Formation of silver nanoparticles (AgNPs) by a biological route employing Crossandra infundibuliformis leaf extract has been investigated. The silver nanoparticles were formed in 1 h by stirring at room temperature. In this case, yellowish brown color was developed. Formation of AgNP was confirmed by surface plasmon spectra and absorbance peaks at 457 nm. Crystalline nature of the nanoparticle was face centered cubic (fcc) structure. The AgNPs formed were flake-like in shape and the average particle size was about 38 nm. © 2011 Elsevier B.V. All rights reserved.

Somasundaram Kaviya

Balasubramanian Viswanathan

ABSORBANCE PEAK

Average particle size

BIOLOGICAL ROUTE

BROWN COLOR

CROSSANDRA INFUNDIBULIFORMIS

Crystalline nature

FACE CENTERED CUBIC STRUCTURE

LEAF EXTRACTS

Nanoflakes

Room temperature

Silver nanoparticles

Surface plasmons

Biochemistry

Biosynthesis

Nanoparticles

Silver

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Materials Letters

This chapter describes the potential of various shapes of gold nanomaterials such as nanoparticles, nanorods, nanostars, nanocages, and nanoshells in cancer nanotheranostics, i.e., both as diagnostic and therapeutic agent. This study includes the synthesis of different gold nanomaterials using several methods like chemical-, green-, and microbial-mediated synthesis. The ability of gold nanomaterials to absorb light in the near-infrared region and transform it into heat and their unique optical properties make them a promising tool in photothermal cancer therapy. Herein, we present the recent advances and the ability of gold nanomaterials to show its multiple roles in the field of cancer biology. © 2017 Elsevier Inc. All rights reserved.

Advances in Biomembranes and Lipid Self-Assembly

Gold nanomaterials: Recent advances in cancer theranostics

Biosynthesis of silver nano-flakes by Crossandra infundibuliformis leaf extract

The current research study focuses on biosynthesis of silver nanoparticles (Ag NPs) for the first time from silver acetate employing methanolic root extract of Diospyros assimilis. The UV–Vis absorption spectrum of biologically synthesised nanoparticles displayed a surface plasmon peak at 428 nm indicating the formation of Ag NPs. The influence of metal ion concentration, reaction time and amount of root extract in forming Ag NPs by microscopic and spectral analysis was thoroughly investigated. Structural analysis from transmission electron microscopy confirmed the nature of metallic silver as face-centered cubic (FCC) crystalline with an average diameter of 17 nm, which correlates with an average crystallite size (19 nm) calculated from X-ray diffraction analysis. Further, the work was extended for the preliminary examination of antimicrobial activity of biologically synthesised Ag NPs that displayed promising activity against all the tested pathogenic strains. © The Institution of Engineering and Technology 2017.

IET Nanobiotechnology

Diospyros assimilis root extract assisted biosynthesised silver nanoparticles and their evaluation of antimicrobial activity

Chemico-Biological Interactions

Mechanism of plant-mediated synthesis of silver nanoparticles – A review on biomolecules involved, characterisation and antibacterial activity

Integration of green chemistry principles to nanotechnology is one of the key issues in nanoscience research. Biological methods were used to synthesize metal and metal oxide nanoparticles of specific shape and size since they enhance the properties of nanoparticles in greener route. Plant-mediated methods devoid the use of toxic chemicals in the synthetic protocols which has adverse effects on the environment. Owing to the rich biodiversity of plants and their potential secondary constituents, plants and plant parts have gained attention in recent years as medium for nanoparticles' synthesis. In this review, we present the current status of nanoparticles synthesis using devastated crops.

Fulltext

Journal of Nanomaterials

Devastated Crops: Multifunctional Efficacy for the Production of Nanoparticles

Plasma Chemistry and Plasma Processing

Carbon Nano-Flakes Produced by an Inductively Coupled Thermal Plasma System for Catalyst Applications

Journal of Materials Chemistry

Hierarchical self-assembly of ultrathin nickel hydroxide nanoflakes for high-performance supercapacitors

Colloids and Surfaces B: Biointerfaces

Bioprospective of Sorbus aucuparia leaf extract in development of silver and gold nanocolloids

Process Biochemistry

Tansy fruit mediated greener synthesis of silver and gold nanoparticles

Journal	Materials Letters
ISSN	0167577X
Open Access	No