Journal ArticleDOI
Screening of different algae for green synthesis of gold nanoparticles
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TLDR
Production of gold nanoparticles by algae is more ecofriendly than purely chemical synthesis, however, the choice of algae is important: Chara zeylanica and Pithophora oedogoniana were found to be unable to produce nanoparticles.Abstract:
The cyanobacteria Phormidium valderianum, P. tenue and Microcoleus chthonoplastes and the green algae Rhizoclonium fontinale, Ulva intestinalis, Chara zeylanica and Pithophora oedogoniana were exposed to hydrogen tetrachloroaurate solution and were screened for their suitability for producing nano‐gold. All three cyanobacteria genera and two of the green algae (Rhizoclonium fontinale and Ulva intestinalis) produced gold nanoparticles intracellularly, confirmed by purple colouration of the thallus within 72 h of treatment at 20°C. Extracted nanoparticle solutions were examined by UV‐vis spectroscopy, transmission electron microscopy (TEM) and X‐ray diffractometry (XRD). XRD confirmed the reduction of Au (III) to Au (0). UV‐vis spectroscopy and TEM studies indicated the production of nanoparticles having different shapes and sizes. Phormidium valderianum synthesized mostly spherical nanoparticles, along with hexagonal and triangular nanoparticles, at basic and neutral pHs (pH 9 and pH 7, respectively). Medi...read more
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Journal ArticleDOI
Screening of cyanobacteria and microalgae for their ability to synthesize silver nanoparticles with antibacterial activity.
TL;DR: Silver nanoparticles formed in most of the cases were formed both in the presence of biomass as well as in the cell-free culture liquid, which indicates that the process of Ag-NPs formation involves an extracellular compound such as polysaccharide.
Journal ArticleDOI
Biological synthesis of metallic nanoparticles: plants, animals and microbial aspects
Ratul Kumar Das,Ratul Kumar Das,Vinayak Laxman Pachapur,Linson Lonappan,Mitra Naghdi,Rama Pulicharla,Sampa Maiti,Maximiliano Cledón,Maximiliano Cledón,Larios Martinez Araceli Dalila,Saurabh Jyoti Sarma,Satinder Kaur Brar +11 more
TL;DR: This review encompasses the recent advances in the GS of MNPs using plants, animals and microorganisms and analyzes the key points and further discusses the pros and cons of GS in respect of chemical synthesis.
Journal ArticleDOI
Algae-based metallic nanoparticles: Synthesis, characterization and applications.
TL;DR: The present paper reviews the information available on algae-mediated biosynthesis of various NPs, their characterization and applications in different domains and concludes that algae are an appealing platform for the production of diverse NMs.
Journal ArticleDOI
A repertoire of biomedical applications of noble metal nanoparticles
Mohammad Azharuddin,Geyunjian Harry Zhu,Debapratim Das,Erdoğan Özgür,Lokman Uzun,Anthony Turner,Hirak K. Patra,Hirak K. Patra +7 more
TL;DR: Recent advances in the adaptation of noble metal nanomaterials and their biomedical applications in therapeutics, diagnostics and sensing are highlighted.
Journal ArticleDOI
A Review on the Synthesis and Functionalization of Gold Nanoparticles as a Drug Delivery Vehicle.
Sundus Jabeen Amina,Bin Guo +1 more
TL;DR: This review focuses on recent advances in various methods of synthesis of gold nanoparticles and strategies of functionalization and mechanisms of application of AuNPs in drug and bio-macromolecule delivery and release of payloads at target site are comprehensively discussed.
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Surface Plasmon Spectroscopy of Nanosized Metal Particles
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Journal ArticleDOI
The use of microorganisms for the formation of metal nanoparticles and their application
Deendayal Mandal,Mark E. Bolander,Debabrata Mukhopadhyay,Gobinda Sarkar,Priyabrata Mukherjee +4 more
TL;DR: This review describes a brief overview of the current research worldwide on the use of microorganisms in the biosynthesis of metal nanoparticles and their applications.