Highly selective colorimetric detection of spermine in biosamples on basis of the non-crosslinking aggregation of ssDNA-capped gold nanoparticles

Liu, Zhong De; Zhu, Hai; Zhao, Hui; Huang, Cheng

doi:10.1016/j.talanta.2012.10.079

Cited by 27 publications

(16 citation statements)

References 32 publications

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“…The hydrodynamic size increased with elevated SPM concentration, causing a larger degree of aggregation, but unlike the results from Liu et al. for 13 nm AuNPs, our results showed that the zeta‐potential of 4 nm AuNPs remained nearly constant instead of gradually restoring to a more positive level . This might be due to most SPM molecules being embedded in the core of aggregates.…”

Section: Resultscontrasting

confidence: 96%

“…During the study of the DNA concentration effect, it was interesting to observe a drop of sensitivity towards SPM when more DNA was added during the assay. This contradicted the previous suggestion that SPM‐induced aggregation occurred through DNA molecules by an ion‐bridging effect and non‐crosslinking mechanism . A control experiment in the absence of DNA was therefore performed to gain more information.…”

Section: Resultsmentioning

confidence: 67%

“…Another interesting article was reported by Liu et al. about the use of single strand (ss)DNA‐capped AuNPs to achieve SPM sensing based on a non‐crosslinking mechanism, although it left a lot of unanswered questions . Therefore, in this report, we performed a more comprehensive study on this phenomenon.…”

Section: Introductionmentioning

confidence: 90%

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Study of the Aggregation of DNA‐Capped Gold Nanoparticles: A Smart and Flexible Aptasensor for Spermine Sensing

Tsoi

et al. 2017

ChemPlusChem

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As mart gold nanoparticle based aptasensor is developed for the sensing of this biomarker in ac onvenient and fast manner. Acomprehensive study was performed to elucidate the driving force of DNA adsorption,d ifferent factors' effects, such as gold nanoparticle size, DNA length, concentration, and working pH towardss permine sensing by using UV/Vis absorption spectroscopya nd isothermalt itration calorimetry.I tw as found that the developed aptasensor could detectspermine by two differ-ent sensing mechanismss imply by adjustingt he DNA concentration without complicated procedures. Good performance in complicated matrices was provenb yt he satisfactory results obtained in the spike analysis of both artificial urine and clinical urine samples. Such af lexible and smart approach described here would provide au seful tool for the fast sensing of spermine and prostatec ancer screening.[a] T.

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Section: Resultscontrasting

confidence: 96%

Section: Resultsmentioning

confidence: 67%

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Study of the Aggregation of DNA‐Capped Gold Nanoparticles: A Smart and Flexible Aptasensor for Spermine Sensing

Tsoi

et al. 2017

ChemPlusChem

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“…Noble metal nanomaterials (e.g., Au and Ag) have been commonly used to develop highly sensitive colorimetric probes for the determination of biomolecules 21,22 , drugs 23 , toxicants [24][25][26][27][28] and small molecules [29][30][31] due to their optical and electrical properties and biocompatibility 32,33 . Ag nano materials are more cost effective in their preparation than Au nano materials.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles-Based Nano-drop Spectrophotometric Determination of Cationic Surfactants Coupled with Hydrophobic Interaction; An Application to Pharmaceuticals and Environmental

Sharma¹,

Tapadia²

2016

Orient. J. Chem

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The proposed work describes the nanodrop spectrophotometric determination of cationic surfactants using citrate-modified silver nanoparticles based on the aggregation of silver nanoparticles induced by cationic surfactants due to the hydrophobic effect. The visible color change in the solution of silver nanoparticle includes a red shift with the quenching of the absorption spectra. The maximum absorbance was measured at wavelength, λ max 400 nm. The concentrations of cationic surfactants were determined using a nanodrop spectrophotometer with limits of detection of 15.0, 8.0, 6.0, 5.8, and 13.0 µM for dodecyl trimethyl ammonium bromide, myristil trimethyl ammonium bromide, cetrimonium trimethyl ammonium bromide, cetyl pyridinium chloride and benzalkonium chloride, respectively. The proposed method was successfully applied for the determination of cetyl pyridinium chloride in commercial mouthwasher, gum astringent and nasal spray pharmaceuticals and environmental samples.

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“…Adsorption of ssDNA on Au NPs is well known for enhancing the electrostatic repulsion between Au NPs and preventing them from salt-induced aggregation. 26,27 Hence, we incubated CA aptamer sequences with Au NPs, and then challenged the Au NPs and Apt-Au NP solution with NaCl (25 mM and 50 mM). As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Colorimetric detection of cholic acid based on an aptamer adsorbed gold nanoprobe

Zhu

et al. 2017

RSC Adv.

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Highly selective colorimetric detection of spermine in biosamples on basis of the non-crosslinking aggregation of ssDNA-capped gold nanoparticles

Cited by 27 publications

References 32 publications

Study of the Aggregation of DNA‐Capped Gold Nanoparticles: A Smart and Flexible Aptasensor for Spermine Sensing

Study of the Aggregation of DNA‐Capped Gold Nanoparticles: A Smart and Flexible Aptasensor for Spermine Sensing

Silver Nanoparticles-Based Nano-drop Spectrophotometric Determination of Cationic Surfactants Coupled with Hydrophobic Interaction; An Application to Pharmaceuticals and Environmental

Colorimetric detection of cholic acid based on an aptamer adsorbed gold nanoprobe

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