A highly selective and colorimetric assay of lysine by molecular-driven gold nanorods assembly

Wang, Jian; Zhang, Pu; Li, Chun Mei; Li, Yuan Fang; Huang, Cheng

doi:10.1016/j.bios.2012.02.001

Cited by 63 publications

(17 citation statements)

References 41 publications

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“…Moreover, it has been reported that while dressing NPs with DMSA intra- or inter-connection among NPs via disulfide bridge (S-S) can be found, depending upon the DMSA surface grafting coefficient to favor the former or the latter connection 33 . Influence of medium’s pH and surface grafting coefficient in determining particle assembly has been also reported in the literature 12 15 34 35 .…”

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confidence: 76%

Magnetic nanoparticle film reconstruction modulated by immersion within DMSA aqueous solution

Teixeira

Sun

et al. 2016

Sci Rep

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The process of reconstruction of pre-fabricated films comprising maghemite nanoparticles deposited onto flat glass substrates triggered by immersion into aqueous solutions of meso-2,3-dimercaptosuccinic acid (DMSA) at increasing concentration (0.025, 0.050, and 0.100 mol/L) is herein reported. The evolution of this process was assessed by measuring the time (t) dependence of the particle analysis histogram width (W) extracted from atomic force microscopy images. Furthermore, a physical picture to model the film reconstruction which provides reconstruction time constants associated to single particles (τ1) and small agglomerates (τn), the key units associated to the process, ranging from τ1 = 2.9 and τn = 3.4 hour (0.025 mol/L) to τ1 = 5.1 and τn = 4.6 hour (0.100 mol/L) is proposed. The nanoparticle-based film reconstruction triggered by an exogenous stimulus, the use of the W versus t data to describe the process and the model picture accounting for the recorded data have not been previously reported.

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mentioning

confidence: 76%

Magnetic nanoparticle film reconstruction modulated by immersion within DMSA aqueous solution

Teixeira

Sun

et al. 2016

Sci Rep

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“…Au NRs can be used to identify lysine amino acid of specific viruses. This detection occurs when a chain of Au NR connected to one another at their ends is formed in the presence of 11-mercaptoundecanoic acid (MUA) [142]. This is because the MUA is able to modify the ends of the Au NR by binding to the Au NR ends, such that the MUA interacts with each other to cause Au NR to be able to self-assemble by joining to other Au NR end-toend.…”

Section: Gold Nanorods (Au Nr)mentioning

confidence: 99%

“…This results in the long chain separating to form an assay of dispersed Au NR, which leads to a shift in the absorption spectra from the initial red to blue in the presence of virus lysine. Longitudinal plasmon resonance is used instead of transverse plasmon resonance due to the difference in wavelength, as the change in wavelength in the longitudinal direction is easily observable in the visible light spectrum [142]. In this work, Eu 3+ is added because it causes a more obvious color change to be observed compared to using other molecules or ions.…”

Section: Gold Nanorods (Au Nr)mentioning

confidence: 99%

Colorimetric biosensors for point-of-care virus detections

Zhao

Wong

Zheng

et al. 2020

Materials Science for Energy Technologies

102

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a b s t r a c tColorimetric biosensors can be used to detect a particular analyte through color changes easily by naked eyes or simple portable optical detectors for quantitative measurement. Thus, it is highly attractive for point-of-care detections of harmful viruses to prevent potential pandemic outbreak, as antiviral medication must be administered in a timely fashion. This review paper summaries existing and emerging techniques that can be employed to detect viruses through colorimetric assay design with detailed discussion of their sensing principles, performances as well as pros and cons, with an aim to provide guideline on the selection of suitable colorimetric biosensors for detecting different species of viruses. Among the colorimetric methods for virus detections, loop-mediated isothermal amplification (LAMP) method is more favourable for its faster detection, high efficiency, cheaper cost, and more reliable with high reproducible assay results. Nanoparticle-based colorimetric biosensors, on the other hand, are most suitable to be fabricated into lateral flow or lab-on-a-chip devices, and can be coupled with LAMP or portable PCR systems for highly sensitive on-site detection of viruses, which is very critical for early diagnosis of virus infections and to prevent outbreak in a swift and controlled manner.

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“…gold nanoparticles (AuNPs) [10][11][12], gold nanorods (AuNRs) [13][14][15], carbon dots (CDs) [16][17][18] and quantum dots (QDs) [19,20]. Among various nano-materials, AuNPs have attracted a great deal of attention for chemical and biological analysis over past decades.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive fluorescence detection of copper ion based on its catalytic oxidation to cysteine indicated by fluorescein isothiocyanate functionalized gold nanoparticles

Wang

Zhang

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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h i g h l i g h t s• A fluorescent probe for Cu 2+ has been developed by FITC functionalized gold nanoparticles.• Cysteine could replace FITC from the surfaces of gold nanoparticles and Cu 2+ could catalyze O 2 oxidation of cysteine.• The fluorescent probe provides high sensitivity toward Cu 2+ in drinking water as a real sample. g r a p h i c a l a b s t r a c t could catalyze O 2 oxidation of cysteine, and the generated disulfide cystine could not remove FITC from AuNPs' surface. Therefore, the recovery of fluorescence intensity was much weaker when compared with that of in the absence of Cu 2+ . And on the basis of this principle the concentration of Cu 2+ could be detected quantitatively. Under optimal conditions, our method exhibited high selectivity toward Cu 2+ and provided a good linear relationship in the range of 1.0-17.0 nM with the detection limit of 0.37 nM calculated by 3 /S. Furthermore, complicated synthetic procedures and poor water solubility could be ignored in this proposed fluorescent sensor.

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A highly selective and colorimetric assay of lysine by molecular-driven gold nanorods assembly

Cited by 63 publications

References 41 publications

Magnetic nanoparticle film reconstruction modulated by immersion within DMSA aqueous solution

Magnetic nanoparticle film reconstruction modulated by immersion within DMSA aqueous solution

Colorimetric biosensors for point-of-care virus detections

Highly sensitive fluorescence detection of copper ion based on its catalytic oxidation to cysteine indicated by fluorescein isothiocyanate functionalized gold nanoparticles

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