scholarly journals Functional Materials for Microsystems: Smart Self-Assembled Photochromic Films: Final Report

2001 ◽  
Author(s):  
ALAN R BURNS ◽  
DARRYL Y SASAKI ◽  
R W CARPICK ◽  
JOHN A SHELNUTT ◽  
C JEFFREY BRINKER
Keyword(s):  
Functional Materials ◽  
Final Report ◽  
Self Assembled

Functionalised tetrathiafulvalene- (TTF-) macrocycles: recent trends in applied supramolecular chemistry

2018 ◽  
Vol 47 (15) ◽  
pp. 5614-5645 ◽  
Author(s):  
Atanu Jana ◽  
Steffen Bähring ◽  
Masatoshi Ishida ◽  
Sébastien Goeb ◽  
David Canevet ◽  
...  
Keyword(s):  
Supramolecular Chemistry ◽  
Functional Materials ◽  
Recent Trends ◽  
Self Assembled

Tetrathiafulvalene- (TTF-) based macrocyclic systems, cages and supramolecularly self-assembled 3D constructs have been extensively explored as functional materials for sensing and switching applications.

scholarly journals Nanostructured Luminescent Micelles: Efficient “Functional Materials” for Sensing Nitroaromatic and Nitramine Explosives

Photochem ◽  
2022 ◽  
Vol 2 (1) ◽  
pp. 32-57
Author(s):  
Shashikana Paria ◽  
Prasenjit Maity ◽  
Rafia Siddiqui ◽  
Ranjan Patra ◽  
Shubhra Bikash Maity ◽  
...  
Keyword(s):  
Drug Delivery ◽  
State Of The Art ◽  
Functional Materials ◽  
Review Article ◽  
Molecular Scaffolds ◽  
Protein Sensing ◽  
Luminescent Probes ◽  
Guest Binding ◽  
Fluorogenic Probes ◽  
Self Assembled

Luminescent micelles are extensively studied molecular scaffolds used in applied supramolecular chemistry. These are particularly important due to their uniquely organized supramolecular structure and chemically responsive physical and optical features. Various luminescent tags can be incorporated with these amphiphilic micelles to create efficient luminescent probes that can be utilized as “chemical noses” (sensors) for toxic and hazardous materials, bioimaging, drug delivery and transport, etc. Due to their amphiphilic nature and well-defined reorganized self-assembled geometry, these nano-constructs are desirable candidates for size and shape complementary guest binding or sensing a specific analyte. A large number of articles describing micellar fluorogenic probes are reported, which are used for cation/anion sensing, amino acid and protein sensing, drug delivery, and chemo-sensing. However, this particular review article critically summarizes the sensing application of nitroaromatic (e.g., trinitrotoluene (TNT), trinitrobenzene (TNB), trinitrophenol (TNP), dinitrobenzene (DNB), etc.) and nitramine explosives (e.g., 1,3,5-trinitro-1,3,5-triazinane, trivially named as “research department explosive” (RDX), 1,3,5,7-tetranitro-1,3,5,7-tetrazocane, commonly known as “high melting explosive” (HMX) etc.). A deeper understanding on these self-assembled luminescent “functional materials” and the physicochemical behavior in the presence of explosive analytes might be helpful to design the next generation of smart nanomaterials for forensic applications. This review article will also provide a “state-of-the-art” coverage of research involving micellar–explosive adducts demonstrating the intermolecular charge/electron transfer (CT/ET) process operating within the host–guest systems.

Periodically ordered nanohetero inorganic structures of nanoparticles, nanorods and layers in a matrix from self-assembled block copolymers

2014 ◽  
Vol 1706 ◽  
Author(s):  
Hiroaki Wakayama ◽  
Hirotaka Yonekura ◽  
Yasuaki Kawai
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Three Dimensional ◽  
Functional Materials ◽  
Domain Size ◽  
Great Promise ◽  
Layer By Layer ◽  
Simple Method ◽  
Self Assembled ◽  
Size And Morphology

ABSTRACTPeriodically ordered nanohetero inorganic structures offer great promise due to their unique electric, ionic, magnetic, and photonic properties. Many studies have focused on the formation of periodically ordered nano-hetero inorganic structures through layer-by-layer adsorption, sputtering, and self-assembly methods. However, the construction of three-dimensional periodically ordered nanohetero inorganic structures with desired sizes and morphologies remains a great challenge. We present a simple method for producing three-dimensional periodically ordered inorganic nanoheterostructures with controlled shape and size by replicating self-assembled block copolymers (BCPs) containing precursors of metals and metal oxides. Precursors were dissolved with BCPs in a solvent. Upon evaporation of the solvent, each precursor was selectively introduced into a separate polymer block. Application of an external magnetic field (10 T) to the BCP-precursor composites resulted in a phase transition of from spheres to hexagonal cylinders. Subsequent pyrolytic removal of the BCPs produced periodically ordered nanoheterostructures that were structural replicates of the precursor–BCP composites. Self-assembled nano-hetero inorganic structures of nanoparticles, nanorods and layers in a matrix were produced. The morphology and domain size can be tailored by controlling the molecular weight and relative block length of block copolymers. The controlled size and morphology of the inorganic nanoheterostructures demonstrate the method’s utility for producing highly functional materials.

Nanopatterning of Functional Materials by Gas Phase Pattern Deposition of Self-Assembled Molecular Thin Films in Combination with Electrodeposition

Langmuir ◽  
2011 ◽  
Vol 27 (20) ◽  
pp. 12760-12768 ◽  
Author(s):  
Antony George ◽  
A. Wouter Maijenburg ◽  
Minh Duc Nguyen ◽  
Michiel G. Maas ◽  
Dave H. A. Blank ◽  
...  
Keyword(s):  
Thin Films ◽  
Gas Phase ◽  
Functional Materials ◽  
Phase Pattern ◽  
Molecular Thin Films ◽  
Self Assembled

Synthesis and characterization of photochromic triethylene glycol-containing spiropyrans and their assembly in solution

2021 ◽  
Author(s):  
Yiwei Zhang ◽  
Maggie Ng ◽  
Michael Ho-Yeung Chan ◽  
Nathan Man-Wai Wu ◽  
Lixin Wu ◽  
...  
Keyword(s):  
Functional Materials ◽  
Triethylene Glycol ◽  
Synthesis And Characterization ◽  
Self Assembled

A series of photochromic triethylene glycol (TEG)-containing spiropyrans (SPs) has been synthesized, and systematic and controlled formation of their self-assembled functional materials has been achieved.

Patterning Functional Materials Using Channel Diffused Plasma-Etched Self-Assembled Monolayer Templates

Langmuir ◽  
2011 ◽  
Vol 27 (19) ◽  
pp. 12235-12242 ◽  
Author(s):  
Antony George ◽  
A. Wouter Maijenburg ◽  
Michiel G. Maas ◽  
Dave H. A. Blank ◽  
Johan E. ten Elshof
Keyword(s):  
Functional Materials ◽  
Self Assembled Monolayer ◽  
Self Assembled

ChemInform Abstract: Functional Materials from Self-Assembled Bis-Urea Macrocycles

ChemInform ◽  
2014 ◽  
Vol 45 (34) ◽  
pp. no-no
Author(s):  
Linda S. Shimizu ◽  
Sahan R. Salpage ◽  
Arthur A. Korous
Keyword(s):  
Functional Materials ◽  
Self Assembled

High spatial resolution mapping of chemically-active self-assembled N-heterocyclic carbenes on Pt nanoparticles

2016 ◽  
Vol 188 ◽  
pp. 345-353 ◽  
Author(s):  
Y. Levratovsky ◽  
E. Gross
Keyword(s):  
Spatial Resolution ◽  
Metallic Nanoparticles ◽  
Active Sites ◽  
High Spatial Resolution ◽  
Chemical Properties ◽  
Pt Nanoparticles ◽  
Functional Materials ◽  
Resolution Mapping ◽  
Self Assembled ◽  
Ir Nanospectroscopy

The properties of many functional materials critically depend on the spatial distribution of surface active sites. In the case of solid catalysts, the geometric and electronic properties of different surface sites will directly impact their catalytic properties. However, the detection of catalytic sites at the single nanoparticle level cannot be easily achieved and most spectroscopic measurements are performed with ensemble-based measurements in which the reactivity is averaged over millions of nanoparticles. It is hereby demonstrated that chemically-functionalized N-heterocyclic carbene molecules can be attached to the surfaces of Pt nanoparticles and utilized as a model system for studying catalytic reactions on single metallic nanoparticles. The formation of a carbene self-assembled layer on the surface of a Pt nanoparticle and its stability under oxidizing conditions were investigated. IR nanospectroscopy measurements detected the chemical properties of surface-anchored molecules on single nanoparticles. A direct correlation was identified between IR nanospectroscopy measurements and macroscopic ATR-IR measurements. These results demonstrate that high spatial resolution mapping of the catalytic reactivity on single nanoparticles can be achieved with this approach.

scholarly journals Structural order enhances charge carrier transport in self-assembled Au-nanoclusters

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Florian Fetzer ◽  
Andre Maier ◽  
Martin Hodas ◽  
Olympia Geladari ◽  
Kai Braun ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Long Range ◽  
Finite Size ◽  
Functional Materials ◽  
Building Blocks ◽  
Optoelectronic Properties ◽  
Range Order ◽  
Long Range Order ◽  
Energetic Disorder ◽  
Self Assembled

AbstractThe collective properties of self-assembled nanoparticles with long-range order bear immense potential for customized electronic materials by design. However, to mitigate the shortcoming of the finite-size distribution of nanoparticles and thus, the inherent energetic disorder within assemblies, atomically precise nanoclusters are the most promising building blocks. We report an easy and broadly applicable method for the controlled self-assembly of atomically precise Au32(nBu3P)12Cl8 nanoclusters into micro-crystals. This enables the determination of emergent optoelectronic properties which resulted from long-range order in such assemblies. Compared to the same nanoclusters in glassy, polycrystalline ensembles, we find a 100-fold increase in the electric conductivity and charge carrier mobility as well as additional optical transitions. We show that these effects are due to a vanishing energetic disorder and a drastically reduced activation energy to charge transport in the highly ordered assemblies. This first correlation of structure and electronic properties by comparing glassy and crystalline self-assembled superstructures of atomically precise gold nanoclusters paves the way towards functional materials with novel collective optoelectronic properties.

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