Physicochemistry of dispersions of HgO, HgS and ‘Makardhwaj’ (an Ayurvedic medicine) prepared in micelle and microemulsion templates

Mukherjee, Indrajyoti; Senapati, S. R.; Mitra, Debolina; Rakshit, Animesh Kumar; Das, Anindita; Moulik, Satya P.

doi:10.1016/j.colsurfa.2010.02.023

Cited by 22 publications

(11 citation statements)

References 25 publications

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“…3). The surface plasmon resonance of the pure uncoated bulk HgO was earlier reported by Mukherjee et al [14]. A comparative study of UV-Vis spectra of flower extract, mercuric acetate solution and freshly prepared plant protein-coated HgO nanoprticles has been depicted to confirm the formation of pure plant protein-coated HgO nanoparticles.…”

Section: Resultsmentioning

confidence: 70%

One-step green synthesis and characterization of plant protein-coated mercuric oxide (HgO) nanoparticles: antimicrobial studies

et al. 2015

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The present study demonstrates the bioreductive green synthesis of nanosized HgO using flower extracts of an ornamental plant Callistemon viminalis. The flower extracts of Callistemon viminalis seem to be environmentally friendly, so this protocol could be used for rapid production of HgO. Till date, there is no report of synthesis of nanoparticles using flower extract of Callistemon viminalis. Mercuric acetate was taken as the metal precursor in the present experiment. The flower extract was found to act as a reducing as well as a stabilizing agent. The phytochemicals present in the flower extract act as reducing agent which include proteins, saponins, phenolic compounds, phytosterols, and flavonoids. FT-IR spectroscopy confirmed that the extract had the ability to act as a reducing agent and stabilizer for HgO nanoparticles. The formation of the plant protein-coated HgO nanoparticles was first monitored using UV-Vis absorption spectroscopy. The UV-Vis spectroscopy revealed the formation of HgO nanoparticles by exhibiting the typical surface plasmon absorption maxima at 243 nm. The average particle size formed ranges from 2 to 4 nm. The dried form of synthesized nanoparticles was further characterized using TGA, XRD, TEM, and FTIR spectroscopy. FT-IR spectra of synthesized HgO nanoparticles were performed to identify the possible bio-molecules responsible for capping and stabilization of nanoparticles, which confirm the formation of plant protein-coated HgO nanoparticles that is further corroborated by TGA study. The optical band gap of HgO nanoparticle was measured to be 2.48 eV using cutoff wavelength which indicates that HgO nanoparticles can be used in metal oxide semiconductor-based photovoltaic cells. A possible core-shell structure of the HgO nanobiocomposite has been proposed.

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Section: Resultsmentioning

confidence: 70%

One-step green synthesis and characterization of plant protein-coated mercuric oxide (HgO) nanoparticles: antimicrobial studies

et al. 2015

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“…For larger sizes, n = 15, 16 and 20, it is very difficult for unbiased global search using GA-DFT method, and some typical 6 structures were modeled based on the geometric structures of small clusters. The isomers of (HgS) n (n = 2-8) and (HgS) n (n = [9][10][11][12][13][14][15][16]20) clusters are plotted in Figure 1 and Figure 2, respectively. Both the three lowest-energy isomers and the isomers with typical motifs, which may be the GM structures of some other clusters, are plotted.…”

Section: Resultsmentioning

confidence: 99%

“…The catenane structure 10V(D 2 ), known as GM structure of (AuSR) 10 , is 1.09 eV higher in energy than 10I. For (HgS) 11 , 11I (C s ) which consists of a 7-membered ring (chair like) and a 4-membered ring is most stable. 11IV with C 2 symmetry is the most stable configuration of (AuSR) 11 .…”

Section: Geometry Structuresmentioning

confidence: 97%

“…For (HgS) 11 , 11I (C s ) which consists of a 7-membered ring (chair like) and a 4-membered ring is most stable. 11IV with C 2 symmetry is the most stable configuration of (AuSR) 11 . The GM structure 12I…”

Section: Geometry Structuresmentioning

confidence: 98%

“…II-VI semiconductor materials play the central role in many areas of materials of modern science and technology [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Secondary bonding networks in small (HgS)n clusters: A theoretical investigation

Cheng

2015

Computational and Theoretical Chemistry

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Evaluation of Non‐Ambiguous Critical Micelle Concentration of Surfactants in Relation to Solution Behaviors of Pure and Mixed Surfactant Systems: A Physicochemical Documentary and Analysis

Moulik

Rakshit

Naskar

2021

J Surfact & Detergents

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Critical micelle concentration (CMC) is a fundamental physical parameter of surfactant aggregation in solution. The CMC is determined by different methods, tensiometry, conductometry, microcalorimetry, fluorimetry, and so on. However, it is known that though CMC is reported as a single value, in reality, micelle formation occurs over a narrow range of concentration for different experimental procedures produce different results. We shall discuss about a unique procedure of measuring correct CMC applicable to all potential methods used in practice. This is essential for the evaluation of thermodynamic properties of the micelle forming process in pure and mixed states in terms of solution theories. As we in this short documentary want to deal with various aspects of Milton Rosen's research-wherein we have also worked-a few other facets of surfactant chemistry research, besides the micelle formation, are also briefly discussed. In mixed surfactant systems, synergistic effects in various surfactant properties like detergency, foaming, solubilization, and so on are found whereas in some others non-synergistic effects are observed. Dehydration of micelles with an increase in temperature or by the addition of hydrophilic substances may cause clouding to the system. Soluble amphiphilic systems produce Gibbs monolayer at the air/water interface; insoluble amphiphiles form Langmuir monolayers.A documentary of the above aspects will be herein presented and discussed. We mention that this article is neither an original research article nor a review article. This is a mixture of the two: a documentary of both original research and some review of our works presented in memory of Prof. Milton Rosen.

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Physicochemistry of dispersions of HgO, HgS and ‘Makardhwaj’ (an Ayurvedic medicine) prepared in micelle and microemulsion templates

Cited by 22 publications

References 25 publications

One-step green synthesis and characterization of plant protein-coated mercuric oxide (HgO) nanoparticles: antimicrobial studies

One-step green synthesis and characterization of plant protein-coated mercuric oxide (HgO) nanoparticles: antimicrobial studies

Secondary bonding networks in small (HgS)n clusters: A theoretical investigation

Evaluation of Non‐Ambiguous Critical Micelle Concentration of Surfactants in Relation to Solution Behaviors of Pure and Mixed Surfactant Systems: A Physicochemical Documentary and Analysis

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