Ecofriendly Route To Synthesize Nanomaterials for Biomedical Applications: Bioactive Polymers on Shape-Controlled Effects of Nanomaterials under Different Reaction Conditions

2013 ◽  
Vol 1 (11) ◽  
pp. 1417-1431 ◽  
Author(s):  
Vijender Singh ◽  
Poonam Khullar ◽  
Pragnesh N. Dave ◽  
Gurinder Kaur ◽  
Mandeep Singh Bakshi
Keyword(s):  
Biomedical Applications ◽  
Reaction Conditions ◽  
Bioactive Polymers ◽  
Shape Controlled

scholarly journals Review on the Impact of Polyols on the Properties of Bio-Based Polyesters

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2969
Author(s):  
Kening Lang ◽  
Regina J. Sánchez-Leija ◽  
Richard A. Gross ◽  
Robert J. Linhardt
Keyword(s):  
Tissue Engineering ◽  
Biomedical Applications ◽  
Molecular Level ◽  
Potential Utility ◽  
Reaction Conditions ◽  
Wide Range ◽  
Soft Tissue Engineering ◽  
The Impact ◽  
Optimal Reaction

Bio-based polyol polyesters are biodegradable elastomers having potential utility in soft tissue engineering. This class of polymers can serve a wide range of biomedical applications. Materials based on these polymers are inherently susceptible to degradation during the period of implantation. Factors that influence the physicochemical properties of polyol polyesters might be useful in achieving a balance between durability and biodegradability. The characterization of these polyol polyesters, together with recent comparative studies involving creative synthesis, mechanical testing, and degradation, have revealed many of their molecular-level differences. The impact of the polyol component on the properties of these bio-based polyesters and the optimal reaction conditions for their synthesis are only now beginning to be resolved. This review describes our current understanding of polyol polyester structural properties as well as a discussion of the more commonly used polyol monomers.

Top-down fabrication of shape-controlled, monodisperse nanoparticles for biomedical applications

2018 ◽  
Vol 132 ◽  
pp. 169-187 ◽  
Author(s):  
Xinxin Fu ◽  
Jingxuan Cai ◽  
Xiang Zhang ◽  
Wen-Di Li ◽  
Haixiong Ge ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Top Down ◽  
Monodisperse Nanoparticles ◽  
Shape Controlled

scholarly journals Sonochemical Synthesis of Silver Nanoparticles Using Starch: A Comparison

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Brajesh Kumar ◽  
Kumari Smita ◽  
Luis Cumbal ◽  
Alexis Debut ◽  
Ravinandan Nath Pathak
Keyword(s):  
Silver Nanoparticles ◽  
Electron Diffraction ◽  
Biomedical Applications ◽  
Room Temperature ◽  
Reaction Conditions ◽  
Selected Area Electron Diffraction ◽  
Novel Approach ◽  
Transmission Electron ◽  
Amorphous Nature ◽  
Ph Range

A novel approach was applied to synthesize silver nanoparticles using starch under sonication. Colloidal silver nanoparticles solution exhibited an increase of absorption from 420 to 440 nm with increase starch quantity. Transmission electron microscopy followed by selected area electron diffraction pattern analysis indicated the formation of spherical, polydispersed, amorphous, silver nanoparticles of diameter ranging from 23 to 97 nm with mean particle size of 45.6 nm. Selected area electron diffraction (SAED) confirmed partial crystalline and amorphous nature of silver nanoparticles. Silver nanoparticles synthesized in this manner can be used for synthesis of 2-aryl substituted benzimidazoles which have numerous biomedical applications. The optimized reaction conditions include 10 ml of 1 mM AgNO3, 25 mg starch, 11 pH range, and sonication for 20 min at room temperature.

An oxidative cross-coupling reaction of 4-hydroxydithiocoumarin and amines/thiols using a combination of I2 and TBHP: access to lead molecules for biomedical applications

2018 ◽  
Vol 54 (12) ◽  
pp. 1513-1516 ◽  
Author(s):  
Karuna Mahato ◽  
Neha Arora ◽  
Prasanta Ray Bagdi ◽  
Radhakrishna Gattu ◽  
Siddhartha Sankar Ghosh ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
Metal Free ◽  
Cross Coupling Reaction

Environmentally benign mild reaction conditions for the construction of new S–N/S–C/S–S bonds under metal free conditions.

scholarly journals Palladium Nanoparticles Fabricated by Green Chemistry: Promising Chemotherapeutic, Antioxidant and Antimicrobial Agents

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3661 ◽  
Author(s):  
Sherif Fahmy ◽  
Eduard Preis ◽  
Udo Bakowsky ◽  
Hassan Mohamed Azzazy
Keyword(s):  
Green Chemistry ◽  
Physicochemical Properties ◽  
Plant Extracts ◽  
Palladium Nanoparticles ◽  
Biomedical Applications ◽  
Antimicrobial Agents ◽  
Reaction Conditions ◽  
Chemical Methods ◽  
Physical And Chemical

Palladium nanoparticles (Pd NPs) showed great potential in biomedical applications because of their unique physicochemical properties. Various conventional physical and chemical methods have been used for the synthesis of Pd NPs. However, these methods include the use of hazardous reagents and reaction conditions, which may be toxic to health and to the environment. Thus, eco-friendly, rapid, and economic approaches for the synthesis of Pd NPs have been developed. Bacteria, fungi, yeast, seaweeds, plants, and plant extracts were used to prepare Pd NPs. This review highlights the most recent studies for the biosynthesis of Pd NPs, factors controlling their synthesis, and their potential biomedical applications.

Shape-Controlled Synthesis of Ag Nanocubes with Uniform Size

2014 ◽  
Vol 1004-1005 ◽  
pp. 37-41
Author(s):  
Yu Xia Zhao ◽  
Cheng Mei Liu ◽  
Lu Han ◽  
Yen Wei
Keyword(s):  
Edge Length ◽  
Polyol Synthesis ◽  
Controlled Synthesis ◽  
Controllable Synthesis ◽  
Reaction Conditions ◽  
Uniform Size ◽  
Silver Nanocubes ◽  
Shape Controlled ◽  
Shape Of Nanoparticles ◽  
Sharp Corners

The controllable synthesis of special shape of nanoparticles with uniform size was most important for some special applications. In this work, we prepared silver nanocubes by Na2S-mediated polyol synthesis using AgNO3 as precursor, polyvinyl pyrrolidine(PVP) as capping agent and ethylene glycol(EG) as solvent and reductant under the protection of Ar characterized by SEM, UV-vis, DLS and Zeta potential. Silver nanocubes were successfully controllably obtained via optimizing the reaction conditions, such as the rate of Ar initially after 50 min pre-heating and subsequently after the addition of AgNO3 solution，the volume of 3 mM Na2S solution. The results showed that silver nanocubes with edge length of 50 nm and sharp corners were achieved at 230μL 3mM Na2S solution added under a Ar rate of 1000 ml/min.

Horseradish peroxidase-catalyzed hydrogelation for biomedical applications

2018 ◽  
Vol 6 (6) ◽  
pp. 1286-1298 ◽  
Author(s):  
Mehdi Khanmohammadi ◽  
Mahsa Borzouyan Dastjerdi ◽  
Arman Ai ◽  
Akbar Ahmadi ◽  
Arash Godarzi ◽  
...  
Keyword(s):  
Horseradish Peroxidase ◽  
Biomedical Applications ◽  
Water Soluble ◽  
Biocompatible Polymers ◽  
Reaction Conditions ◽  
Physiological Conditions ◽  
Gelation Rate

Hydrogels catalyzed by horseradish peroxidase (HRP) serve as an efficient and effective platform for biomedical applications due to their mild reaction conditions for cells, fast and adjustable gelation rate in physiological conditions, and an abundance of substrates as water-soluble biocompatible polymers.

A General Approach to Synthesize Metal Nanostructures by Using Cucurbit[7]uril

NANO ◽  
2018 ◽  
Vol 13 (01) ◽  
pp. 1850007 ◽  
Author(s):  
Sun Gu Song ◽  
Thathan Premkumar ◽  
Changsik Song
Keyword(s):  
Biomedical Applications ◽  
Environmental Influence ◽  
Metal Nanostructures ◽  
Ambient Conditions ◽  
External Energy ◽  
Reaction Conditions ◽  
Experimental Conditions ◽  
One Pot ◽  
Green Approach ◽  
Copper Zinc

Various metal (iron, copper, zinc, platinum)-based nanostructures were synthesized by a simple, green, and one-pot reaction of respective metal precursor and a cucurbit[7]uril (CB7) in an aqueous alkaline mixture at room temperature. The metal nanostructures (MNS) were obtained without adding any additional traditional reducing or protecting agents and/or external energy sources. Further, we could be able to tune the size and shape of the MNS just by varying the experimental conditions such as reaction concentration. Depending on the metal salts and reaction conditions, we could be able to produce different sizes and shapes of nanostructures. For example, the diameter of the CuO and iron nanoparticles (NP) was observed as [Formula: see text][Formula: see text]nm (even [Formula: see text][Formula: see text]nm) which suggests the inclusion mechanism. However, the particle size of zinc and platinum was over 2[Formula: see text]nm which suggests the capping mechanism for the well-dispersed nanoparticles. It is worth mentioning that the CB7 acts as both reducing and protecting agent for the preparation of various MNS at ambient conditions. This one-pot and green approach for the preparation of MNS in aqueous solution has various advantages due to its mild synthesis condition and no toxic materials were used or produced, which is an important aspect for the exploration of biomedical applications and environmental influence of several metal nanoparticles that are presently prepared in organic solvents.

scholarly journals Straightforward and robust synthesis of monodisperse surface-functionalized gold nanoclusters

2016 ◽  
Vol 7 ◽  
pp. 1278-1283 ◽  
Author(s):  
Silvia Varela-Aramburu ◽  
Richard Wirth ◽  
Chian-Hui Lai ◽  
Guillermo Orts-Gil ◽  
Peter H Seeberger
Keyword(s):  
Drug Delivery ◽  
Biomedical Applications ◽  
Room Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Gold Nanoclusters ◽  
Reaction Conditions ◽  
One Pot ◽  
Small Surface ◽  
Stabilizing Agent

Gold nanoclusters are small (1–3 nm) nanoparticles with a high surface area that are useful for biomedical studies and drug delivery. The synthesis of small, surface-functionalized gold nanoclusters is greatly dependent on the reaction conditions. Here, we describe a straightforward, efficient and robust room temperature one-pot synthesis of 2 nm gold nanoclusters using thioglucose as a reducing and stabilizing agent, which was discovered by serendipity. The resultant monodisperse gold nanoclusters are more stable than those generated using some other common methods. The carboxylic acid contained in the stabilizing agent on the cluster surface serves as anchor for nanocluster functionalization. Alternatively, the addition of thiols serves to functionalize the nanoclusters. The resulting non-cytotoxic nanoclusters are taken up by cells and constitute a tuneable platform for biomedical applications including drug delivery.

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