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Hastman DA, Hooe S, Chiriboga M, Díaz SA, Susumu K, Stewart MH, Green CM, Hildebrandt N, Medintz IL. Multiplexed DNA and Protease Detection with Orthogonal Energy Transfer on a Single Quantum Dot Scaffolded Biosensor. ACS Sens 2024; 9:157-170. [PMID: 38160434 DOI: 10.1021/acssensors.3c01812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Almost all pathogens, whether viral or bacterial, utilize key proteolytic steps in their pathogenesis. The ability to detect a pathogen's genomic material along with its proteolytic activity represents one approach to identifying the pathogen and providing initial evidence of its viability. Here, we report on a prototype biosensor design assembled around a single semiconductor quantum dot (QD) scaffold that is capable of detecting both nucleic acid sequences and proteolytic activity by using orthogonal energy transfer (ET) processes. The sensor consists of a central QD assembled via peptidyl-PNA linkers with multiple DNA sequences that encode complements to genomic sequences originating from the Ebola, Influenza, and COVID-19 viruses, which we use as surrogate targets. These are hybridized to complement strands labeled with a terbium (Tb) chelate, AlexaFluor647 (AF647), and Cy5.5 dyes, giving rise to two potential FRET cascades: the first includes Tb → QD → AF647 → Cy5.5 (→ = ET step), which is detected in a time-gated modality, and QD → AF647 → Cy5.5, which is detected from direct excitation. The labeled DNA-displaying QD construct is then further assembled with a RuII-modified peptide, which quenches QD photoluminescence by charge transfer and is recognized by a protease to yield the full biosensor. Each of the labeled DNAs and peptides can be ratiometrically assembled to the QD in a controllable manner to tune each of the ET pathways. Addition of a given target DNA displaces its labeled complement on the QD, disrupting that FRET channel, while protease addition disrupts charge transfer quenching of the central QD scaffold and boosts its photoluminescence and FRET relay capabilities. Along with characterizing the ET pathways and verifying biosensing in both individual and multiplexed formats, we also demonstrate the ability of this construct to function in molecular logic and perform Boolean operations; this highlights the construct's ability to discriminate and transduce signals between different inputs or pathogens. The potential application space for such a sensor device is discussed.
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Affiliation(s)
- David A Hastman
- Center for Bio/Molecular Science and Engineering, U.S. Naval Research Laboratory, Washington ,District of Columbia20375, United States
- American Society for Engineering Education, Washington ,District of Columbia20036, United States
| | - Shelby Hooe
- Center for Bio/Molecular Science and Engineering, U.S. Naval Research Laboratory, Washington ,District of Columbia20375, United States
| | - Matthew Chiriboga
- Northrop Grumman Corporation, Mission Systems, Baltimore, Maryland, 21240, United States
| | - Sebastián A Díaz
- Center for Bio/Molecular Science and Engineering, U.S. Naval Research Laboratory, Washington ,District of Columbia20375, United States
| | - Kimihiro Susumu
- Optical Sciences Division, Code 5600, U.S. Naval Research Laboratory, Washington ,District of Columbia20375, United States
| | - Michael H Stewart
- Optical Sciences Division, Code 5600, U.S. Naval Research Laboratory, Washington ,District of Columbia20375, United States
| | - Christopher M Green
- Center for Bio/Molecular Science and Engineering, U.S. Naval Research Laboratory, Washington ,District of Columbia20375, United States
| | - Niko Hildebrandt
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea
- Department of Engineering Physics, McMaster University, Hamilton L8S 4L7, Canada
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering, U.S. Naval Research Laboratory, Washington ,District of Columbia20375, United States
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Liu WJ, Wang LJ, Zhang CY. Progress in quantum dot-based biosensors for microRNA assay: A review. Anal Chim Acta 2023; 1278:341615. [PMID: 37709484 DOI: 10.1016/j.aca.2023.341615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/15/2023] [Accepted: 07/11/2023] [Indexed: 09/16/2023]
Abstract
MicroRNAs (miRNAs) are responsible for post-transcriptional gene regulation, and may function as valuable biomarkers for diseases diagnosis. Accurate and sensitive analysis of miRNAs is in great demand. Quantum dots (QDs) are semiconductor nanomaterials with superior optoelectronic features, such as high quantum yield and brightness, broad absorption and narrow emission, long fluorescence lifetime, and good photostability. Herein, we give a comprehensive review about QD-based biosensors for miRNA assay. Different QD-based biosensors for miRNA assay are classified by the signal types including fluorescent, electrochemical, electrochemiluminescent, and photoelectrochemical outputs. We highlight the features, principles, and performances of the emerging miRNA biosensors, and emphasize the challenges and perspectives in this field.
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Affiliation(s)
- Wen-Jing Liu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Li-Juan Wang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
| | - Chun-Yang Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
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3
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Mohammadinejad A, Heydari M, Kazemi Oskuee R, Rezayi M. A Critical Systematic Review of Developing Aptasensors for Diagnosis and Detection of Diabetes Biomarkers. Crit Rev Anal Chem 2022; 52:1795-1817. [DOI: 10.1080/10408347.2021.1919986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Arash Mohammadinejad
- Targeted Drug Delivery Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Medical Biotechnology and Nanotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Heydari
- Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Reza Kazemi Oskuee
- Targeted Drug Delivery Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Medical Biotechnology and Nanotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Majid Rezayi
- Department of Medical Biotechnology and Nanotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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4
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Utilizing Fe (III)-doped carbon quantum dots as a nanoprobe for deferiprone determination in exhaled breath condensate. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02563-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Algar WR, Massey M, Rees K, Higgins R, Krause KD, Darwish GH, Peveler WJ, Xiao Z, Tsai HY, Gupta R, Lix K, Tran MV, Kim H. Photoluminescent Nanoparticles for Chemical and Biological Analysis and Imaging. Chem Rev 2021; 121:9243-9358. [PMID: 34282906 DOI: 10.1021/acs.chemrev.0c01176] [Citation(s) in RCA: 117] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Research related to the development and application of luminescent nanoparticles (LNPs) for chemical and biological analysis and imaging is flourishing. Novel materials and new applications continue to be reported after two decades of research. This review provides a comprehensive and heuristic overview of this field. It is targeted to both newcomers and experts who are interested in a critical assessment of LNP materials, their properties, strengths and weaknesses, and prospective applications. Numerous LNP materials are cataloged by fundamental descriptions of their chemical identities and physical morphology, quantitative photoluminescence (PL) properties, PL mechanisms, and surface chemistry. These materials include various semiconductor quantum dots, carbon nanotubes, graphene derivatives, carbon dots, nanodiamonds, luminescent metal nanoclusters, lanthanide-doped upconversion nanoparticles and downshifting nanoparticles, triplet-triplet annihilation nanoparticles, persistent-luminescence nanoparticles, conjugated polymer nanoparticles and semiconducting polymer dots, multi-nanoparticle assemblies, and doped and labeled nanoparticles, including but not limited to those based on polymers and silica. As an exercise in the critical assessment of LNP properties, these materials are ranked by several application-related functional criteria. Additional sections highlight recent examples of advances in chemical and biological analysis, point-of-care diagnostics, and cellular, tissue, and in vivo imaging and theranostics. These examples are drawn from the recent literature and organized by both LNP material and the particular properties that are leveraged to an advantage. Finally, a perspective on what comes next for the field is offered.
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Affiliation(s)
- W Russ Algar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Melissa Massey
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kelly Rees
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rehan Higgins
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Katherine D Krause
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Ghinwa H Darwish
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - William J Peveler
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Zhujun Xiao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Hsin-Yun Tsai
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rupsa Gupta
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kelsi Lix
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Michael V Tran
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Hyungki Kim
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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Elbert KC, Taheri MM, Gogotsi N, Park J, Baxter JB, Murray CB. Electron accepting naphthalene bisimide ligand architectures for modulation of π-π stacking in nanocrystal hybrid materials. NANOSCALE HORIZONS 2020; 5:1509-1514. [PMID: 33103695 DOI: 10.1039/d0nh00359j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Investigation of charge transfer in quantum dot (QD) systems is an area of great interest. Specifically, the relationship between capping ligand and rate of charge transfer has been studied as a means to optimize these materials. To investigate the role of ligand interaction on the QD surface for electron transfer, we designed and synthesized a series of ligands containing an electron accepting moiety, naphthalene bisimide (NBI). These ligands differ in their steric bulk: as one allows for π-π stacking between the NBI moieties at high surface coverages, while the other does not, allowing for a direct comparison of these effects. Once grafted onto QDs, these hybrid materials were studied using UV-Vis, fluorescence, and transient absorption spectroscopy. Interestingly, the sample with the fastest electron transfer was not the sample with the most NBI π-π stacking, it was instead where these ligands were mixed amongst oleic acid, breaking up H-aggregates between the NBI groups.
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Affiliation(s)
- Katherine C Elbert
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
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7
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Development of biosensors for detection of alpha-fetoprotein: As a major biomarker for hepatocellular carcinoma. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115961] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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8
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Luminescent switch of polysaccharide-peptide-quantum dot nanostructures for targeted-intracellular imaging of glioblastoma cells. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112759] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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Brandao MP, Neto MG, Dos Anjos VDC, Bell MJV. Evaluation of the effects of mild heat in bovine milk by time resolved fluorescence. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 219:457-462. [PMID: 31063961 DOI: 10.1016/j.saa.2019.04.079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 04/27/2019] [Accepted: 04/28/2019] [Indexed: 06/09/2023]
Abstract
Heat treatment of milk and dairy products are indispensable for the dairy industry. This thermal processing intends to extend shelf life, improve quality of the milk and minimize the health risks associated with milk and dairy products. The use of time-resolved fluorescence techniques to identify conformation and structure changes ok milk fat and proteins could help understand the temperature effects in bovine milk. This study aimed to use fluorescence lifetimes to evaluate the effects of heating fresh cow milk up to 85 °C. We observed different tendencies for fluorescence lifetimes submitted to different heating temperatures. The longer lifetime values decreased for temperatures higher than room temperature until it reached a minimum value near 40 °C and it slowly increased again for temperatures higher than 40 °C, indicating two distinct processes. These results indicate that time-resolved fluorescence can assist on the analysis of heating effects in fluid milk.
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Affiliation(s)
- Mariana P Brandao
- Departamento de Física, Centro de Ciências Exatas e Tecnológicas, Universidade Federal de Viçosa, Av. P.H. Rolfs, s/n Campus Universitário, 360570-900 Viçosa, MG, Brazil.
| | - Marina Gouvea Neto
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n São Pedro, 36036-900, Juiz de Fora, MG, Brazil
| | - Virgílio de Carvalho Dos Anjos
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n São Pedro, 36036-900, Juiz de Fora, MG, Brazil
| | - Maria José V Bell
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n São Pedro, 36036-900, Juiz de Fora, MG, Brazil
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10
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Exhibition of Förster resonance energy transfer from CdSe/ZnS quantum dots to zinc porphyrazine studied in solution. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.141] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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11
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Walper SA, Lasarte Aragonés G, Sapsford KE, Brown CW, Rowland CE, Breger JC, Medintz IL. Detecting Biothreat Agents: From Current Diagnostics to Developing Sensor Technologies. ACS Sens 2018; 3:1894-2024. [PMID: 30080029 DOI: 10.1021/acssensors.8b00420] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Although a fundamental understanding of the pathogenicity of most biothreat agents has been elucidated and available treatments have increased substantially over the past decades, they still represent a significant public health threat in this age of (bio)terrorism, indiscriminate warfare, pollution, climate change, unchecked population growth, and globalization. The key step to almost all prevention, protection, prophylaxis, post-exposure treatment, and mitigation of any bioagent is early detection. Here, we review available methods for detecting bioagents including pathogenic bacteria and viruses along with their toxins. An introduction placing this subject in the historical context of previous naturally occurring outbreaks and efforts to weaponize selected agents is first provided along with definitions and relevant considerations. An overview of the detection technologies that find use in this endeavor along with how they provide data or transduce signal within a sensing configuration follows. Current "gold" standards for biothreat detection/diagnostics along with a listing of relevant FDA approved in vitro diagnostic devices is then discussed to provide an overview of the current state of the art. Given the 2014 outbreak of Ebola virus in Western Africa and the recent 2016 spread of Zika virus in the Americas, discussion of what constitutes a public health emergency and how new in vitro diagnostic devices are authorized for emergency use in the U.S. are also included. The majority of the Review is then subdivided around the sensing of bacterial, viral, and toxin biothreats with each including an overview of the major agents in that class, a detailed cross-section of different sensing methods in development based on assay format or analytical technique, and some discussion of related microfluidic lab-on-a-chip/point-of-care devices. Finally, an outlook is given on how this field will develop from the perspective of the biosensing technology itself and the new emerging threats they may face.
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Affiliation(s)
- Scott A. Walper
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Guillermo Lasarte Aragonés
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- College of Science, George Mason University Fairfax, Virginia 22030, United States
| | - Kim E. Sapsford
- OMPT/CDRH/OIR/DMD Bacterial Respiratory and Medical Countermeasures Branch, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Carl W. Brown
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- College of Science, George Mason University Fairfax, Virginia 22030, United States
| | - Clare E. Rowland
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- National Research Council, Washington, D.C. 20036, United States
| | - Joyce C. Breger
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Igor L. Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
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12
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Model-Free Estimation of Energy-Transfer Timescales in a Closely Emitting CdSe/ZnS Quantum Dot and Rhodamine 6G FRET Couple. Chem Asian J 2018; 13:3296-3303. [DOI: 10.1002/asia.201801272] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Indexed: 12/28/2022]
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13
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Peveler WJ, Algar WR. More Than a Light Switch: Engineering Unconventional Fluorescent Configurations for Biological Sensing. ACS Chem Biol 2018; 13:1752-1766. [PMID: 29461796 DOI: 10.1021/acschembio.7b01022] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fluorescence is a powerful and sensitive tool in biological detection, used widely for cellular imaging and in vitro molecular diagnostics. Over time, three prominent conventions have emerged in the design of fluorescent biosensors: a sensor is ideally specific for its target, only one fluorescence signal turns on or off in response to the target, and each target requires its own sensor and signal combination. These are conventions but not requirements, and sensors that break with one or more of these conventions can offer new capabilities and advantages. Here, we review "unconventional" fluorescent sensor configurations based on fluorescent dyes, proteins, and nanomaterials such as quantum dots and metal nanoclusters. These configurations include multifluorophore Förster resonance energy transfer (FRET) networks, temporal multiplexing, photonic logic, and cross-reactive arrays or "noses". The more complex but carefully engineered biorecognition and fluorescence signaling modalities in unconventional designs are richer in information, afford greater multiplexing capacity, and are potentially better suited to the analysis of complex biological samples, interactions, processes, and diseases. We conclude with a short perspective on the future of unconventional fluorescent sensors and encourage researchers to imagine sensing beyond the metaphorical light bulb and light switch combination.
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Affiliation(s)
- William J. Peveler
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
- Division of Biomedical Engineering, School of Engineering, University of Glasgow, Glasgow G12 8LT, U.K
| | - W. Russ Algar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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15
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Jung S, Chen X. Quantum Dot-Dye Conjugates for Biosensing, Imaging, and Therapy. Adv Healthc Mater 2018; 7:e1800252. [PMID: 29862653 PMCID: PMC6149543 DOI: 10.1002/adhm.201800252] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 04/17/2018] [Indexed: 01/14/2023]
Abstract
Adding value to the intrinsic properties of quantum dots (QDs), a strategy to conjugate dyes on the surface of QDs offers new opportunities, since the coupling between QD and dyes can be designed to allow Förster resonance energy transfer (FRET) and/or electron transfer (eT). These processes are accompanied by the change of QD and/or dye fluorescence and subsequent photochemical reactions (e.g., generation of 1 O2 ). Based on the change of fluorescence signals by the interaction with biomolecules, QD-dye conjugates are exploited as biosensors for the detection of pH, O2 , nicotinamide adenine dinucleotide (phosphate), ions, proteases, glutathione, and microRNA. QD-dye conjugates also can be modulated by the irradiation of external light; this concept is demonstrated for fluorescence super-resolution imaging as photoactivatable or photoswitchable probes. When QDs are conjugated with photosensitizing dyes, the QD-dye conjugates can generate 1 O2 in a repetitive manner for better cancer treatment, and can also be available for approaches using two-photon excitation or bioluminescence resonance energy transfer mechanisms for deep tissue imaging. Here, the recent advances in QD-dye conjugates, where FRET or eT produces fluorescence readouts or photochemical reactions, are reviewed. Various QD-dye conjugate systems and their biosensing/imaging and photodynamic therapeutics are summarized.
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Affiliation(s)
- Sungwook Jung
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
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Wang M, Fei X, Lv S, Sheng Y, Zou H, Song Y, Yan F, Zhu Q, Zheng K. Synthesis and characterization of a flexible fluorescent magnetic Fe 3O 4@SiO 2/CdTe-NH 2 nanoprobe. J Inorg Biochem 2018; 186:307-316. [PMID: 30015258 DOI: 10.1016/j.jinorgbio.2018.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 06/05/2018] [Accepted: 06/07/2018] [Indexed: 01/13/2023]
Abstract
In this study, we designed and synthesized two novel fluorescent magnetic nanoparticles. Fe3O4@SiO2-NH-GSH-CdTe (FSGC) (GSH = glutathione) nanoparticles were synthesized using amino-functionalized Fe3O4@SiO2 nanoparticles and GSH-stabilized CdTe quantum dots (CdTe QDs), while flexible Fe3O4@SiO2-NH-GSH-CdTe-NH-NH2 (FSGCN) nanoparticles were synthesized using the FSGC precursor and 1,6-hexamethylenediamine. These two kinds of nanoprobes exhibited excellent magnetic and fluorescent properties. By comparing the fluorescence quenching effect of folic acid (FA) on FSGC and FSGCN, we found that the quenching effect of FA on FSGC was acute and the process was too fast to determine the FA content. However, the quenching effect of FA on flexible FSGCN was mild and hence it could be used as a nanoprobe to determine FA concentration. At physiological pH, the fluorescence quenching effect of FA on the FSGCN nanoprobes was fitted according to the Stern-Volmer equation with a linear response in the concentration range of 0.14 to 4.20 μg mL-1 with a detection limit of 15.1 × 10-9 g mL-1 (S/N = 3) under optimized experimental conditions. The proposed flexible nanoprobe was successfully used to determine the content of FA in folic acid tablets. Recovery was found to be in the range of 92.7%-105.6% with a relative standard deviation of 1.12%-3.84%. Owing to their good stability, environment-friendly characteristics, high selectivity, and good optical properties and biocompatibility, these nanoprobes have potential for usage in practical applications.
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Affiliation(s)
- Min Wang
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China; Development and Molecular Pharmacology Laboratory of Active Polysaccharides, School of Life Science, Jilin University, Changchun 130012, People's Republic of China
| | - Xiaofang Fei
- Development and Molecular Pharmacology Laboratory of Active Polysaccharides, School of Life Science, Jilin University, Changchun 130012, People's Republic of China; Key Laboratory for Molecular Enzymology and Engineering, Ministry of Education, School of Life Science, Jilin University, Changchun 130012, People's Republic of China; National Engineering Laboratory for AIDS Vaccine, School of Life Science, Jilin University, Changchun 130012, People's Republic of China.
| | - Shaowu Lv
- Key Laboratory for Molecular Enzymology and Engineering, Ministry of Education, School of Life Science, Jilin University, Changchun 130012, People's Republic of China
| | - Ye Sheng
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Haifeng Zou
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Yanhua Song
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Fei Yan
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Qianlong Zhu
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Keyan Zheng
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
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Hu H, He H, Zhang J, Hou X, Wu P. Optical sensing at the nanobiointerface of metal ion-optically-active nanocrystals. NANOSCALE 2018; 10:5035-5046. [PMID: 29504617 DOI: 10.1039/c8nr00350e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Optically-active nanocrystals (such as quantum dots and plasmonic noble metal nanoparticles) have received great attention due to their size-tunable optical properties. The indicator displacement assay (IDA) with optically-active nanocrystals has become a common practice for optical sensor development, since no sophisticated surface functionalization of nanoparticles is required. Among the IDA-based optical sensors, the use of metal ions as receptors seems to be attractive. Therefore, in this review, the research progress of optical sensing at the nanobiointerface of metal ion-optically-active nanocrystals has been summarized. In particular, metal ion-mediated selective recognition has been summarized here based on the classical Hard-Soft-Acid-Base (HSAB) principle, which has been seldom mentioned before. Most of the references were therefore categorized according to their located place based on the HSAB theory. Besides, several metal ion modulation strategies that were not related to the HSAB theory (e.g., redox modulation) were also included. Finally, due to the cross-talk of metal ions in selective recognition, we have also summarized sensor array development based on multiple metal ion receptors in IDA sensing with optically-active nanocrystals. Several interesting applications of the IDA sensing with metal ions as receptors and optically-active nanocrystals as indicators are presented, with specific emphasis on the design principles and photophysical mechanisms of these probes.
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Affiliation(s)
- Hao Hu
- Analytical & Testing Center, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China.
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Ma F, Li CC, Zhang CY. Development of quantum dot-based biosensors: principles and applications. J Mater Chem B 2018; 6:6173-6190. [DOI: 10.1039/c8tb01869c] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We review the recent advances in quantum dot-based biosensors and focus on quantum dot-based fluorescent, bioluminescent, chemiluminescent, and photoelectrochemical biosensors.
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Affiliation(s)
- Fei Ma
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Chen-chen Li
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Chun-yang Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
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19
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Peveler WJ, Jaber SB, Parkin IP. Nanoparticles in explosives detection - the state-of-the-art and future directions. Forensic Sci Med Pathol 2017; 13:490-494. [PMID: 28801875 PMCID: PMC5688190 DOI: 10.1007/s12024-017-9903-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2017] [Indexed: 12/29/2022]
Affiliation(s)
- William J Peveler
- Department of Chemistry, University College London, 20 Gordon St, WC1H 0AJ, London, UK
| | - Sultan Ben Jaber
- Department of Chemistry, University College London, 20 Gordon St, WC1H 0AJ, London, UK
| | - Ivan P Parkin
- Department of Chemistry, University College London, 20 Gordon St, WC1H 0AJ, London, UK.
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20
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Ma L, Sun S, Wang Y, Jiang K, Zhu J, Li J, Lin H. A graphene quantum dot-based fluorescent nanoprobe for hypochlorite detection in water and in living cells. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2412-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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21
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A Low-Symmetry Cubic Mesophase of Dendronized CdS Nanoparticles and Their Structure-Dependent Photoluminescence. Chem 2017. [DOI: 10.1016/j.chempr.2017.05.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Jeong S, Song J, Lee W, Ryu YM, Jung Y, Kim SY, Kim K, Hong SC, Myung SJ, Kim S. Cancer-Microenvironment-Sensitive Activatable Quantum Dot Probe in the Second Near-Infrared Window. NANO LETTERS 2017; 17:1378-1386. [PMID: 28125238 DOI: 10.1021/acs.nanolett.6b04261] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Recent technological advances have expanded fluorescence (FL) imaging into the second near-infrared region (NIR-II; wavelength = 1000-1700 nm), providing high spatial resolution through deep tissues. However, bright and compact fluorophores are rare in this region, and sophisticated control over NIR-II probes has not been fully achieved yet. Herein, we report an enzyme-activatable NIR-II probe that exhibits FL upon matrix metalloprotease activity in tumor microenvironment. Bright and stable PbS/CdS/ZnS core/shell/shell quantum dots (QDs) were synthesized as a model NIR-II fluorophore, and activatable modulators were attached to exploit photoexcited electron transfer (PET) quenching. The quasi type-II QD band alignment allowed rapid and effective FL modulations with the compact surface ligand modulator that contains methylene blue PET quencher. The modulator was optimized to afford full enzyme accessibility and high activation signal surge upon the enzyme activity. Using a colon cancer mouse model, the probe demonstrated selective FL activation at tumor sites with 3-fold signal enhancement in 10 min. Optical phantom experiments confirmed the advantages of the NIR-II probe over conventional dyes in the first near-infrared region.
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Affiliation(s)
| | | | | | - Yeon Mi Ryu
- Asan Institute for Life Sciences, Asan Medical Center , 88 Olympic-ro, 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | | | - Sang-Yeob Kim
- Asan Institute for Life Sciences, Asan Medical Center , 88 Olympic-ro, 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
- Department of Convergence Medicine, University of Ulsan College of Medicine , 88 Olympic-ro, 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Kangwook Kim
- Department of Civil and Environmental Engineering, Korea Army Academy at Young-cheon , Yeongcheon-si, Gyeongsangbuk-do South Korea
| | | | - Seung Jae Myung
- Asan Institute for Life Sciences, Asan Medical Center , 88 Olympic-ro, 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
- Department of Convergence Medicine, University of Ulsan College of Medicine , 88 Olympic-ro, 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine , 88 Olympic-ro, 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
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23
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Girma WM, Fahmi MZ, Permadi A, Abate MA, Chang JY. Synthetic strategies and biomedical applications of I–III–VI ternary quantum dots. J Mater Chem B 2017; 5:6193-6216. [DOI: 10.1039/c7tb01156c] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In this review, we discuss recent advances of I–III–VI QDs with a major focus on synthesis and biomedical applications; advantages include low toxicity and fluorescent tuning in the biological window.
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Affiliation(s)
- Wubshet Mekonnen Girma
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei
- Republic of China
| | | | - Adi Permadi
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei
- Republic of China
| | - Mulu Alemayehu Abate
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei
- Republic of China
| | - Jia-Yaw Chang
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei
- Republic of China
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24
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Algar WR, Khachatrian A, Melinger JS, Huston AL, Stewart MH, Susumu K, Blanco-Canosa JB, Oh E, Dawson PE, Medintz IL. Concurrent Modulation of Quantum Dot Photoluminescence Using a Combination of Charge Transfer and Förster Resonance Energy Transfer: Competitive Quenching and Multiplexed Biosensing Modality. J Am Chem Soc 2016; 139:363-372. [DOI: 10.1021/jacs.6b11042] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- W. Russ Algar
- Department
of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Ani Khachatrian
- Sotera Defense Solutions, Columbia, Maryland 21046, United States
| | | | | | | | - Kimihiro Susumu
- Sotera Defense Solutions, Columbia, Maryland 21046, United States
| | - Juan B. Blanco-Canosa
- Departments
of Chemistry and Cell Biology, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Eunkeu Oh
- Sotera Defense Solutions, Columbia, Maryland 21046, United States
| | - Philip E. Dawson
- Departments
of Chemistry and Cell Biology, The Scripps Research Institute, La Jolla, California 92037, United States
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25
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Dey N, Bhagat D, Cherukaraveedu D, Bhattacharya S. Utilization of Red-Light-Emitting CdTe Nanoparticles for the Trace-Level Detection of Harmful Herbicides in Adulterated Food and Agricultural Crops. Chem Asian J 2016; 12:76-85. [DOI: 10.1002/asia.201601302] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Nilanjan Dey
- Department of Organic Chemistry; Indian Institute of Science; Bangalore 560012 1 India
| | - Deepa Bhagat
- Indian Council of Agricultural Research; National Bureau of Agriculturally Insect Resources; Bangalore 560 024 India
| | - Durgadas Cherukaraveedu
- Department of Organic Chemistry; Indian Institute of Science; Bangalore 560012 1 India
- School of Chemistry; University of Edinburgh; David Brewster Road, Joseph Black Building EH9 3JF United Kingdom
| | - Santanu Bhattacharya
- Department of Organic Chemistry; Indian Institute of Science; Bangalore 560012 1 India
- Indian Association of Cultivation of Science; Kolkata 700032 India
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26
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Hildebrandt N, Spillmann CM, Algar WR, Pons T, Stewart MH, Oh E, Susumu K, Díaz SA, Delehanty JB, Medintz IL. Energy Transfer with Semiconductor Quantum Dot Bioconjugates: A Versatile Platform for Biosensing, Energy Harvesting, and Other Developing Applications. Chem Rev 2016; 117:536-711. [DOI: 10.1021/acs.chemrev.6b00030] [Citation(s) in RCA: 457] [Impact Index Per Article: 57.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Niko Hildebrandt
- NanoBioPhotonics
Institut d’Electronique Fondamentale (I2BC), Université Paris-Saclay, Université Paris-Sud, CNRS, 91400 Orsay, France
| | | | - W. Russ Algar
- Department
of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Thomas Pons
- LPEM;
ESPCI Paris, PSL Research University; CNRS; Sorbonne Universités, UPMC, F-75005 Paris, France
| | | | - Eunkeu Oh
- Sotera Defense Solutions, Inc., Columbia, Maryland 21046, United States
| | - Kimihiro Susumu
- Sotera Defense Solutions, Inc., Columbia, Maryland 21046, United States
| | - Sebastian A. Díaz
- American Society for Engineering Education, Washington, DC 20036, United States
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27
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Wu P, Hou X, Xu JJ, Chen HY. Ratiometric fluorescence, electrochemiluminescence, and photoelectrochemical chemo/biosensing based on semiconductor quantum dots. NANOSCALE 2016; 8:8427-42. [PMID: 27056088 DOI: 10.1039/c6nr01912a] [Citation(s) in RCA: 196] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Ratiometric fluorescent sensors, which can provide built-in self-calibration for correction of a variety of analyte-independent factors, have attracted particular attention for analytical sensing and optical imaging with the potential to provide a precise and quantitative analysis. A wide variety of ratiometric sensing probes using small fluorescent molecules have been developed. Compared with organic dyes, exploiting semiconductor quantum dots (QDs) in ratiometric fluorescence sensing is even more intriguing, owing to their unique optical and photophysical properties that offer significant advantages over organic dyes. In this review, the main photophysical mechanism for generating dual-emission from QDs for ratiometry is discussed and categorized in detail. Typically, dual-emission can be obtained either with energy transfer from QDs to dyes or with independent dual fluorophores of QDs and dye/QDs. The recent discovery of intrinsic dual-emission from Mn-doped QDs offers new opportunities for ratiometric sensing. Particularly, the signal transduction of QDs is not restricted to fluorescence, and electrochemiluminescence and photoelectrochemistry from QDs are also promising for sensing, which can be made ratiometric for correction of interferences typically encountered in electrochemistry. All these unique photophysical properties of QDs lead to a new avenue of ratiometry, and the recent progress in this area is addressed and summarized here. Several interesting applications of QD-based ratiometry are presented for the determination of metal ions, temperature, and biomolecules, with specific emphasis on the design principles and photophysical mechanisms of these probes.
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Affiliation(s)
- Peng Wu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
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28
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Spillmann CM, Stewart MH, Susumu K, Medintz IL. Combining semiconductor quantum dots and bioscaffolds into nanoscale energy transfer devices. APPLIED OPTICS 2015; 54:F85-F95. [PMID: 26560627 DOI: 10.1364/ao.54.000f85] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Significant advances have been made in the development of nanoscale devices capable of exciton transport via Förster resonance energy transfer. Several requirements must be met for effective operation, including a reliable energy-harvesting source along with highly organized, precisely placed energy relay elements. For the latter, biological scaffolds such as DNA provide a customizable, symmetric, and stable structure that can be site-specifically modified with organic fluorophores. Here, advancements in nanoscale energy transfer devices incorporating semiconductor nanocrystals and bioscaffolds are reviewed with discussion of biofunctionalization, linker chemistries, design considerations, and concluding with applications in light harvesting, multiplexed biosensing, and optical logic.
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29
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Zhou J, Yang Y, Zhang CY. Toward Biocompatible Semiconductor Quantum Dots: From Biosynthesis and Bioconjugation to Biomedical Application. Chem Rev 2015; 115:11669-717. [DOI: 10.1021/acs.chemrev.5b00049] [Citation(s) in RCA: 472] [Impact Index Per Article: 52.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Juan Zhou
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
- Single-Molecule
Detection and Imaging Laboratory, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Yong Yang
- Single-Molecule
Detection and Imaging Laboratory, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Chun-yang Zhang
- College
of Chemistry, Chemical Engineering and Materials Science, Collaborative
Innovation Center of Functionalized Probes for Chemical Imaging in
Universities of Shandong, Key Laboratory of Molecular and Nano Probes,
Ministry of Education, Shandong Provincial Key Laboratory of Clean
Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China
- Single-Molecule
Detection and Imaging Laboratory, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
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30
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Zor E, Morales-Narváez E, Zamora-Gálvez A, Bingol H, Ersoz M, Merkoçi A. Graphene Quantum Dots-based Photoluminescent Sensor: A Multifunctional Composite for Pesticide Detection. ACS APPLIED MATERIALS & INTERFACES 2015; 7:20272-20279. [PMID: 26313947 DOI: 10.1021/acsami.5b05838] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Due to their size and difficulty to obtain, cost/effective biological or synthetic receptors (e.g., antibodies or aptamers, respectively), organic toxic compounds (e.g., less than 1 kDa) are generally challenging to detect using simple platforms such as biosensors. This study reports on the synthesis and characterization of a novel multifunctional composite material, magnetic silica beads/graphene quantum dots/molecularly imprinted polypyrrole (mSGP). mSGP is engineered to specifically and effectively capture and signal small molecules due to the synergy among chemical, magnetic, and optical properties combined with molecular imprinting of tributyltin (291 Da), a hazardous compound, selected as a model analyte. Magnetic and selective properties of the mSGP composite can be exploited to capture and preconcentrate the analyte onto its surface, and its photoluminescent graphene quantum dots, which are quenched upon analyte recognition, are used to interrogate the presence of the contaminant. This multifunctional material enables a rapid, simple and sensitive platform for small molecule detection, even in complex mediums such as seawater, without any sample treatment.
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Affiliation(s)
- Erhan Zor
- ICN2-Catalan Institute of Nanoscience and Nanotechnology, Campus de la UAB , 08193 (Bellaterra) Barcelona, Spain
- Science and Technology Department, A.K. Faculty of Education, Necmettin Erbakan University , Konya, 42090, Turkey
- Department of Chemistry, Institute of Science, Selcuk University , Konya, 42030, Turkey
- Department of Chemistry, A.K. Education Faculty, Necmettin Erbakan University , Konya, 42090, Turkey
| | - Eden Morales-Narváez
- ICN2-Catalan Institute of Nanoscience and Nanotechnology, Campus de la UAB , 08193 (Bellaterra) Barcelona, Spain
| | - Alejandro Zamora-Gálvez
- ICN2-Catalan Institute of Nanoscience and Nanotechnology, Campus de la UAB , 08193 (Bellaterra) Barcelona, Spain
| | - Haluk Bingol
- Department of Chemistry, A.K. Education Faculty, Necmettin Erbakan University , Konya, 42090, Turkey
| | - Mustafa Ersoz
- Advanced Technology Research and Application Center, Selcuk University , Konya, 42030, Turkey
| | - Arben Merkoçi
- ICN2-Catalan Institute of Nanoscience and Nanotechnology, Campus de la UAB , 08193 (Bellaterra) Barcelona, Spain
- ICREA-Catalan Institution for Research and Advanced Studies , Barcelona, 08010, Spain
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