Two-dimensional (2D) semiconductor nanoplatelets (NPLs) are strongly photoluminescent {materials|supplies|components} with {interesting|fascinating|intriguing|exciting} properties for optoelectronics. {Especially|Particularly|Specifically|Specially|In particular} their narrow photoluminescence paired {with a|having a|using a} {high|higher} quantum yield are promising for light emission applications with {high|higher} {color|colour} purity. {However|Nevertheless|Nonetheless|Even so|On the other hand|Having said that}, retaining these {features|attributes|functions|characteristics|capabilities|options} in solid-state thin films {together|with each other|collectively} with an {efficient|effective} encapsulation {of the|from the|in the|on the|with the|of your} NPLs {is a|is really a|is actually a|can be a|is often a|is usually a} challenge, {especially|particularly|specifically|specially|in particular} when {trying|attempting} {to achieve|to attain} {high quality|top quality|premium quality|good quality} films with defined optical density and low surface roughness. {Here|Right here} we show photoluminescent polymer-encapsulated inorganic-organic nanocomposite coatings of 2D CdSe/CdS NPLs in poly(diallyldimethylammonium chloride) (PDDA) and poly(ethylenimine) (PEI), {which are|that are} {prepared|ready} by sequential layer-by-layer (LbL) deposition. The electrostatic interaction {between|in between|among|amongst|involving} the positively charged polyelectrolytes and aqueous phase transferred NPLs with negatively charged surface ligands is {used|utilized|employed|utilised|applied|made use of} as driving force {to achieve|to attain} self-assembled nanocomposite coatings with well-controlled layer thickness and surface roughness. {Increasing|Growing|Escalating|Rising} the repulsive forces {between|in between|among|amongst|involving} the NPLs by {increasing|growing|escalating|rising} the pH {value|worth} {of the|from the|in the|on the|with the|of your} dispersion {leads to|results in} the formation of nanocomposites with all NPLs arranging flat {on the|around the} substrate, {while|whilst|although|even though|when|though} the surface roughness {of the|from the|in the|on the|with the|of your} 165 nm (50 bilayers) thick coating decreases to Ra = 14 nm. The photoluminescence properties {of the|from the|in the|on the|with the|of your} nanocomposites are determined by the atomic layer thickness {of the|from the|in the|on the|with the|of your} NPLs {and the|and also the|as well as the|along with the|plus the} 11-mercaptoundecanoic acid ligand {used|utilized|employed|utilised|applied|made use of} for their phase transfer. {Both|Each}, the FWHM (20.{5|five} nm) {as well|also|too|at the same time} {as the|because the} position (548 nm) {of the|from the|in the|on the|with the|of your} nanocomposite photoluminescence are retained in comparison {to the|towards the|for the} colloidal CdSe/CdS NPLs in aqueous dispersion, {while|whilst|although|even though|when|though} the measured photoluminescence quantum yield of {5|five} % is competitive to state-of-the-art nanomaterial coatings. Our {approach|method|strategy} yields {stable|steady} polymer-encapsulated CdSe/CdS NPLs in smooth coatings with controllable film thickness, rendering the LbL deposition {technique|method|approach|strategy} a {powerful|potent|effective|strong|highly effective} tool for the fabrication of solid-state photoluminescent nanocomposites. 820231-27-4 Order 1805526-89-9 Order PMID:26780211
Headquartered in New Jersey, USA, ChemScence is a global leading manufacturer and supplier of building blocks and fine research chemicals. We now have branches in Sweden and India. Our mission is to pave the way for drug discovery by providing the most innovative chemicals with the highest-level quality for a reasonable price.
Our Catalog Products
We deliver an extensive portfolio of products, including Building Blocks,Catalysts&Ligands,Synthetic Reagents,Material Science and ADC Linkers&Protac,.ChemScene now have over 600000 Building Blocks & Intermediates in our catalog and more than 70000 of them are in stock.
For details, please refer to the ChemScene website:https://www.chemscene.com