Keyword search (4,163 papers available)

"Kumar R" Authored Publications:

Title Authors PubMed ID
1 Developing and Sustaining Dementia Capable Communities: An Analysis of the Current Evidence Biglieri S; Ahmed N; Main S; Tupling OL; Vijayakumar R; Boger J; Daum C; Dupuis S; Koch M; Liu L; Lopez K; Mann J; Martin M; McAiney C; Nasir HJ; Nasir N; Pearce B; Weldrick R; Vanderlinden K; Middleton L; 41432943
ENCS
2 Interrogation of Bacillus anthracis SrtA active site loop forming open/close lid conformations through extensive MD simulations for understanding binding selectivity of SrtA inhibitors Selvaraj C; Selvaraj G; Mohamed Ismail R; Vijayakumar R; Baazeem A; Wei DQ; Singh SK; 34220215
BIOLOGY
3 Characterization of Phase I and Glucuronide Phase II Metabolites of 17 Mycotoxins Using Liquid Chromatography-High-Resolution Mass Spectrometry Slobodchikova I; Sivakumar R; Rahman MS; Vuckovic D; 31344861
CBAMS
4 Tuning of Morphology and Stability of Gold Nanostars Through pH Adjustment. Kumar R, Badilescu S, Packirisamy M 30913757
ENCS
5 Directing the Viedma ripening of ethylenediammonium sulfate using "Tailor-made" chiral additives. Nguyen TP, Cheung PS, Werber L, Gagnon J, Sivakumar R, Lennox C, Sossin A, Mastai Y, Cuccia LA 27722259
CHEMBIOCHEM

 

Title:Tuning of Morphology and Stability of Gold Nanostars Through pH Adjustment.
Authors:Kumar R,  Badilescu S,  Packirisamy M
Link:https://www.ncbi.nlm.nih.gov/pubmed/30913757?dopt=Abstract
Publication:
Keywords:
PMID:30913757 Category:J Nanosci Nanotechnol Date Added:2019-06-04
Dept Affiliation: ENCS
1 Optical-Bio Micro Systems Laboratory, Mechanical, Industrial and Aerospace Engineering Department, Concordia University, 1455 De Maisonneuve Blvd. W. Montréal, QC, H3G1M8, Canada.

Description:

Tuning of Morphology and Stability of Gold Nanostars Through pH Adjustment.

J Nanosci Nanotechnol. 2019 Aug 01;19(8):4617-4622

Authors: Kumar R, Badilescu S, Packirisamy M

Abstract

In this study, the morphology and stability of gold nanostars (AuNSs) were investigated under different pH environments. The surface morphologies and plasmonic properties were observed for nanostars (NSs) deposited on glass substrates, using SEM and ultraviolet and visible (UV-Vis) spectroscopy. It is found that gold nanostars can be readily stabilized just by adjusting the initial pH condition of the growth solution. The particle size distribution of gold nanostars under different pH environments has been investigated using UV-Vis spectroscopy and found to be highly dependent on pH. At the optimal pH of 11, the gold nanostars are highly monodisperse, they have longer branches and the Au Localized Surface Plasmon Resonance band (LSPR) at 720 nm. For other pH conditions, particles are non-uniform and polydisperse, showing a red-shift of the plasmon peak due to aggregation and a large particle size distribution. Time-dependent UV-Vis spectra studies hypothesize the pH dependent stabilization mechanism, where the formation and stabilization of AuNS were affected greatly by the aggregation induced by pH of the growth solution. The information obtained in this study can be used to design stable gold nanostars with longer shelf life for biosensing applications.

PMID: 30913757 [PubMed - in process]




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