Maxillo-Facial Surgery Department 2
- Plastic Surgery Hospital of Peking Union Medical College & Chinese Academy of Medical Sciences
- Beijing 100144, P.R. China
| | - Li Teng
- Cranio-Maxillo-Facial Surgery Department 2
- Plastic Surgery Hospital of Peking Union Medical College & Chinese Academy of Medical Sciences
- Beijing 100144, P.R. China
| | - Haifeng Chen
- Department of Biomedical Engineering
- College of Engineering
- Peking University
- Beijing 100871, P.R. China
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178
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Zhang B, Hu R, Wang Y, Yang C, Liu X, Yong KT. Revisiting the principles of preparing aqueous quantum dots for biological applications: the effects of surface ligands on the physicochemical properties of quantum dots. RSC Adv 2014. [DOI: 10.1039/c4ra00288a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Aqueous CdSe/CdS/ZnS quantum dots with different surface ligands were prepared through ligand exchange and extensively characterized for biological applications.
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Affiliation(s)
- Butian Zhang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Rui Hu
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Yucheng Wang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Chengbin Yang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Xin Liu
- Department of Chemical and Biological Engineering
- University at Buffalo (SUNY)
- Buffalo, USA
| | - Ken-Tye Yong
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
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179
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Liras M, Quijada-Garrido I, Palacios-Cuesta M, Muñoz-Durieux S, García O. Acetyl protected thiol methacrylic polymers as effective ligands to keep quantum dots in luminescent standby mode. Polym Chem 2014. [DOI: 10.1039/c3py00987d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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180
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Huang J, Liu Y, Qian CG, Sun MJ, Shen QD. Multicolour fluorescence cell imaging based on conjugated polymers. RSC Adv 2014. [DOI: 10.1039/c3ra46481d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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181
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Voss B, Haase M. Intrinsic focusing of the particle size distribution in colloids containing nanocrystals of two different crystal phases. ACS NANO 2013; 7:11242-11254. [PMID: 24206197 DOI: 10.1021/nn405026w] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have studied the Ostwald ripening of colloids containing nanocrystals of two different crystal phases of the same material. Ostwald ripening in such polymorphic systems is shown to result in an intrinsic focusing of the particle size distribution of the thermodynamically preferred phase while the particles of the less stable phase completely dissolve. Experimentally, a colloidal system of this kind was realized by mixing small NaEuF4 nanocrystals of the cubic α-phase with particles of the hexagonal β-phase having the same mean size and size distribution. The temporal evolution of the particle sizes of both phases can be understood and numerically simulated within the framework of LSW theory. The simulations show that small differences in the bulk solubility or the surface energy of the two phases are sufficient to explain the experimentally observed narrowing of the particle size distribution.
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Affiliation(s)
- Benjamin Voss
- Department of Inorganic Chemistry I-Materials Research, Institute of Chemistry, University of Osnabrueck , Barbarastrasse 7, 49076 Osnabrueck, Germany
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182
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Anderson NC, Hendricks MP, Choi JJ, Owen JS. Ligand exchange and the stoichiometry of metal chalcogenide nanocrystals: spectroscopic observation of facile metal-carboxylate displacement and binding. J Am Chem Soc 2013; 135:18536-48. [PMID: 24199846 PMCID: PMC4102385 DOI: 10.1021/ja4086758] [Citation(s) in RCA: 430] [Impact Index Per Article: 39.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
We demonstrate that metal carboxylate complexes (L-M(O2CR)2, R = oleyl, tetradecyl, M = Cd, Pb) are readily displaced from carboxylate-terminated ME nanocrystals (ME = CdSe, CdS, PbSe, PbS) by various Lewis bases (L = tri-n-butylamine, tetrahydrofuran, tetradecanol, N,N-dimethyl-n-butylamine, tri-n-butylphosphine, N,N,N',N'-tetramethylbutylene-1,4-diamine, pyridine, N,N,N',N'-tetramethylethylene-1,2-diamine, n-octylamine). The relative displacement potency is measured by (1)H NMR spectroscopy and depends most strongly on geometric factors such as sterics and chelation, although also on the hard/soft match with the cadmium ion. The results suggest that ligands displace L-M(O2CR)2 by cooperatively complexing the displaced metal ion as well as the nanocrystal. Removal of up to 90% of surface-bound Cd(O2CR)2 from CdSe and CdS nanocrystals decreases the Cd/Se ratio from 1.1 ± 0.06 to 1.0 ± 0.05, broadens the 1S(e)-2S(3/2h) absorption, and decreases the photoluminescence quantum yield (PLQY) from 10% to <1% (CdSe) and from 20% to <1% (CdS). These changes are partially reversed upon rebinding of M(O2CR)2 at room temperature (∼60%) and fully reversed at elevated temperature. A model is proposed in which electron-accepting M(O2CR)2 complexes (Z-type ligands) reversibly bind to nanocrystals, leading to a range of stoichiometries for a given core size. The results demonstrate that nanocrystals lack a single chemical formula, but are instead dynamic structures with concentration-dependent compositions. The importance of these findings to the synthesis and purification of nanocrystals as well as ligand exchange reactions is discussed.
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Affiliation(s)
- Nicholas C. Anderson
- Department of Chemistry, Columbia University, 3000 Broadway, MC 3121, New York, NY 10027
| | - Mark P. Hendricks
- Department of Chemistry, Columbia University, 3000 Broadway, MC 3121, New York, NY 10027
| | - Joshua J. Choi
- Department of Chemistry, Columbia University, 3000 Broadway, MC 3121, New York, NY 10027
| | - Jonathan S. Owen
- Department of Chemistry, Columbia University, 3000 Broadway, MC 3121, New York, NY 10027
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183
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Ma Q, Li Y, Lin ZH, Tang G, Su XG. A novel ascorbic acid sensor based on the Fe3+/Fe2+ modulated photoluminescence of CdTe quantum dots@SiO2 nanobeads. NANOSCALE 2013; 5:9726-9731. [PMID: 24056856 DOI: 10.1039/c3nr03060a] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, CdTe quantum dot (QD)@silica nanobeads were used as modulated photoluminescence (PL) sensors for the sensing of ascorbic acid in aqueous solution for the first time. The sensor was developed based on the different quenching effects of Fe(2+) and Fe(3+) on the PL intensity of the CdTe QD@ silica nanobeads. Firstly, the PL intensity of the CdTe QDs was quenched in the presence of Fe(3+). Although both Fe(2+) and Fe(3+) could quench the PL intensity of the CdTe QDs, the quenching efficiency were quite different for Fe(2+) and Fe(3+). The PL intensity of the CdTe QD@silica nanobeads can be quenched by about 15% after the addition of Fe(3+) (60 μmol L(-1)), while the PL intensity of the CdTe QD@silica nanobeads can be quenched about 49% after the addition of Fe(2+) (60 μmol L(-1)). Therefore, the PL intensity of the CdTe QD@silica nanobeads decreased significantly when Fe(3+) was reduced to Fe(2+) by ascorbic acid. To confirm the strategy of PL modulation in this sensing system, trace H2O2 was introduced to oxidize Fe(2+) to Fe(3+). As a result, the PL intensity of the CdTe QD@silica nanobeads was partly recovered. The proposed sensor could be used for ascorbic acid sensing in the concentration range of 3.33-400 μmol L(-1), with a detection limit (3σ) of 1.25 μmol L(-1) The feasibility of the proposed sensor for ascorbic acid determination in tablet samples was also studied, and satisfactory results were obtained.
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Affiliation(s)
- Qiang Ma
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China.
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184
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Depan D, Misra RDK. Structural and physicochemical aspects of silica encapsulated ZnO quantum dots with high quantum yield and their natural uptake in HeLa cells. J Biomed Mater Res A 2013; 102:2934-41. [PMID: 24115677 DOI: 10.1002/jbm.a.34963] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 08/22/2013] [Accepted: 09/11/2013] [Indexed: 11/06/2022]
Abstract
Photoluminescent semiconductor quantum dots (QDs) are of significant interest for bioimaging and fluorescence labeling. In this regard, we describe here the design of high sensitivity and high specificity non-toxic ZnO QDs (∼5 nm) with long-term stability of up to 12 months. The embedding of ZnO QDs on silica nanospheres led to significant increase in photoluminescence intensity rendering them highly bright QD-based probes. The QDs were characterized in vitro with respect to cancer cells (HeLa) and evaluated in terms of viability, fluorescence and cytoskeletal organization. The immobilization of ZnO QDs on silica nanospheres promoted the internalization and enhanced fluorescence emission of HeLa cells. The fluorescence emission from QDs was stable for 3 days, indicating excellent stability toward photobleaching. Cytoskeletal reorganization was observed after internalization of QDs such that the ZnO QDS on silica nanospheres resulted in broadening of the actin cytoskeleton. The study underscores that ZnO QDs immobilized on Si nanospheres are promising for tracking cancer cells in cell therapy.
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Affiliation(s)
- D Depan
- Biomaterials and Biomedical Engineering Research Laboratory, Center for Structural and Functional Materials, University of Louisiana at Lafayette, Lafayette, Louisiana, 70504-4130
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185
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Gautam A, van Veggel FCJM. Synthesis of nanoparticles, their biocompatibility, and toxicity behavior for biomedical applications. J Mater Chem B 2013; 1:5186-5200. [DOI: 10.1039/c3tb20738b] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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