Qualitative assessment of silver and gold nanoparticle synthesis in various plants: a photobiological approach

Pala, Rajasekharreddy; Rani, Poonam; Sreedhar, B.

doi:10.1007/s11051-010-9894-5

Cited by 151 publications

(83 citation statements)

References 33 publications

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“…The vibrational bands correspond to the bonds such as aminuteso (N-H), -C=C (alkene), and C-Cl (Halogens) which were in the region range of 1,194-3,315 cm -1 . The most wide spectrum absorption was observed at 3,315 cm -1 , it can be attributed to the stretching vibrations of aminuteso (N-H) (Maliszewska and Sadowski 2009) and absorption peaks observed at 1,636 cm -1 can be attributed to the stretching vibration of -C=C (alkene) (Rajasekharreddy et al 2010). This FT-IR spectroscopic study confirmed that the carbonyl group of amino acid residues has a strong binding ability with silver, suggesting the formation of a layer covering silver nanoparticles and acting as a capping agent to prevent agglomeration and provide stability to the medium.…”

Section: Resultsmentioning

confidence: 95%

Synthesis of silver nanoparticles from stem bark of Cochlospermum religiosum (L.) Alston: an important medicinal plant and evaluation of their antimicrobial efficacy

et al. 2014

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The use of different parts of plants for the synthesis of nanoparticles is considered as a green technology as it does not involve any harmful chemicals. Herein, we report on rapid biosynthesis of silver nanoparticles (SNPs) from aqueous stem bark extract of Cochlospermum religiosum a medicinal plant. The reduced silver nanoparticles were characterized by using UV-Visible spectroscopy (UV-Vis), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis, atomic force microscopy, and Fourier transform infrared (FT-IR). The UV-Visible spectrum of the aqueous medium containing silver nanoparticles showed an absorption peak at around 445 nm, XRD showed that the particles are crystalline in nature, with a face-centered cubic structure and the SEM images showed that the spherical-shaped silver nanoparticles were observed and the size range was found to be 20-35 nm. FT-IR spectroscopy analysis revealed that carbohydrate, polyphenols, and protein molecules were involved in the synthesis and capping of silver nanoparticles. These phytosynthesized SNPs were tested for their antimicrobial activity and it analyzed by measuring the inhibitory zone. Cochlospermum religiosum aqueous stem bark extract of SNPs showed highest toxicity to Staphylococcus followed by Pseudomonas, Escherichia coli and Bacillus and lowest toxicity towards Proteus. Whereas in fungal species highest inhibition zone against Aspergillus flavus followed by Rhizopus, Fusarium, and Curvularia, and minimum inhibition zone was observed against Aspergillus niger species. The outcome of this study could be useful for the development of value added products from indigenous medicinal plants of India for nanotechnology-based biomedical applications.

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Section: Resultsmentioning

confidence: 95%

Synthesis of silver nanoparticles from stem bark of Cochlospermum religiosum (L.) Alston: an important medicinal plant and evaluation of their antimicrobial efficacy

et al. 2014

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“…However, these natural sources, which have active ingredients, produce nanoparticles at slower rate. To overcome this, photo-assisted biosynthesis of Ag and AuNPs using many plants has been qualitatively investigated [28]. The sunlight irradiation technique has been formerly reported for the synthesis of nanoparticles using few plant materials such as Allium sativum [29], Andrachnea chordifolia [30], Piper betle [31], Bacillus amyloliquefaciens [32] and Achyranthus aspera [33].…”

Section: Introductionmentioning

confidence: 99%

Photobiological synthesis of noble metal nanoparticles using Hydrocotyle asiatica and application as catalyst for the photodegradation of cationic dyes

2015

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Solar light induced photo catalysis by plasmonic nanoparticles such as Au and Ag is an important field in green chemistry. In this study an environmental benign method was investigated for the rapid synthesis of colloidal Ag and AuNPs using the extract of Hydrocotyle asiatica, as a reducing and stabilizing agent under sunlight irradiation. The nanoparticles were formed in few seconds and were characterized by UV-Vis., FT-IR, TEM, EDAX, XRD, DLS and Zetasizer. The nanoparticles were stable in aqueous solution for more than 6 months. TEM analysis established that the Ag and AuNPs were predominantly spherical with average size of 21 and 8 nm, respectively. The flavonoids and glycosides from the extract of H. asiatica were proved to be responsible for the reduction and capping through FT-IR analysis. The antimicrobial studies of AgNPs showed effective inhibitory activity against the clinical strains of gram-negative and positive bacteria. The localized surface plasmon resonance of AgNPs was used for the photo-driven degradation of cationic dyes (malachite green and methylene blue). Thus, this green technique can be used for bulk production of AgNPs, and thus prepared nanoparticles may be used for removal of dyes from effluent. Graphical Abstract

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“…GNP have applications in therapeutic [5], catalysis [2], immunoassay and immunosensing [6], diagnostic and drug delivery [7][8][9][10], analyte sensing [11][12][13], cancer cell diagnostics and selective photothermal therapy [14,15], photoacoustic imaging [16,17] and cancer treatment [18]. Various plant extracts have been explored for the synthesis of GNP, namely tamarind [19], Aloe vera [20], Pelargonium graveolens [21], Diopyros kaki [22], Eucalyptus camaldulensis and Pelargonium roseum [23], coriander [24], Scutellaria barbata [25], lemongrass [26], Datura metel, Carica papaya and Solanum melongena [27]. Additionally, live plants like Brassica juncea [28], Avena sativa [29], Medicago sativa [30] and Chilopsis linearis [31] have also been used for GNP synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Different plants have differential potential for metallic nanoparticle synthesis in terms of size and shape [3,22,27]. We have recently reported on the Syzygium cumini leaf extract (LE) and seed extract (SE) mediated biosynthesis of silver nanoparticles (SNP) and their characterisation [4].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of gold nanoparticles synthesised by leaf and seed extract ofSyzygium cuminiL.

Kumar

Yadav

2012

Journal of Experimental Nanoscience

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Here, Syzygium cumini leaf extract (LE) and seed extract (SE) were explored for the synthesis of gold nanoparticles (GNP). LE and SE as well as their polar (water) fractions showed potential for GNP synthesis. Comparative synthesis kinetics and morphological characterisation studies revealed the synthesis of smaller sized GNP by LE than SE. Only polar (water) fractions showed potential for GNP synthesis, which are smaller in size compared to their respective extracts. SE contained more polyphenols and biochemical constituents than LE and therefore, showed higher synthesis rate and bigger sized GNP. Atomic force microscope and scanning electron microscope analysis indicated that both extracts and their fractions catalysed the synthesis of spherical GNP. The average size of GNP synthesised by LE, leaf water fraction (LWF), SE and seed water fraction (SWF) were 24, 23, 35 and 32 nm, respectively. Fourier transform infrared analysis identified the biomolecules involved in the synthesis and stability of GNP. This study documented the potential of S. cumini for the synthesis of GNP in addition to silver nanoparticles (SNP). However, nature and types of polyphenols involved in GNP synthesis seem to be different from that involved in SNP synthesis. This might be the possible reason for smaller sized GNP that SNP.

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Qualitative assessment of silver and gold nanoparticle synthesis in various plants: a photobiological approach

Cited by 151 publications

References 33 publications

Synthesis of silver nanoparticles from stem bark of Cochlospermum religiosum (L.) Alston: an important medicinal plant and evaluation of their antimicrobial efficacy

Synthesis of silver nanoparticles from stem bark of Cochlospermum religiosum (L.) Alston: an important medicinal plant and evaluation of their antimicrobial efficacy

Photobiological synthesis of noble metal nanoparticles using Hydrocotyle asiatica and application as catalyst for the photodegradation of cationic dyes

Characterisation of gold nanoparticles synthesised by leaf and seed extract ofSyzygium cuminiL.

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