Interactions between thioglycolic acid capped CdSe/ZnS nanoparticles and papain

Kaur, Gurvir; Bharti, Shivani; Tripathi, Satyendra Kumar

doi:10.1016/j.jlumin.2017.11.046

“…topics have been central in previous reports (see references [104][105][106][107][108][109][110][111][112][113][114][115][116], (Figure 61), [117,118], (Figure 62), [119] (Figure 63), [120][121][122][123][124][125][126][127][128][129] Karimi et al synthesized carbon nanotube-cadmium selenide nanocomposites by electrophoretic deposition. From their investigation with the variation of 30%, 40%, 50%, 80%, and 90% also 120 V, 160 V, 200 V and 240 V potential, it is known that the optimum conditions for the synthesis of these materials is 50% of carbon nanotube; the yield of quantum dot deposition is 0.00035 g•cm −2 using 240 V. These results are also in line with the luminescence data in which it is found that 50% of carbon nanotube-cadmium selenide composite has the highest intensity of the others studied.…”

Section: Selenium In Physics Surfaces and Nanoscience With Regard To Sensing And Fluorescencementioning

confidence: 92%

“…There are many points relating to aspects of frontiers in science. Some issues of papers that we list here but do not comment on involve nanoparticle, CdSe materials, cancer cells, Cu(In,Ga)Se 2 materials, zinc selenite coatings with GSH, water solubility, fluorescent and electrochemical methods, CdSe/ZnS thioglycolic acid coatings, physicochemical characterization, Beta lactoglobulin levels, O 2− and Cu 2+ detection, dimercaprol–capped QD systems, hydrodynamic radii, confocal fluorescent selenous acid, etc; These and many more topics have been central in previous reports (see references [ 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 ], ( Figure 61 ), [ 117 , 118 ], ( Figure 62 ), [ 119 ] ( Figure 63 ), [ 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 ]).…”

Section: Selenium In Physics Surfaces and Nanoscience With Regarmentioning

confidence: 99%

Discussions of Fluorescence in Selenium Chemistry: Recently Reported Probes, Particles, and a Clearer Biological Knowledge

Abdillah

¹

,

Sonawane

²

,

Kim

³

et al. 2021

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In this review from literature appearing over about the past 5 years, we focus on selected selenide reports and related chemistry; we aimed for a digestible, relevant, review intended to be usefully interconnected within the realm of fluorescence and selenium chemistry. Tellurium is mentioned where relevant. Topics include selenium in physics and surfaces, nanoscience, sensing and fluorescence, quantum dots and nanoparticles, Au and oxide nanoparticles quantum dot based, coatings and catalyst poisons, thin film, and aspects of solar energy conversion. Chemosensing is covered, whether small molecule or nanoparticle based, relating to metal ion analytes, H2S, as well as analyte sulfane (biothiols—including glutathione). We cover recent reports of probing and fluorescence when they deal with redox biology aspects. Selenium in therapeutics, medicinal chemistry and skeleton cores is covered. Selenium serves as a constituent for some small molecule sensors and probes. Typically, the selenium is part of the reactive, or active site of the probe; in other cases, it is featured as the analyte, either as a reduced or oxidized form of selenium. Free radicals and ROS are also mentioned; aggregation strategies are treated in some places. Also, the relationship between reduced selenium and oxidized selenium is developed.

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“…In this study, we investigated the interactions of papain molecules with DNA-SWNTs using AFM in liquids. Papain is a cysteine protease with a high thermostability [46][47][48] . Although several enzymes lose their activity at 60 °C, papain exhibits sufficient enzyme activity at this temperature.…”

Section: Openmentioning

confidence: 99%

Hybridization of papain molecules and DNA-wrapped single-walled carbon nanotubes evaluated by atomic force microscopy in fluids

Kitamura

¹

,

Umemura

²

2023

Sci Rep

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Although various conjugates of single-walled carbon nanotubes (SWNTs) and biomolecules, such as nanobiosensors and nanobiodevices, have been reported, the conjugation of papain and SWNTs have not been reported because of the formation of unexpected aggregates. In this study, atomic force microscopy (AFM) in liquid was used to investigate the interactions between papain and DNA-wrapped SWNTs (DNA–SWNTs) at two different pH values (pH 3.0 and 10.5). The direct AFM observation of the mixture of papain and DNA–SWNTs confirmed the aggregation of papain molecules with DNA–SWNTs in the buffer solutions. The numerous and non-uniform adsorption of papain molecules onto DNA–SWNTs was more pronounced at pH 3.0 than that at pH 10.5. Furthermore, thick conjugates appeared when papain and DNA–SWNTs were simultaneously mixed. The near-infrared photoluminescence spectra of the SWNTs drastically changed when the papain molecules were injected into the DNA–SWNT suspension at pH 3.0. Thus, the regulation of electrostatic interactions is a key aspect in preparing optimal conjugates of papain and DNA–SWNTs. Furthermore, although previous papers reported AFM images of dried samples, this study demonstrates the potential of AFM in liquid in evaluating individual bioconjugates of SWNTs.

show abstract

“…In this study, we investigated the interactions of papain molecules with DNA-SWNTs using AFM in liquids. Papain is a cysteine protease with a high thermostability [46][47][48] . Although several enzymes lose their activity at 60°C, papain exhibits su cient enzyme activity at this temperature.…”

Section: Introductionmentioning

confidence: 99%

Hybridization of papain molecules and DNA- wrapped single-walled carbon nanotubes evaluated by atomic force microscopy in fluids

Kitamura

¹

,

Umemura

²

2022

Preprint

0

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Although various conjugates of single-walled carbon nanotubes (SWNTs) and biomolecules, such as nanobiosensors and nanobiodevices, have been reported, the conjugation of papain and SWNTs have not been reported because of the formation of unexpected aggregates. In this study, atomic force microscopy (AFM) in liquid was used to investigate the interactions between papain and DNA-wrapped SWNTs (DNA–SWNTs) at two different pH values (pH 3.0 and 10.5). The direct AFM observation of the mixture of papain and DNA–SWNTs confirmed the aggregation of papain molecules with DNA–SWNTs in the buffer solutions. The numerous and non-uniform adsorption of papain molecules onto DNA–SWNTs was more pronounced at pH 3.0 than that at pH 10.5. Furthermore, thick conjugates appeared when papain and DNA–SWNTs were simultaneously mixed. The near-infrared photoluminescence spectra of the SWNTs drastically changed when the papain molecules were injected into the DNA–SWNT suspension at pH 3.0. Thus, the regulation of electrostatic interactions is a key aspect in preparing optimal conjugates of papain and DNA–SWNTs. Furthermore, although previous papers reported AFM images of dried samples, this study demonstrates the potential of AFM in liquid in evaluating individual bioconjugates of SWNTs.

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Interactions between thioglycolic acid capped CdSe/ZnS nanoparticles and papain

Cited by 15 publications

References 43 publications

Discussions of Fluorescence in Selenium Chemistry: Recently Reported Probes, Particles, and a Clearer Biological Knowledge

Discussions of Fluorescence in Selenium Chemistry: Recently Reported Probes, Particles, and a Clearer Biological Knowledge

Hybridization of papain molecules and DNA-wrapped single-walled carbon nanotubes evaluated by atomic force microscopy in fluids

Hybridization of papain molecules and DNA- wrapped single-walled carbon nanotubes evaluated by atomic force microscopy in fluids

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