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Chaudhari P, Chau LK, Ngo LT, Chang TC, Chen YL, Huang KT. Competitive Assay for the Ultrasensitive Detection of Organophosphate Pesticides Based on a Fiber-Optic Particle Plasmon Resonance Biosensor and an Acetylcholinesterase Binding Peptide. Anal Chem 2023; 95:14600-14607. [PMID: 37726976 DOI: 10.1021/acs.analchem.3c01960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
An acetylcholinesterase (AChE) binding-based biosensor was developed for the ultrasensitive detection of organophosphate (OP) pesticides. The biosensor integrates the technique based on fiber-optic particle plasmon resonance detection and a synthetic AChE binding peptide conjugated with gold nanoparticles on the optical fiber surface via an AChE competitive binding assay. The OP pesticides present in the solution hinder the binding of AChE to the peptide on the biosensor by competing for the binding sites present in AChE. The limit of detection obtained for parathion using this method was observed to be 0.66 ppt (2.3 pM). This method shows a wide linear dynamic range of 6 orders. Furthermore, the use of the AChE binding peptide in the biosensor can better discriminate OPs against carbamates by using only a single biosensor. The practical application of this method was tested using spiked samples, which yielded good recovery and reproducibility. The spiked sample required minimal pretreatment before analysis; hence, this biosensor may also be used in the field.
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Affiliation(s)
- Pallavi Chaudhari
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chiayi 621301, Taiwan
| | - Lai-Kwan Chau
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chiayi 621301, Taiwan
- Center for Nano Bio-Detection, National Chung Cheng University, Chiayi 621301, Taiwan
| | - Loan Thi Ngo
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chiayi 621301, Taiwan
| | - Ting-Chou Chang
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chiayi 621301, Taiwan
| | - Yi-Ling Chen
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chiayi 621301, Taiwan
| | - Kuang-Tse Huang
- Center for Nano Bio-Detection, National Chung Cheng University, Chiayi 621301, Taiwan
- Department of Chemical Engineering, National Chung Cheng University, Chiayi 621301, Taiwan
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2
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Behl T, Kaur I, Sehgal A, Singh S, Sharma N, Bhatia S, Al-Harrasi A, Bungau S. The dichotomy of nanotechnology as the cutting edge of agriculture: Nano-farming as an asset versus nanotoxicity. CHEMOSPHERE 2022; 288:132533. [PMID: 34655646 DOI: 10.1016/j.chemosphere.2021.132533] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/21/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
The unprecedented setbacks and environmental complications, faced by global agro-farming industry, have led to the advent of nanotechnology in agriculture, which has been recognized as a novel and innovative approach in development of sustainable farming practices. The agricultural regimen is the "head honcho" of the world, however presently certain approaches have been imposing grave danger to the environment and human civilization. The nano-farming paradigm has successfully elevated the growth and development of plants, parallel to the production, quality, germination/transpiration index, photosynthetic machinery, genetic progression, and so on. This has optimized the traditional farming into precision farming, utilising nano-based sensors and nanobionics, smart delivery tools, nanotech facets in plant disease management, nanofertilizers, enhancement of plant adaptive potential to external stress, role in bioenergy conservation and so on. These applications portray nanorevolution as "the big cheese" of global agriculture, mitigating the bottlenecks of conventional practices. Besides the applications of nanotechnology, the review identifies the limitations, like possible harmful impact on environment, mankind and plants, as the "Achilles heel" in agro-industry, aiming to establish its defined role in agriculture, while simultaneously considering the risks, in order to resolve them, thus abiding by "technology-yes, but safety-must". The authors aim to provide a significant opportunity to the nanotech researchers, Botanists and environmentalists, to promote judicial use of nanoparticles and establish a secure and safe environment.
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Affiliation(s)
- Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Punjab, India.
| | - Ishnoor Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Aayush Sehgal
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Sukhbir Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Neelam Sharma
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Saurabh Bhatia
- Natural & Medical Sciences Research Centre, University of Nizwa, Nizwa, Oman; School of Health Science, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, India
| | - Ahmed Al-Harrasi
- Natural & Medical Sciences Research Centre, University of Nizwa, Nizwa, Oman
| | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Romania
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Sharma P, Kumar S, Patel A, Datta B, DeLong RK. Nanomaterials for Agricultural and Ecological Defense Applications: Active Agents and Sensors. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2021; 13:e1713. [PMID: 33749154 DOI: 10.1002/wnan.1713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 02/17/2021] [Accepted: 02/20/2021] [Indexed: 11/08/2022]
Abstract
The world we live in today is overpopulated with an unprecedented number of people competing for fewer and fewer precious resources. The struggle to efficiently steward and manage these resources is a global problem in need of concrete and urgent solutions. Nanomaterials have driven innovation in diverse industrial sectors including military, aviation, electronic, and medical among others. Nanoscale materials possess unique surfaces and exquisite opto-electronic properties that make them uniquely suited to environmental, biological, and ecological defense applications. A tremendous upsurge of research activity in these areas is evident from the exponential increase in publications worldwide. Here we review recent applications of nanomaterials toward soil health and management, abiotic and biotic stress management, plant defense, delivery of the RNA Interference (RNAi), plant growth, manufacture of agro-products, and ecological investigations related to farming. For example, nanomaterial constructs have been used to counter environmental stresses and in plant defense and disease diagnosis. Nanosensor chemistries have been developed to monitor water quality and measure specific pollutant levels. Specific nanomaterials such as silver, iron oxide, and zinc oxide proffer protection to plants from pathogens. This review describes progress in nanomaterial-based agricultural and ecological defense and seeks to identify factors that would enable their wider commercialization and deployment. This article is categorized under: Diagnostic Tools > Biosensing Toxicology and Regulatory Issues in Nanomedicine > Toxicology of Nanomaterials Diagnostic Tools > Diagnostic Nanodevices.
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Affiliation(s)
- Pramila Sharma
- Department of Biological Engineering, Indian Institute of Technology, Gandhinagar, Gujarat, India
| | - Sanjay Kumar
- School of Biosciences and Bioengineering, D. Y. Patil International University, Pune, India
| | - Axita Patel
- Department of Biological Engineering, Indian Institute of Technology, Gandhinagar, Gujarat, India
| | - Bhaskar Datta
- Department of Biological Engineering, Indian Institute of Technology, Gandhinagar, Gujarat, India.,Department of Chemistry, Indian Institute of Technology, Gandhinagar, Gujarat, India
| | - Robert K DeLong
- Nanotechnology Innovation Center, Kansas State University, Kansas, USA
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Fluorescent sensor for indirect measurement of methyl parathion based on alkaline-induced hydrolysis using N-doped carbon dots. Talanta 2019; 192:368-373. [DOI: 10.1016/j.talanta.2018.08.083] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 08/09/2018] [Accepted: 08/29/2018] [Indexed: 12/17/2022]
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5
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Lv M, Liu Y, Geng J, Kou X, Xin Z, Yang D. Engineering nanomaterials-based biosensors for food safety detection. Biosens Bioelectron 2018; 106:122-128. [DOI: 10.1016/j.bios.2018.01.049] [Citation(s) in RCA: 181] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 01/03/2018] [Accepted: 01/23/2018] [Indexed: 01/07/2023]
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Duhan JS, Kumar R, Kumar N, Kaur P, Nehra K, Duhan S. Nanotechnology: The new perspective in precision agriculture. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2017; 15:11-23. [PMID: 28603692 PMCID: PMC5454086 DOI: 10.1016/j.btre.2017.03.002] [Citation(s) in RCA: 278] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 03/15/2017] [Accepted: 03/16/2017] [Indexed: 01/01/2023]
Abstract
Nanotechnology is an interdisciplinary research field. In recent past efforts have been made to improve agricultural yield through exhaustive research in nanotechnology. The green revolution resulted in blind usage of pesticides and chemical fertilizers which caused loss of soil biodiversity and developed resistance against pathogens and pests as well. Nanoparticle-mediated material delivery to plants and advanced biosensors for precision farming are possible only by nanoparticles or nanochips. Nanoencapsulated conventional fertilizers, pesticides and herbicides helps in slow and sustained release of nutrients and agrochemicals resulting in precise dosage to the plants. Nanotechnology based plant viral disease detection kits are also becoming popular and are useful in speedy and early detection of viral diseases. In this article, the potential uses and benefits of nanotechnology in precision agriculture are discussed. The modern nanotechnology based tools and techniques have the potential to address the various problems of conventional agriculture and can revolutionize this sector.
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Affiliation(s)
- Joginder Singh Duhan
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa-125055, Haryana, India
| | - Ravinder Kumar
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa-125055, Haryana, India
| | - Naresh Kumar
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa-125055, Haryana, India
| | - Pawan Kaur
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa-125055, Haryana, India
| | - Kiran Nehra
- Department of Biotechnology, Deenbandhu Chhotu Ram University of Science & Technology, Murthal-131039, Sonipat, Haryana, India
| | - Surekha Duhan
- Department of Botany, Ch. Mani Ram Godara Govt. College for Women, Bhodia Khera, Fatehabad-125050, Haryana, India
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7
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Liu X, Liu Q, Kong F, Qiao X, Xu Z. Molecularly imprinted fluorescent probe based on hydrophobic CdSe/ZnS quantum dots for the detection of methamidophos in fruit and vegetables. ADVANCES IN POLYMER TECHNOLOGY 2017. [DOI: 10.1002/adv.21838] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xueyan Liu
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an China
- Shandong Wuzhou Detection Co., Ltd.; Sishui China
| | - Qiurui Liu
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an China
- Shandong Wuzhou Detection Co., Ltd.; Sishui China
| | - Feifan Kong
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an China
- Shandong Wuzhou Detection Co., Ltd.; Sishui China
| | - Xuguang Qiao
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an China
- Shandong Wuzhou Detection Co., Ltd.; Sishui China
| | - Zhixiang Xu
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an China
- Shandong Wuzhou Detection Co., Ltd.; Sishui China
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8
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Emerging Nanomaterials for Analytical Detection. BIOSENSORS FOR SUSTAINABLE FOOD - NEW OPPORTUNITIES AND TECHNICAL CHALLENGES 2016. [DOI: 10.1016/bs.coac.2016.03.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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He J, Wang Y, Zhang X. Preparation of Artificial Antigen and Development of Indirect Competitive ELISA Based on Chicken IgY for the Detection of Acid Orange II in Food Samples. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0203-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Determination of five quinolone antibiotic residues in foods by micellar electrokinetic capillary chromatography with quantum dot indirect laser-induced fluorescence. Anal Bioanal Chem 2014; 406:3201-8. [DOI: 10.1007/s00216-014-7730-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Revised: 02/23/2014] [Accepted: 02/25/2014] [Indexed: 10/25/2022]
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11
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Wang J, Huang X, Ruan L, Lan T, Ren J. Size exclusion chromatography as a universal method for the purification of quantum dots bioconjugates. Electrophoresis 2013; 34:1764-71. [DOI: 10.1002/elps.201200649] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 02/13/2013] [Accepted: 02/13/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Jinjie Wang
- College of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; P. R. China
| | - Xiangyi Huang
- College of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; P. R. China
| | - Lingao Ruan
- College of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; P. R. China
| | - Tao Lan
- College of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; P. R. China
| | - Jicun Ren
- College of Chemistry & Chemical Engineering, State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; P. R. China
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12
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Chouhan RS, Niazi JH, Qureshi A. E. coli–quantum dot bioconjugates as whole-cell fluorescent reporters for probing cellular damage. J Mater Chem B 2013; 1:2724-2730. [DOI: 10.1039/c3tb20338g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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13
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Vinayaka AC, Thakur MS. Facile synthesis and photophysical characterization of luminescent CdTe quantum dots for Forster resonance energy transfer based immunosensing of staphylococcal enterotoxin B. LUMINESCENCE 2012. [DOI: 10.1002/bio.2440] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Aaydha C. Vinayaka
- Fermentation Technology & Bioengineering Department; Central Food Technological Research Institute; Mysore 570020 India
| | - Munna S. Thakur
- Fermentation Technology & Bioengineering Department; Central Food Technological Research Institute; Mysore 570020 India
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14
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Determination of hyperin in seed of Cuscuta chinensis Lam. by enhanced chemiluminescence of CdTe quantum dots on calcein/K3Fe(CN)6 system. Food Chem 2012; 134:2383-8. [DOI: 10.1016/j.foodchem.2012.04.055] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 03/13/2012] [Accepted: 04/07/2012] [Indexed: 02/03/2023]
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15
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Applications of quantum dots as probes in immunosensing of small-sized analytes. Biosens Bioelectron 2012; 41:12-29. [PMID: 23079338 DOI: 10.1016/j.bios.2012.09.025] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 09/11/2012] [Accepted: 09/17/2012] [Indexed: 01/23/2023]
Abstract
Quantum dots (QDs) are semiconductor nanoparticles with very interesting optical properties, like high quantum yield or narrow and size-tuneable fluorescence spectra. Current applications of QDs are widespread, their use as fluorescence labels in bioassays being one of the most promising. These nanoparticles are usually conjugated to highly specific biomolecules like antibodies, oligonucleotides, enzymes or aptamers to improve assay selectivity. In this review, QD surface passivation, conjugation to biomolecules, and purification strategies are discussed with special emphasis to the development of QD-based immunoassays for the detection of low molecular weight compounds given the relevance of this sort of analytes in health, food safety, pharmaceutical, or environmental monitoring areas. The aim of this review is to summarise the main achievements attained so far and to initialise researchers in the field of antibody-based assays employing QDs as labels, such as fluorescence-linked immunosorbent assay (FLISA), fluorescence (or Förster) resonance energy transfer (FRET), immunochromatographic methods, and immunosensors.
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16
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Ai X, Niu L, Li Y, Yang F, Su X. A novel β-Cyclodextrin-QDs optical biosensor for the determination of amantadine and its application in cell imaging. Talanta 2012; 99:409-14. [DOI: 10.1016/j.talanta.2012.05.072] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 05/31/2012] [Accepted: 05/31/2012] [Indexed: 12/20/2022]
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17
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Wang J, Huang X, Zan F, Guo CG, Cao C, Ren J. Studies on bioconjugation of quantum dots using capillary electrophoresis and fluorescence correlation spectroscopy. Electrophoresis 2012; 33:1987-95. [DOI: 10.1002/elps.201200024] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jinjie Wang
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; Peoples Republic of China
| | - Xiangyi Huang
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; Peoples Republic of China
| | - Feng Zan
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; Peoples Republic of China
| | - Chen-gang Guo
- College of Life Science and Technology; Shanghai Jiaotong University; Shanghai; Peoples Republic of China
| | - Chengxi Cao
- College of Life Science and Technology; Shanghai Jiaotong University; Shanghai; Peoples Republic of China
| | - Jicun Ren
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai; Peoples Republic of China
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18
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Application of quantum dots as analytical tools in automated chemical analysis: a review. Anal Chim Acta 2012; 735:9-22. [PMID: 22713912 DOI: 10.1016/j.aca.2012.04.042] [Citation(s) in RCA: 182] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 04/24/2012] [Accepted: 04/27/2012] [Indexed: 01/09/2023]
Abstract
Colloidal semiconductor nanocrystals or quantum dots (QDs) are one of the most relevant developments in the fast-growing world of nanotechnology. Initially proposed as luminescent biological labels, they are finding new important fields of application in analytical chemistry, where their photoluminescent properties have been exploited in environmental monitoring, pharmaceutical and clinical analysis and food quality control. Despite the enormous variety of applications that have been developed, the automation of QDs-based analytical methodologies by resorting to automation tools such as continuous flow analysis and related techniques, which would allow to take advantage of particular features of the nanocrystals such as the versatile surface chemistry and ligand binding ability, the aptitude to generate reactive species, the possibility of encapsulation in different materials while retaining native luminescence providing the means for the implementation of renewable chemosensors or even the utilisation of more drastic and even stability impairing reaction conditions, is hitherto very limited. In this review, we provide insights into the analytical potential of quantum dots focusing on prospects of their utilisation in automated flow-based and flow-related approaches and the future outlook of QDs applications in chemical analysis.
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19
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Quantum dot based rapid tests for zearalenone detection. Anal Bioanal Chem 2012; 403:3013-24. [DOI: 10.1007/s00216-012-5981-z] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Revised: 03/20/2012] [Accepted: 03/26/2012] [Indexed: 12/31/2022]
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20
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Li L, Lu Y, Ding Y, Zhang F, Wang Y. Facile aqueous synthesis of functionalized CdTe nanoparticles and their application as fluorescence probes for determination of adenine and guanine. CAN J CHEM 2012. [DOI: 10.1139/v11-144] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Thioglycolic acid (TGA)-capped CdTe nanoparticles (NPs) were synthesized in aqueous medium, and their application as fluorescence probes in the detection of adenine and guanine was studied. The TGA-capped CdTe NPs were characterized by transmission electron microscopy, X–ray diffraction spectrometry, spectrofluorometry, Fourier transform infrared, and ultraviolet-visible spectrometry. Based on the significant enhancement of fluorescence emission of these CdTe fluorescence probes in the presence of adenine or guanine, a quantitative analysis method for these purines was proposed. Experimental conditions that govern the extent of fluorescence enhancement were optimized. Under the optimal conditions, the relative fluorescence intensity versus adenine or guanine concentrations gave a linear response, permitting the dynamic range of 7.0 × 10−7–1.0 × 10−4 mol/L and 6.0 × 10−7–9.0 × 10−5 mol/L for adenine and guanine, respectively. The method has also been applied successfully to the detection of adenine and guanine in synthetic samples with satisfactory results.
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Affiliation(s)
- Li Li
- Department of Chemistry, Shanghai University, Shanghai, 200444, P.R. China
| | - Yaxiang Lu
- Department of Chemistry, Shanghai University, Shanghai, 200444, P.R. China
| | - Yaping Ding
- Department of Chemistry, Shanghai University, Shanghai, 200444, P.R. China
| | - Fenfen Zhang
- Department of Chemistry, Shanghai University, Shanghai, 200444, P.R. China
| | - Yaping Wang
- Department of Chemistry, Shanghai University, Shanghai, 200444, P.R. China
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21
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Selva Kumar LS, Thakur M. Competitive immunoassay for analysis of vitamin B12. Anal Biochem 2011; 418:238-46. [DOI: 10.1016/j.ab.2011.07.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Revised: 07/10/2011] [Accepted: 07/11/2011] [Indexed: 10/17/2022]
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22
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Vinayaka AC, Thakur MS. Photoabsorption and Resonance Energy Transfer Phenomenon in CdTe−Protein Bioconjugates: An Insight into QD−Biomolecular Interactions. Bioconjug Chem 2011; 22:968-75. [DOI: 10.1021/bc200034a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aaydha C. Vinayaka
- Fermentation Technology & Bioengineering Department, Central Food Technological Research Institute (A constituent laboratory of Council of Scientific and Industrial Research, New Delhi), Mysore-570020, India
| | - Munna S. Thakur
- Fermentation Technology & Bioengineering Department, Central Food Technological Research Institute (A constituent laboratory of Council of Scientific and Industrial Research, New Delhi), Mysore-570020, India
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23
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Baş D, Boyaci IH. Photoelectrochemical competitive DNA hybridization assay using semiconductor quantum dot conjugated oligonucleotides. Anal Bioanal Chem 2011; 400:703-7. [PMID: 21442370 DOI: 10.1007/s00216-011-4827-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 02/17/2011] [Accepted: 02/19/2011] [Indexed: 11/26/2022]
Abstract
A competitive DNA hybridization assay based on the photoelectrochemistry of the semiconductor quantum dot-single stranded DNA conjugates (QD-ssDNA) was developed. Hybridization of QD-ssDNA with the capture probe DNA immobilized on the indium-tin oxide electrodes enables photocurrent generation when the electrochemical cell was illuminated with a light source. Upon the competition between QD-ssDNA and single-stranded target DNA, the photocurrent response decreased with the increase in the target DNA concentration. A linear relationship between the photocurrent and the target DNA concentration was obtained (R(2) = 0.991). The selectivity of system towards the target DNA was also demonstrated using non-complementary sample.
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Affiliation(s)
- Deniz Baş
- Department of Food Engineering, Hacettepe University, Beytepe, Ankara, Turkey
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