Materials by design

2021 ◽  
pp. 102-113
Author(s):  
Adrian P Sutton
Keyword(s):  
Quantum Dots ◽  
Photonic Crystals ◽  
Complex Systems ◽  
Smart Materials ◽  
Self Assembly ◽  
Systems Approach ◽  
Materials Design ◽  
Self Healing ◽  
Materials Selection ◽  
Materials By Design

Materials design brings together the engineering requirements of a material for an application with the science of the relationships between the structure, properties and method of fabrication of the material. It also takes into account the conditions into which the material will be put in service. It is different from materials selection and materials discovery. The concepts of microstructure and materials as complex systems are introduced. An example is given of materials design using a systems approach. Some materials are produced by self-assembly, as illustrated by the bubble raft, photonic crystals and quantum dots. Self-healing materials and self-cleaning glass are two examples of smart materials.

scholarly journals EXPERIMENTAL STUDY OF 3D SELF-ASSEMBLED PHOTONIC CRYSTALS AND COLLOIDAL CORE-SHELL SEMICONDUCTOR QUANTUM DOTS

2017 ◽  
Vol 24 (1&2) ◽  
pp. 161-170
Author(s):  
Pham Thu Nga ◽  
Vu Duc Chinh ◽  
Nguyen Xuan Nghia ◽  
Nguyen Viet Huy ◽  
Dao Nguyen Thuan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Quantum Dots ◽  
Optical Properties ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Self Assembly ◽  
Photonic Band Gap ◽  
Semiconductor Quantum Dots ◽  
Core Shell ◽  
Sphere Diameter

In this contribution we present an experimental study of 3D opal photonic crystals. The samples are opals constituted by colloidal silica spheres, realized with self-assembly technique. The sphere diameter is selected in order to obtain coupling of the photonic band gap with the emission from CdSe/ZnS colloidal quantum dots. The quantum dots infiltrated in the opals is expected to be enhanced or suppressed depending on the detection angle from the photonic crystal. The structural and optical characterization of the SiO2 opal photonic crystals are performed by field-emission scanning electron microscopy and reflectivity spectroscopy. Measurements performed on samples permits to put into evidence the influence of the different preparation methods on the optical properties. Study of self-activated luminescence of the pure opals is also presented. It is shown that the luminescence of the sample with QDs have original QD emission and not due to the photonic crystal structure. The optical properties of colloidal core-shell semiconductor quantum dots of CdSe/ZnS which are prepared in our lab will be mention.

Heat-Shielding and Self-Cleaning Smart Windows: Near-Infrared Reflective Photonic Crystals with Self-Healing Omniphobicity via Layer-by-Layer Self-Assembly

2018 ◽  
Vol 10 (26) ◽  
pp. 22731-22738 ◽  
Author(s):  
Chiaki Nakamura ◽  
Kengo Manabe ◽  
Mizuki Tenjimbayashi ◽  
Yuki Tokura ◽  
Kyu-Hong Kyung ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Self Assembly ◽  
Near Infrared ◽  
Layer By Layer ◽  
Self Healing ◽  
Smart Windows ◽  
Self Cleaning ◽  
Heat Shielding

Carbon Nanotubes, Quantum Dots and Dendrimers as Potential Nanodevices for Nanotechnology Drug Delivery Systems

2013 ◽  
Vol 6 (3) ◽  
pp. 2113-2124
Author(s):  
Prashant Malik ◽  
Neha Gulati ◽  
Raj Kaur Malik ◽  
Upendra Nagaich
Keyword(s):  
Carbon Nanotubes ◽  
Drug Delivery ◽  
Quantum Dots ◽  
Self Assembly ◽  
Drug Delivery Systems ◽  
Delivery Systems ◽  
Atomic Scale ◽  
Sustained Drug Delivery ◽  
Pharmaceutical Nanotechnology ◽  
Conventional Device

Nanotechnology deal with the particle size in nanometers. Nanotechnology is ranging from extensions of conventional device physics to completely new approaches based upon molecular self assembly, from developing new materials with dimensions on the nanoscale to direct control of matter on the atomic scale. In nanotechnology mainly three types of nanodevices are described: carbon nanotubes, quantum dots and dendrimers. It is a recent technique used as small size particles to treat many diseases like cancer, gene therapy and used as diagnostics. Nanotechnology used to formulate targeted, controlled and sustained drug delivery systems. Pharmaceutical nanotechnology embraces applications of nanoscience to pharmacy as nanomaterials and as devices like drug delivery, diagnostic, imaging and biosensor materials. Pharmaceutical nanotechnology has provided more fine tuned diagnosis and focused treatment of disease at a molecular level.    

Self-healing Polymeric Hydrogels: Toward Multifunctional Soft Smart Materials

2021 ◽  
Author(s):  
Xiao-Ling Zuo ◽  
Shao-Fan Wang ◽  
Xiao-Xia Le ◽  
Wei Lu ◽  
Tao Chen
Keyword(s):  
Smart Materials ◽  
Self Healing ◽  
Polymeric Hydrogels

Luminescent Photonic Crystals with Extreme‐UV Bandgaps Made of CuInSe 2 Quantum Dots

2021 ◽  
pp. 2000757
Author(s):  
Qiqi Wang ◽  
Hongxia Li ◽  
Weina Cui ◽  
Huaixiu Xu ◽  
Jiyang Fan
Keyword(s):  
Quantum Dots ◽  
Photonic Crystals ◽  
Extreme Uv

scholarly journals Soil as an Archetype of Complexity: A Systems Approach to Improve Insights, Learning, and Management of Coupled Biogeochemical Processes and Environmental Externalities

Soil Systems ◽  
2021 ◽  
Vol 5 (3) ◽  
pp. 39
Author(s):  
Benjamin L. Turner
Keyword(s):  
Complex Systems ◽  
Systems Approach ◽  
Environmental Externalities ◽  
Supporting Evidence ◽  
Soil System ◽  
Tillage Practices ◽  
Trade Offs ◽  
Tightly Coupled ◽  
Conservation Adoption ◽  
Systems Framework

Due to tightly coupled physical, chemical, and biological processes that often behave in nonlinear, counterintuitive ways, it is argued that soil is an archetype of a complex system. Unfortunately, human intuition and decision making has been shown to be inadequate when dealing with complex systems. This poses significant challenges for managers or policy makers responding to environmental externalities where soil dynamics play a central role (e.g., biogeochemical cycles) and where full ranges of outcomes result from numerous feedback processes not easily captured by reductionist approaches. In order to improve interpretation of these soil feedbacks, a dynamic systems framework is outlined (capturing feedback often excluded from investigation or left to intuition) and then applied to agroecosystem management problems related to irrigation or tillage practices that drive nutrient cycling (e.g., soil water, nitrogen, carbon, and sodium). Key soil feedbacks are captured via a variety of previously developed models simulating soil processes and their interactions. Results indicated that soil system trade-offs arising from conservation adoption (drip irrigation or no-tillage) provided reasonable supporting evidence (via compensating feedbacks) to managers justifying slow adoption of conservation practices. Modeling soils on the foundation provided in the complex systems sciences remains an area for innovations useful for improving soil system management.

Photoinduced Self‐Assembly of Carbon Nitride Quantum Dots

2021 ◽  
Author(s):  
Zheng Xing ◽  
Kaituo Dong ◽  
Nick G Pavlopoulos ◽  
Yuexing Chen ◽  
Lilac Amirav
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Carbon Nitride

scholarly journals Nucleation of Ga droplets self-assembly on GaAs(111)A substrates

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Artur Tuktamyshev ◽  
Alexey Fedorov ◽  
Sergio Bietti ◽  
Stefano Vichi ◽  
Riccardo Tambone ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Size Distribution ◽  
Self Assembly ◽  
Cluster Size ◽  
Droplet Size Distribution ◽  
Local Environment ◽  
The Self ◽  
Critical Cluster ◽  
Droplet Nucleation ◽  
High Degree

AbstractWe investigated the nucleation of Ga droplets on singular GaAs(111)A substrates in the view of their use as the seeds for the self-assembled droplet epitaxial quantum dots. A small critical cluster size of 1–2 atoms characterizes the droplet nucleation. Low values of the Hopkins-Skellam index (as low as 0.35) demonstrate a high degree of a spatial order of the droplet ensemble. Around $$350\,^{\circ }\hbox {C}$$ 350 ∘ C the droplet size distribution becomes bimodal. We attribute this observation to the interplay between the local environment and the limitation to the adatom surface diffusion introduced by the Ehrlich–Schwöbel barrier at the terrace edges.

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