Changes in Optical Properties upon Dye–Clay Interaction: Experimental Evaluation and Applications

The development of hybrid materials with unique optical properties has been a challenge for the creation of high-performance composites. The improved photophysical and photochemical properties observed when fluorophores interact with clay minerals, as well as the accessibility and easy handling of such natural materials, make these nanocomposites attractive for designing novel optical hybrid materials. Here, we present a method of promoting this interaction by conjugating dyes with chitosan. The fluorescent properties of conjugated dye–montmorillonite (MMT) hybrids were similar to those of free dye–MMT hybrids. Moreover, we analyzed the relationship between the changes in optical properties of the dye interacting with clay and its structure and defined the physical and chemical mechanisms that take place upon dye–MMT interactions leading to the optical changes. Conjugation to chitosan additionally ensures stable adsorption on clay nanoplatelets due to the strong electrostatic interaction between chitosan and clay. This work thus provides a method to facilitate the design of solid-state hybrid nanomaterials relevant for potential applications in bioimaging, sensing and optical purposes.

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Functionalization of polyethetherketone for application in dentistry and orthopedics

BioNanoMaterials ◽

10.1515/bnm-2017-0003 ◽

2017 ◽

Vol 18 (1-2) ◽

Cited By ~ 1

Author(s):

Rico Harting ◽

Marius Barth ◽

Thomas Bührke ◽

Regina Sophia Pfefferle ◽

Svea Petersen

Keyword(s):

Drug Delivery ◽

Surface Modification ◽

High Performance ◽

Drug Delivery Systems ◽

Metal Implant ◽

High Performance Polymer ◽

Potential Applications ◽

Physical And Chemical ◽

Very High ◽

Huge Challenge

AbstractSince late 1990s, polyetheretherketone (PEEK) has presented a promising polymeric alternative to metal implant components, particularly in orthopedic and traumatic applications. However, PEEK is biologically inert, which has constrained its potential applications. In this manner, enhancing the bioactivity of PEEK is a huge challenge that must be comprehended to completely understand the potential advantages. Up to now, two noteworthy methodologies are discussed to enhance the bioactivity of PEEK, including bulk and surface modification. Although the latter is extremely challenging due to the very high physical and chemical stability of the high performance polymer, there are some stated modification reactions in the literature, which will be collocated with in the literature-reported PEEK composites in the present article. We will furthermore add information on polymer-based drug delivery systems and the biofunctionalization of polymers in general and discuss their applicability for PEEK, as we estimate that these strategies will gain greater attention in the future. At the end of the article, our own research on the development of a PEEK-associated biodegradable drug-delivery system with potential application in dentistry or orthopedics will be highlighted.

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Large-size and high performance visible-light photodetectors based on two-dimensional hybrid materials SnS/RGO

RSC Advances ◽

10.1039/c7ra11269f ◽

2018 ◽

Vol 8 (2) ◽

pp. 761-766 ◽

Cited By ~ 10

Author(s):

Renfu Zhuo ◽

Shiyong Zuo ◽

Weiwei Quan ◽

De Yan ◽

Baisong Geng ◽

...

Keyword(s):

Visible Light ◽

Hybrid Materials ◽

High Performance ◽

Solvothermal Method ◽

Two Dimensional ◽

Large Size ◽

Potential Applications ◽

Facile Solvothermal Method

We report a facile solvothermal method to synthesize hybrid materials SnS/RGO which are promising candidates for potential applications in photodetectors.

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Stabilization of ZnS nanoparticles by polymeric matrices: syntheses, optical properties and recent applications

RSC Advances ◽

10.1039/c6ra13108e ◽

2016 ◽

Vol 6 (69) ◽

pp. 64400-64420 ◽

Cited By ~ 35

Author(s):

Ashish Tiwari ◽

S. J. Dhoble

Keyword(s):

Optical Properties ◽

Electronic Properties ◽

Hybrid Materials ◽

Optical Studies ◽

Zns Nanoparticles ◽

Polymeric Matrices ◽

Optical And Electronic Properties ◽

Potential Applications ◽

Promising Area

ZnS nanocomposites is a promising area of research for designing novel functional hybrid materials due to their unique optical and electronic properties. This review emphasizes on the synthesis, optical studies and potential applications.

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Synthesis, structure and piezo-/ferroelectric properties of a novel bismuth-containing ternary complex perovskite solid solution

Journal of Materials Chemistry C ◽

10.1039/c7tc00571g ◽

2017 ◽

Vol 5 (16) ◽

pp. 3916-3923 ◽

Cited By ~ 22

Author(s):

Zenghui Liu ◽

Alisa R. Paterson ◽

Hua Wu ◽

Pan Gao ◽

Wei Ren ◽

...

Keyword(s):

Solid Solution ◽

Solid State ◽

Solid State Reaction ◽

High Performance ◽

Ternary Complex ◽

Ferroelectric Properties ◽

Ternary Solid Solution ◽

Complex Perovskite ◽

Chemical Mechanisms ◽

Physical And Chemical

A novel ternary solid solution has been synthesized by solid state reaction in the form of ceramics with compositions across the morphotropic phase boundary (MPB). It exhibits high-performance piezo-/ferroelectric properties whose underlying physical and chemical mechanisms are investigated.

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Physical mechanisms involved in the formation and operation of memory devices based on a monolayer of gold nanoparticle-polythiophene hybrid materials

Nanoscale Advances ◽

10.1039/c9na00285e ◽

2019 ◽

Vol 1 (7) ◽

pp. 2718-2726

Author(s):

T. Zhang ◽

D. Guérin ◽

F. Alibart ◽

D. Troadec ◽

D. Hourlier ◽

...

Keyword(s):

Gold Nanoparticle ◽

Hybrid Materials ◽

Memory Device ◽

Memory Devices ◽

Resistive Memory ◽

Forming Process ◽

Chemical Mechanisms ◽

Physical Mechanisms ◽

Physical And Chemical

Understanding the physical and chemical mechanisms occurring during the forming process and operation of an organic resistive memory device is a requisite for better performance.

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Mechanism to Detect Pesticide Residues in Tealeaves Based on CdZnSe/ZnS Ternary Alloy Quantum Dots

Communications in Physics ◽

10.15625/0868-3166/25/1/5601 ◽

2015 ◽

Vol 25 (1) ◽

pp. 67

Author(s):

Nguyen Ngọc Hai ◽

Nguyen Hai Yen ◽

Duong Thi Giang ◽

Dinh Hung Cuong ◽

Nguyen Duc Nhat ◽

...

Keyword(s):

Quantum Dots ◽

Optical Properties ◽

Ternary Alloy ◽

Luminescence Intensity ◽

Ph Value ◽

Before And After ◽

Potential Applications ◽

Composition Structure ◽

Alloy Quantum Dots ◽

The Relationship

In this report, we present the optical properties of the biosensors fabricated from CdZnSe/ZnS quantum dots. The optical properties such as absorption and emission of the ternary quantum dots before and after coupling with the protein molecules like streptavidine (SA) and acetylcholinesterase enzymes (AChE), to form a biosensor structure, will be presented. In particular, the changes in luminescence intensity according to the pH value of the solution environment containing biosensor have been considered, before and after the presence of pesticides. The changes in luminescence intensity of the biosensor after the presence of pesticide over time from 2 seconds to 26 minutes were also surveyed. We have been carried out the tests to determine the trace amounts of commercial pesticides like Motox 5EC, containing 5% cypermethrin and Tungatin 10 EC, containing 10% abamectin, on the real samples of tealeaves. Some characteristics of the relationship between composition, structure, and special optical properties of ternary alloy quantum dots will also be presented. These studies open up the potential applications of ternary quantum dots for agricultural production.

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Intrinsic hydroquinone-functionalized aggregation-induced emission core shows redox and pH sensitivity

Communications Chemistry ◽

10.1038/s42004-021-00492-4 ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Mengshi Wang ◽

Yuanheng Wang ◽

Renjian Hu ◽

Jinying Yuan ◽

Mei Tian ◽

...

Keyword(s):

Ph Value ◽

Solution Concentration ◽

Rapid Quenching ◽

Fluorescent Properties ◽

Redox Probe ◽

Aggregation Induced Emission ◽

Potential Applications ◽

Photochemical Properties ◽

Emission Core ◽

Nonlinear Fashion

AbstractAggregation-induced emission (AIE) fluorophores exhibit strong fluorescence in an aggregated state but emit no or weak fluorescence in dilute solutions. This emerging class of AIE optical materials comprise a variety of functionalities. Here an AIE luminescence core, 1-hydroquinol-1,2,2-triphenylethene (HQTPE), has been designed and synthesized. This AIE core is simple but is fundamentally important to chemistry because of its intrinsic redox and pH activities. The incorporation of hydroquinone (HQ) moiety into a common AIE core tetraphenylethene (TPE) yields HQTPE with unique fluorescent properties like nonlinear self-quenching over most other AIE-active fluorophores (AIEgens) so far reported. There are differences of photochemical properties between HQTPE, 1-benzoquinol-1,2,2-triphenylethene (QTPE, the oxidized counterpart) and its anions. Interestingly, as the solution concentration is increased, AIEgen HQTPE shows stronger fluorescence but QTPE exhibits rapid quenching of fluorescence in a nonlinear fashion, which are in agreement with theoretical studies. The fluorescence of HQTPE is also highly dependent on the pH value of media. We have further explored HQTPE as an ultrasensitive redox probe and efficient deoxidizer, which could lead to potential applications in health care, food security, environmental monitoring, optic and electronic devices.

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Radiation-induced surface decomposition

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100075592 ◽

1983 ◽

Vol 41 ◽

pp. 368-369

Author(s):

M. L. Knotek

Keyword(s):

Ionizing Radiation ◽

Atomic Structure ◽

Chemical Bonding ◽

Neutral Species ◽

Radiation Induced ◽

Physical And Chemical ◽

Surface Decomposition ◽

The Relationship ◽

Electron And Photon ◽

Surface Bond

Modern surface analysis is based largely upon the use of ionizing radiation to probe the electronic and atomic structure of the surfaces physical and chemical makeup. In many of these studies the ionizing radiation used as the primary probe is found to induce changes in the structure and makeup of the surface, especially when electrons are employed. A number of techniques employ the phenomenon of radiation induced desorption as a means of probing the nature of the surface bond. These include Electron- and Photon-Stimulated Desorption (ESD and PSD) which measure desorbed ionic and neutral species as they leave the surface after the surface has been excited by some incident ionizing particle. There has recently been a great deal of activity in determining the relationship between the nature of chemical bonding and its susceptibility to radiation damage.

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What Can Digitization Do For Formulated Product Innovation and Development

10.26434/chemrxiv.11763864.v1 ◽

2020 ◽

Author(s):

James McDonagh ◽

William Swope ◽

Richard L. Anderson ◽

Michael Johnston ◽

David J. Bray

Keyword(s):

High Performance ◽

Quality Data ◽

High Quality Data ◽

Base Level ◽

Hybrid Approaches ◽

Digital Ecosystem ◽

Recent Developments ◽

Chemical Simulation ◽

High Level ◽

Physical And Chemical

Digitization oﬀers signiﬁcant opportunities for the formulated product industry to transform the way it works and develop new methods of business. R&D is one area of operation that is challenging to take advantage of these technologies due to its high level of domain specialisation and creativity but the beneﬁts could be signiﬁcant. Recent developments of base level technologies such as artiﬁcial intelligence (AI)/machine learning (ML), robotics and high performance computing (HPC), to name a few, present disruptive and transformative technologies which could oﬀer new insights, discovery methods and enhanced chemical control when combined in a digital ecosystem of connectivity, distributive services and decentralisation. At the fundamental level, research in these technologies has shown that new physical and chemical insights can be gained, which in turn can augment experimental R&D approaches through physics-based chemical simulation, data driven models and hybrid approaches. In all of these cases, high quality data is required to build and validate models in addition to the skills and expertise to exploit such methods. In this article we give an overview of some of the digital technology demonstrators we have developed for formulated product R&D. We discuss the challenges in building and deploying these demonstrators.<br>

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