Bioconjugation of CdTe quantum dot for the detection of 2,4-dichlorophenoxyacetic acid by competitive fluoroimmunoassay based biosensor

Vinayaka, Aaydha Chidambara; Basheer, Shabana; Thakur, M. S.

doi:10.1016/j.bios.2008.08.042

Cited by 126 publications

(45 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, fluorescent detection has attracted a great deal of interest for various chemically, environmentally, and biologically significant species such as 2,4-D (Vinayaka et al, 2009), owing to the capabilities of high sensitivity and convenience (Geng et al, 2010;Vinayaka et al, 2009;Yu et al, 2015;Zhang et al, 2015a;Zhu et al, 2014). It is considered to be an efficient way to develop MIP-based fluorescence sensors, which will combine the advantages of high selectivity of MIPs recognition and high sensitivity of fluorescence detection (Vinayaka et al, 2009;Wu et al, 2015;Zhang et al, 2015b).…”

Section: Introductionmentioning

confidence: 99%

“…It is considered to be an efficient way to develop MIP-based fluorescence sensors, which will combine the advantages of high selectivity of MIPs recognition and high sensitivity of fluorescence detection (Vinayaka et al, 2009;Wu et al, 2015;Zhang et al, 2015b). To date, most of the sensors are focused on fluorescence turn off, in which the fluorescence signal is diminished in the presence of the target analyte (Wu et al, 2015;Zhang et al, 2015b).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A molecular imprinting-based turn-on Ratiometric fluorescence sensor for highly selective and sensitive detection of 2,4-dichlorophenoxyacetic acid (2,4-D)

Wang

et al. 2016

Biosensors and Bioelectronics

168

View full text Add to dashboard Cite

a b s t r a c tA novel molecular imprinting-based turn-on ratiometric fluorescence sensor was constructed via a facile sol-gel polymerization for detection of 2,4-dichlorophenoxyacetic acid (2,4-D) on the basis of photoinduced electron transfer (PET) by using nitrobenzoxadiazole (NBD) as detection signal source and quantum dots (QDs) as reference signal source. With the presence and increase of 2,4-D, the amine groups on the surface of QDs@SiO 2 could bind with 2,4-D and thereby the NBD fluorescence intensities could be significantly enhanced since the PET process was inhibited, while the QDs maintained constant intensities. Accordingly, the ratio of the dual-emission intensities of green NBD and red QDs could be utilized for turn-on fluorescent detection of 2,4-D, along with continuous color changes from orange-red to green readily observed by the naked eye. The as-prepared fluorescence sensor obtained high sensitivity with a low detection limit of 0.14 μM within 5 min, and distinguished recognition selectivity for 2,4-D over its analogs. Moreover, the sensor was successfully applied to determine 2,4-D in real water samples, and high recoveries at three spiking levels of 2,4-D ranged from 95.0% to 110.1% with precisions below 4.5%. The simple, rapid and reliable visual sensing strategy would not only provide potential applications for high selective ultratrace analysis of complicated matrices, but also greatly enrich the research connotations of molecularly imprinted sensors.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A molecular imprinting-based turn-on Ratiometric fluorescence sensor for highly selective and sensitive detection of 2,4-dichlorophenoxyacetic acid (2,4-D)

Wang

et al. 2016

Biosensors and Bioelectronics

168

View full text Add to dashboard Cite

show abstract

“…Moreover, plantcell damage with the NPs was minimal with increased plant regeneration. Furthermore, it has earlier been demonstrated that a honeycomb surface functionalized mesoporous silica NP system with 3 nm pores capped with disulphide bond held gold NPs (10-15 nm) transported DNA and chemicals into isolated plant cells and intact leaves with the help of gene gun [42].…”

Section: Field Application Of Nano Formulationsmentioning

confidence: 99%

The Role of Nanoscience and Technology in Medicine and Agriculture: Awareness Implication for Health Systems and Food Safety Issues

C¹

2017

JNMR

View full text Add to dashboard Cite

The problems of diseases resistance to drugs in Medicine and low productivity in Agriculture have led to alternatives for improvements in health care systems and food safety issues. Nanotechnology is currently the chosen option for preparation and delivery of human drugs, pesticides and herbicides among other applications. Agriculture and medicine are competitive in sustenance of life without one substituting the other. This review paper therefore, examined some of the positive and negative effects of nanotechnology application in life and the awareness implication. Nanoparticles (NPs) system could be used for several routes of administration including oral, nasal, parenteral, intra-ocular benefits over free antimicrobial agents. The use of nanomaterials in the production of goods and drug formulations have shown superior properties compared with their conventional counterparts, due to their distinctive nanoscale features. Nanoparticles (NPs) have also consistently been reported to decrease infection, reduce scar tissue growth, and promote bone growth among other benefits. Nanotechnology may have concrete solutions against many agriculture-related problems like insect pest management, adverse effects of chemical pesticides, development of improved crop varieties. As with any other technology, controversy surrounding nanotechnology is no exception in a heterogeneous society. The toxic effects of antimicrobial NPs on central nervous system (CNS) are still unknown, interactions of NPs with the cells and tissues in CNS were poorly understood. Again, NPs represent size-specific properties that limit the use of currently available in vitro experiments in a general way, and there was no standardized definition for NP dose in mass, number, surface area, and biological samples (e.g., blood, urine, and inside organs that guarantee safety limit). Educating and training of consumers through seminars and workshops is recommended. National governments especially in developing countries are advised to mount regulating agencies that will be responsible for awareness creation and achieving optimum utilization of new products.

show abstract

“…Recent studies have shown that QD luminescence intensity can be tailored by employing an electron transfer process [88]. The use of this fundamental concept can be utilized for detecting small organic molecules, metal ions, and anions through luminescence quenching and for selective sensing of heavy-metal ions by fluorescence enhancement [31,46,[89][90]. In addition, the quality of water-dispersible CdTe QDs has been significantly improved over the years, which further expands their potential in sensor development and application.…”

Section: Functionalized Cdte Quantum Dots For Sensing Applicationsmentioning

confidence: 99%

Aqueous phase synthesis of CdTe quantum dots for biophotonics

Yong

Law

Roy

et al. 2010

Journal of Biophotonics

View full text Add to dashboard Cite

Over the past few years, CdTe quantum dots have been demonstrated as powerful probes for biophotonics applications. The aqueous phase synthesis technique remains the best approach to make high quality CdTe QDs in a single‐pot process. CdTe QDs prepared directly in the aqueous phase can have quantum yield as high as 80%. In addition, the surface of CdTe QDs prepared using the aqueous phase technique is functionalized with reactive groups that enable them to be directly conjugated with specific ligands for targeted delivery and sensing. In this contribution, we review recent progress in fabricating aqueous CdTe QDs and exploiting their optical properties in novel approaches to biomedical imaging and sensing applications. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Bioconjugation of CdTe quantum dot for the detection of 2,4-dichlorophenoxyacetic acid by competitive fluoroimmunoassay based biosensor

Cited by 126 publications

References 30 publications

A molecular imprinting-based turn-on Ratiometric fluorescence sensor for highly selective and sensitive detection of 2,4-dichlorophenoxyacetic acid (2,4-D)

A molecular imprinting-based turn-on Ratiometric fluorescence sensor for highly selective and sensitive detection of 2,4-dichlorophenoxyacetic acid (2,4-D)

The Role of Nanoscience and Technology in Medicine and Agriculture: Awareness Implication for Health Systems and Food Safety Issues

Aqueous phase synthesis of CdTe quantum dots for biophotonics

Contact Info

Product

Resources

About