scholarly journals Strain-driven autonomous control of cation distribution for artificial ferroelectrics

2021 ◽  
Vol 7 (18) ◽  
pp. eabd7394
Author(s):  
Changhee Sohn ◽  
Xiang Gao ◽  
Rama K. Vasudevan ◽  
Sabine M. Neumayer ◽  
Nina Balke ◽  
...  
Keyword(s):  
Functional Materials ◽  
Material Design ◽  
Mechanical Deformation ◽  
Strain Engineering ◽  
New Materials ◽  
Crystallographic Position ◽  
Atomic Position ◽  
Steep Ascent ◽  
Specific Position ◽  
Synthesis Methodology

In past few decades, there have been substantial advances in theoretical material design and experimental synthesis, which play a key role in the steep ascent of developing functional materials with unprecedented properties useful for next-generation technologies. However, the ultimate goal of synthesis science, i.e., how to locate atoms in a specific position of matter, has not been achieved. Here, we demonstrate a unique way to inject elements in a specific crystallographic position in a composite material by strain engineering. While the use of strain so far has been limited for only mechanical deformation of structures or creation of elemental defects, we show another powerful way of using strain to autonomously control the atomic position for the synthesis of new materials and structures. We believe that our synthesis methodology can be applied to wide ranges of systems, thereby providing a new route to functional materials.

Unique Functional Materials Derived from β-Amino Acid Oligomers

2017 ◽  
Vol 70 (2) ◽  
pp. 126 ◽  
Author(s):  
Mark P. Del Borgo ◽  
Ketav Kulkarni ◽  
Marie-Isabel Aguilar
Keyword(s):  
Amino Acid ◽  
Drug Design ◽  
Self Assembly ◽  
Functional Materials ◽  
Bioactive Molecules ◽  
Peptide Drug ◽  
New Materials ◽  
Amino Acid Oligomers

The unique structures formed by β-amino acid oligomers, or β-peptide foldamers, have been studied for almost two decades, which has led to the discovery of several distinctive structures and bioactive molecules. Recently, this area of research has expanded from conventional peptide drug design to the formation of assemblies and nanomaterials by peptide self-assembly. The unique structures formed by β-peptides give rise to a set of new materials with altered properties that differ from conventional peptide-based materials; such new materials may be useful in several bio- and nanomaterial applications.

scholarly journals Doping by Design: Finding New n-type Dopable ABX4 Zintl Phases for Thermoelectrics

2020 ◽  
Author(s):  
Jiaxing Qu ◽  
Vladan Stevanovic ◽  
Elif Ertekin ◽  
Prashun Gorai
Keyword(s):  
Functional Properties ◽  
Functional Performance ◽  
Functional Materials ◽  
Design Strategy ◽  
Computational Approach ◽  
New Materials ◽  
Zintl Phases ◽  
Prototype Structure ◽  
New Compounds

Doping remains a bottleneck in discovering novel functional materials for applications such as thermoelectrics (TE) and photovoltaics. The current computational approach to materials discovery is to identify candidates by predicting the functional properties of a pool of known materials, and hope that the candidates can be appropriately doped. What if we could "design" new materials that have the desired functionalities and doping properties? In this work, we use an approach, wherein we perform chemical replacements in a prototype structure, to realize doping by design. We hypothesize that the doping characteristics and functional performance of the prototype structure are translated to the new compounds created by chemical replacements. Discovery of new <i>n</i>-type Zintl phases is desirable for TE; however, <i>n</i>-type Zintl phases are a rarity. We demonstrate our doping design strategy by discovering 7 new, previously-unreported ABX<sub>4</sub> Zintl phases that adopt the prototypical KGaSb<sub>4</sub> structure. Among the new phases, we computationally confirm that NaAlSb<sub>4</sub>, NaGaSb<sub>4</sub> and CsInSb<sub>4</sub> are <i>n</i>-type dopable and potentially exhibit high <i>n</i>-type TE performance, even exceeding that of KGaSb<sub>4</sub>. Our structure prototyping approach offers a promising route to discover new materials with designed doping and functional properties.

Elucidation of Accumulation Mechanism of Environmental Pollutants into Living Body and Defense Mechanism from Health Damage with Chemicals

2011 ◽  
Vol 183-185 ◽  
pp. 1020-1024
Author(s):  
De Li Chen ◽  
Run Qing Yang ◽  
Tian Zhu Li ◽  
Li Long Yan ◽  
Xiao Hui Wang ◽  
...  
Keyword(s):  
Defense Mechanism ◽  
Environmental Pollutants ◽  
Functional Materials ◽  
Assay Method ◽  
New Materials ◽  
Living Body ◽  
Innovative Methodology ◽  
Health Damage ◽  
Accumulation Mechanism ◽  
Accumulation Of Pollutants

In this study, the mechanism of accumulation of pollutants into living body and defense from health damage were elucidated. Based on the obtained knowledge in this program, the innovative methodology and new functional materials for purification and the restoration were developed. Through these activities, the sustainable understanding and trust about the pollution issuse were established. Six research projects were expected by the fusion of the results. We had investigated the environments around waterfowls which come flying mutually, and the concentration of pollutants in water, soil, fold in wet land and also in waterfowl were measured cooperatively and the accumulation mechanism were clarified. The microchip electrochemistry assay method is developed and applied to actual environments. New materials and methodologies based on the konwledge of the mechanism of accumulation and the defense from health damage were developed.

scholarly journals Design of Heat-Conductive hBN–PMMA Composites by Electrostatic Nano-Assembly

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 134 ◽  
Author(s):  
Atsushi Yokoi ◽  
Wai Kian Tan ◽  
Taichi Kuroda ◽  
Go Kawamura ◽  
Atsunori Matsuda ◽  
...  
Keyword(s):  
Composite Materials ◽  
Hexagonal Boron Nitride ◽  
Functional Materials ◽  
Polymeric Materials ◽  
Material Design ◽  
Heat Conducting ◽  
Matrix Composites ◽  
Assembly Method ◽  
Functional Additives ◽  
Energy Consuming

Micro/nanoscale design of composite materials enables alteration of their properties for advanced functional materials. One of the biggest challenges in material design is the controlled decoration of composite materials with the desired functional additives. This study reports on and demonstrates the homogeneous decoration of hexagonal boron nitride (hBN) on poly(methylmethacrylate) (PMMA) and vice versa. The formation of the composite materials was conducted via a low environmental load and a low-energy-consuming, electrostatic nano-assembly method which also enabled the efficient usage of nano-sized additives. The hBN/PMMA and PMMA/hBN composites were fabricated in various size combinations that exhibited percolated and layer-oriented structures, respectively. The thermal conductivity behaviors of hBN/PMMA and PMMA/hBN composites that exhibited good microstructure were compared. The results showed that microstructural design of the composites enabled the modification of their heat-conducting property. This novel work demonstrated the feasibility of fabricating heat-conductive PMMA matrix composites with controlled decoration of hBN sheets, which may provide a platform for further development of heat-conductive polymeric materials.

scholarly journals Strain engineering in functional materials

AIP Advances ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 030701 ◽  
Author(s):  
G. Tsutsui ◽  
S. Mochizuki ◽  
N. Loubet ◽  
S. W. Bedell ◽  
D. K. Sadana
Keyword(s):  
Functional Materials ◽  
Strain Engineering

scholarly journals The Analysis of the Characteristic Development of Material Chemistry Specialty under the Background of "Big Materials"

2019 ◽  
Vol 3 (3) ◽  
pp. 172
Author(s):  
Zegong Zhang
Keyword(s):  
Material Science ◽  
Rapid Development ◽  
Functional Materials ◽  
New Materials ◽  
Energy Materials ◽  
Chemistry Major ◽  
Material Chemistry ◽  
Nanometer Materials ◽  
New Energy ◽  
Teaching Purpose

<p>With the rapid development of science and technology, the material discipline also developed rapidly, and gradually developed a lot of new materials. With the emergence of new materials, there are many specialties such as nanometer materials and technology, functional materials, new energy materials and devices. The material chemistry major is a kind of material and chemistry cross traditional major. The teaching purpose of material chemistry major is to improve students' knowledge and skills in material chemistry, so that they can carry out scientific research, teaching, development and other management work in engineering, material science and other related industries, and become an innovative talent in the field of material science. At present, in the environment of rapid development of large materials, the most prominent problem of material chemistry major is how to highlight the specialty characteristics as much as possible in this environment, so as to realize the construction and development of specialty characteristics.</p>

scholarly journals Strain Engineering in Functional Materials

2019 ◽  
Vol 125 (8) ◽  
pp. 082201 ◽  
Author(s):  
Jian Shi ◽  
Long-Qing Chen
Keyword(s):  
Functional Materials ◽  
Strain Engineering

scholarly journals NANOBIOMATERIALS LIBRARY SYNTHESIS FOR HIGH-THROUGHPUT SCREENING USING A DRY POWDER PRINTING METHOD

Nano LIFE ◽  
2012 ◽  
Vol 02 (01) ◽  
pp. 1250006 ◽  
Author(s):  
ZONGQI LI ◽  
SHOUFENG YANG
Keyword(s):  
High Throughput ◽  
Tricalcium Phosphate ◽  
High Throughput Screening ◽  
Functional Materials ◽  
Powder Materials ◽  
Library Synthesis ◽  
New Materials ◽  
Dry Powder ◽  
Unit Design ◽  
Printing Method

High-throughput (HT) screening and combinatorial searches for the discovery, development and optimization of functional materials have been widely accepted in many new materials discovery. Dry powder HT library synthesis have advantages such as using same powder materials in lab as in production, and avoiding the use of additives and/or solvents which could be harmful for cells. The VaryDose dry powder dispensing technology was adapted in this work to dispense nanobioceramic powders in quantities as low as 0.1 mg per dispensing. Nanocalcium phosphate biomaterials, including hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP), were selected to demonstrate the library fabrication. The dispensing unit design and the effect of the dispensing parameters on dosage control and uniformity are discussed.

scholarly journals Anisotropic Magnetism in Gradient Porous Carbon Composite Aerogels

2021 ◽  
Vol 7 (1) ◽  
pp. 22
Author(s):  
Jochen Bahner ◽  
Nicolas Hug ◽  
Sebastian Polarz
Keyword(s):  
Porous Carbon ◽  
High Surface ◽  
Sol Gel ◽  
Functional Materials ◽  
Material Design ◽  
Carbon Composite ◽  
Functionally Graded ◽  
Carbon Aerogels ◽  
Pore Sizes ◽  
Composite Aerogels

Porosity is of high importance for functional materials, as it allows for high surface areas and the accessibility of materials. While the fundamental interplay between different pore sizes and functionalities is quite well understood, few studies on gradually changing properties in a material exist. To date, only a few examples of such materials have been synthesized successfully. Herein, we present a facile method for synthesizing macroscopic carbon aerogels with locally changing pore sizes and functionalities. We used ultracentrifugation to fractionate differently functionalized and sized polystyrene nanoparticles. The assembly into gradient templates was conducted in a resorcinol–formaldehyde (RF) sol, which acted as a liquid phase and carbon precursor. We show that the modification of nanoparticles and a sol–gel precursor is a powerful tool for introducing dopants (sulfur and phosphorous) and metal nanoparticles (e.g., Ni) into gradient porous carbons formed during the carbonization of the RF sol. Understanding the underlying interactions between particles and precursors will lead to a plethora of possibilities in the material design of complex functionally graded materials. We showed this by exchanging parts of the template with magnetite–polystyrene composites as templating nanoparticles. This led to the incorporation of magnetite nanoparticles in the formed gradient porous carbon aerogels. Finally, gradually increasing concentrations of magnetite were obtained, ultimately leading to macroscopic carbon aerogels with locally changing magnetic properties, while the graded porosity was maintained.

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