A5063731958- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Block Copolymer Self-Assembly
- Plasmonic and Surface Plasmon Research
- Nanoparticle-Based Drug Delivery
- Polymer Surface Interaction Studies
- Pickering emulsions and particle stabilization
- Identification and Quantification in Food
- 3D Printing in Biomedical Research
- Extracellular vesicles in disease
- Surface Modification and Superhydrophobicity
- Surfactants and Colloidal Systems
- Dyeing and Modifying Textile Fibers
- Advancements in Transdermal Drug Delivery
- Nonlinear Optical Materials Studies
- Nanoparticles: synthesis and applications
- Nanomaterials for catalytic reactions
- Silicone and Siloxane Chemistry
- Nanoplatforms for cancer theranostics
- S100 Proteins and Annexins
- Nanocomposite Films for Food Packaging
- Biosensors and Analytical Detection
- Advanced Cellulose Research Studies
- Advanced Polymer Synthesis and Characterization
- Electrochemical Analysis and Applications
Université de Montréal
2013-2024
University of Chinese Academy of Sciences
2024
Southern Medical University
2022-2024
Regroupement Québécois sur les Matériaux de Pointe
2022
University of Toronto
2020
Toronto Public Health
2020
Dense arrays of well-dispersed gold nanoparticles (AuNPs) on optical fibers are shown to bridge the gap in sensitivity and sensing performance between localized surface plasmon resonance (LSPR) classical SPR sensing. A simple self-assembly method relying a poly(styrene- b-4-vinylpyridine) (PS- b-P4VP) block copolymer brush layer was used immobilize AuNPs different diameters from 10 92 nm fibers. In comparison with standard AuNP deposition methods using (3-aminopropyl)trimethoxysilane (APTMS)...
A nanothin block copolymer (BCP) brush-layer film adsorbed on glass nanofibers is shown to address the long-standing challenge of forming a template for deposition dense and well-dispersed nanoparticles highly curved surfaces, allowing development an improved nanosensor neurotransmitters. We employed polystyrene- block-poly(4-vinylpyridine) BCP plasmonic gold (AuNPs) 52 nm in diameter fabrication pulled fibers with diameters down 200 nm. The method simple, using only solution processes...
A crystalline-coil block copolymer with an amphiphilic corona-forming affords a variety of different 2D structures in self-assembly media.
Well-dispersed and dense layers of gold nanorods (AuNRs) on optical fibers are shown to regulate the longitudinal peak wavelength enhance sensing performances localized surface plasmon resonance (LSPR) biosensors. A simple self-assembly method relying a brush-like monolayer poly(styrene)-b-poly(acrylic acid) (PS-b-PAA) diblock copolymer was used immobilize AuNRs with various aspect ratios from 2.33 4.60 fibers. Both experimental simulation results illustrated that particle ratio, deposition...
Colloidal stability of nanoparticles (NPs) strongly influences their synthesis, processing, and applications. For gold NPs stabilized with cetyl trimethylammonium bromide (CTAB) polymer ligands we show that gradual increase in polarity the water/aprotic solvent mixture leads to stabilization-aggregation-stabilization-aggregation transitions. We propose these transitions are mediated by structural rearrangements CTAB layer on NP surface.
Two-dimensional arrays of nanoparticles (NPs) have widespread applications in optical coatings, plasmonic sensors, and nanocomposites. Current bottom-up approaches that use homogeneous NP templates, such as silane self-assembled monolayers or homopolymers, are typically plagued by aggregation, whereas patterned block copolymer (BCP) films require specific compositions for distributions. Here, we show, using polystyrene- b-poly(4-vinylpyridine) (PS- b-P4VP) gold NPs (AuNPs) various sizes, a...
Surface enhanced Raman spectroscopy (SERS)-based nanosensors that offer high spatial and temporal resolution as well sensitivity are promising for cell endoscopy studies. This requires fabricating glass nanofibers with a dense but well-dispersed monolayer array of gold nanoparticles (AuNPs), which is challenge on the highly curved nanofiber surface. We showed previously this can be achieved dip-coated block copolymer (BCP) templates, hypothesized to brushlike. Here, we demonstrate, using...
Gold nanoparticle (AuNP) monolayers possess unique optical properties and are widely used in devices biosensors, sometimes necessitating dense but nonclose-packed monolayers. Current self-assembly methods generally limited to small surfaces often plagued by AuNP aggregation. Here, we use a facile method, suitable for substrates of any size or form, produce dense, unaggregated, randomly packed on brushlike films polystyrene-block-poly(4-vinylpyridine) (PS-P4VP) obtained dip-coating flat from...
2D nanoplasmonic substrates excited in transmission spectroscopy are ideal for several biosensing, metamaterial, and optical applications. We show that their excellent properties can be further improved with plasmonic coupling of Au nanoparticles (AuNPs) on gold-coated nanodisk arrays at large incidence angles up to 50°. The Bragg modes (BM) thereby strongly couple AuNP immobilized the substrate due shorter decay length plasmon higher angles, leading a enhanced field between substrate. was...
We report the crowding of Au nanoparticles (Au NPs) on a surface-enhanced Raman scattering (SERS) 2D array substrate with high nanoparticle surface coverage in combined approach for identification cyanobacteria machine learning. By simply using screening effect NaCl, PEG to overcome repulsion between nanoparticles, and different dithiol chain lengths during deposition process NPs substrate, we provide general increase density films over nanodisk-array SERS substrates. The optimized was...
Abstract Bimetallic core-shell nanoparticles have emerged as a more economical and versatile platform that find applications in wide range of fields such biosensing, catalyst, biomedicine. However, their synthesis by the popular seed-mediated growth method suffers from contamination secondary seeds heterogeneous nucleation and, thus, often requires combinational use stabilizing agents stringent kinetic control. Here, we report seed-induced for exclusively Au-Ag nanoparticles, where Ag +...
Dissolution of absorbent cotton (DP above 4000) using ionic liquids as solvent and regeneration was investigated. The results show that 1-ally-3-methylimidazolium chloride (AMIMCl) a good to dissolve solution 3 wt% can be reached in 18 min at 120°C. Besides, the dissolving temperature increased time needed for linters decreased. physic-chemical properties regenerated cellulose films were also characterized by XRD, FTIR TGA analysis.
Plasmonic substrates on a solid support are ideally suited for several biosensing applications. The properties of nanohole arrays and nanoparticle will be demonstrated SPR sensing surface enhanced spectroscopies (fluorescence Raman).