Protein conformation driven biomimetic synthesis of semiconductor nanoparticles

Ghosh, Dipankar; Mondal, Samir K.; Ghosh, Srabanti; Saha, Abhijit

doi:10.1039/c1jm13730a

Cited by 53 publications

(55 citation statements)

References 52 publications

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“…DLS measurements showed the size of free BSA molecules to be 2.2 and 3.5 nm at pH 6 and 4, respectively (Figure ). This slight increase in size of BSA with decrease in pH value may be attributed to unfolding of the BSA with decreasing pH, which is supported by circular dichroism spectroscopy (see the Supporting Information) and the observed result is consistent with our earlier report . Thus, from the observed DLS results, it can reasonably be assumed that the particle formation occurs on the surface groups of the protein molecule, which may involve carboxyl and amide groups as reflected from the FTIR results.…”

Section: Resultssupporting

confidence: 91%

“…Hence, the present report describes the optimal synthesis conditions of ZnSe QDs encapsulated with abundantly available bovine serum albumin (BSA), which plays an important role in the circulatory system and also overcomes the drawbacks of using short‐chain biomolecules and peptides such as MAA (mercaptoacetic acid), MPA (mercaptopropanoic acid), cysteine, GSH (glutathione), etc., in terms of toxicity and availability of a number of binding sites. In our earlier work, we demonstrated how the protein conformation can direct the synthesis of Cd II based nanoparticles and can control the particle characteristics, including size, distribution, PLQE (photoluminescence quantum efficiency), etc . This has prompted us to look into the synthesis process of Zn II based materials.…”

Section: Introductionmentioning

confidence: 99%

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Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing

et al. 2017

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In view of their promising bio-applicability, we have synthesized water-soluble bovine serum albumin (BSA)-encapsulated ZnSe quantum dots (QDs) with visible emission with longer average luminescence lifetimes of approximately 125 ns at ambient conditions. BSA-ZnSe QDs are shown to be efficient selective copper ion probes in the presence of physiologically important metal ions through luminescence quenching with a high Stern-Volmer constant (3.3×10 m ). The mechanism of sensing has been explained in terms of electron transfer processes and the apparent rate of electron transfer (K ) from ZnSe QDs to Cu has been calculated to be 2.8×10 s . It is demonstrated that the negative conduction band potential plays a major role in the feasibility of the electron transfer process, which is reflected in the higher efficacy of ZnSe QDs in sensing copper(II) ions over other group II-VI quantum dots, namely, CdSe, ZnS, or CdS. The results observed with cysteine-capped QDs are almost identical to those with BSA-encapsulated QDs and this presumably negates the possible reason of Cu ion induced quenching ascribed to its binding with surface groups or replacement of metal sites as proposed by several groups previously.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing

et al. 2017

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“…The revealed peaks in the region of 2500–3300 cm −1 [Figure (c)] corresponded to OH in acidic agent in the BSA backbone. The peaks of the carbonyl group (CO stretch) related to amid groups appeared at 1657 cm −1 and the revealed peak in 1537 cm −1 dedicated to CN . In [Figure (b)], the broad peak at 3450 cm −1 was ascribed to OH stretching and OH‐bending peak was shown at 1630 cm −1 .…”

Section: Resultsmentioning

confidence: 98%

Employment of ultrasonic waves for the preparation of PVA/TiO₂‐BSA nanocomposites: Mechanical, thermal, and optical properties

Mallakpour

Shamsaddinimotlagh

2018

J of Applied Polymer Sci

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The goal of this project is to obtain poly(vinyl alcohol) (PVA)/TiO2‐bovine serum albumin (BSA) nanocomposite (NC) films in different weight percentages of modified TiO2. For this purpose, to prevent the accumulation of nanoparticles (NPs) in the PVA matrix, the surface of the TiO2 NPs was treated with the BSA molecules. To achieve this aim, ultrasonic waves were used as an environmentally friendly and green process that decrease the time of reactions, help better spreading of TiO2 NPs and maintain dimensions of TiO2 NPs in the nanoscale range. In the end, the features of the PVA/TiO2‐BSA NC films were considered with a variety of techniques. The Fourier transform infrared spectroscopy, energy dispersive X‐ray, and X‐ray diffraction showed that the BSA was well placed on the surface of TiO2 NPs. The thermal gravimetric analysis and UV‐visible results demonstrated that all the PVA/TiO2‐BSA NC films have better thermal and optical properties than the pure PVA. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46558.

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“…16 In this study, we report, for the first time, a facile natural polymer feather keratin-assisted method for synthesizing highly efficient photocatalyst CdS. 16 In this study, we report, for the first time, a facile natural polymer feather keratin-assisted method for synthesizing highly efficient photocatalyst CdS.…”

Section: Introductionmentioning

confidence: 95%

Photodegradation of Rhodamine B over a novel photocatalyst of feather keratin decorated CdS under visible light irradiation

Wang

Lian

et al. 2015

New J. Chem.

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A novel photocatalyst of feather keratin (FK)-decorated CdS was synthesized by a simple co-precipitation method. Scanning electron microscopy (SEM) showed that the particle sizes of FK/CdS nanocomposites were smaller than pure CdS. The coexistence of FK and CdS in the photocatalysts was further confirmed by Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The results of photocatalytic experiments demonstrated that the FK/CdS composites exhibit significantly enhanced photocatalytic activity for the photocatalytic degradation of RhB compared with pure CdS under visible light irradiation. The enhanced photocatalytic activity of the FK/CdS composites can be attributed to the similar affinity between FK and RhB, which can effectively separate the photogenerated electron-hole pairs. This method not only improves the photocatalytic activity of CdS, but also reduces the environmental pollution of waste feathers. In addition, the possible degradation mechanism of RhB is proposed.

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Protein conformation driven biomimetic synthesis of semiconductor nanoparticles

Cited by 53 publications

References 52 publications

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing

Employment of ultrasonic waves for the preparation of PVA/TiO₂‐BSA nanocomposites: Mechanical, thermal, and optical properties

Photodegradation of Rhodamine B over a novel photocatalyst of feather keratin decorated CdS under visible light irradiation

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Protein conformation driven biomimetic synthesis of semiconductor nanoparticles

Cited by 53 publications

References 52 publications

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced CuII Ion Sensing

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced CuII Ion Sensing

Employment of ultrasonic waves for the preparation of PVA/TiO2‐BSA nanocomposites: Mechanical, thermal, and optical properties

Photodegradation of Rhodamine B over a novel photocatalyst of feather keratin decorated CdS under visible light irradiation

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Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing

Aqueous Synthesis of Protein‐Encapsulated ZnSe Quantum Dots and Physical Significance of Semiconductor‐Induced Cu^II Ion Sensing

Employment of ultrasonic waves for the preparation of PVA/TiO₂‐BSA nanocomposites: Mechanical, thermal, and optical properties