scholarly journals A Review of Experimentally Informed Micromechanical Modeling of Nanoporous Metals: From Structural Descriptors to Predictive Structure–Property Relationships

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3307 ◽  
Author(s):  
Claudia Richert ◽  
Norbert Huber
Keyword(s):  
Network Structure ◽  
Topological Analysis ◽  
High Surface ◽  
Functional Materials ◽  
Model Systems ◽  
Micromechanical Modeling ◽  
Suitable Model ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Nanoporous Metals

Nanoporous metals made by dealloying take the form of macroscopic (mm- or cm-sized) porous bodies with a solid fraction of around 30%. The material exhibits a network structure of “ligaments” with an average ligament diameter that can be adjusted between 5 and 500 nm. Current research explores the use of nanoporous metals as functional materials with respect to electrochemical conversion and storage, bioanalytical and biomedical applications, and actuation and sensing. The mechanical behavior of the network structure provides the scope for fundamental research, particularly because of the high complexity originating from the randomness of the structure and the challenges arising from the nanosized ligaments, which can be accessed through an experiment only indirectly via the testing of the macroscopic properties. The strength of nanoscale ligaments increases systematically with decreasing size, and owing to the high surface-to-volume ratio their elastic and plastic properties can be additionally tuned by applying an electric potential. Therefore, nanoporous metals offer themselves as suitable model systems for exploring the structure–property relationships of complex interconnected microstructures as well as the basic mechanisms of the chemo-electro-mechanical coupling at interfaces. The micromechanical modeling of nanoporous metals is a rapidly growing field that strongly benefits from developments in computational methods, high-performance computing, and visualization techniques; it also benefits at the same time through advances in characterization techniques, including nanotomography, 3D image processing, and algorithms for geometrical and topological analysis. The review article collects articles on the structural characterization and micromechanical modeling of nanoporous metals and discusses the acquired understanding in the context of advancements in the experimental discipline. The concluding remarks are given in the form of a summary and an outline of future perspectives.

scholarly journals Probing the structure of framework materials by high pressure and the example of a magnetic, non-porous coordination polymer

2015 ◽  
Vol 71 (3) ◽  
pp. 247-249 ◽  
Author(s):  
Francesca P. A. Fabbiani
Keyword(s):  
High Pressure ◽  
Coordination Polymer ◽  
Coordination Compounds ◽  
Functional Materials ◽  
Research Tool ◽  
Structure Property ◽  
Framework Materials ◽  
Porous Framework ◽  
Structure Property Relationships ◽  
Porous Coordination Polymer

High pressure has become an indispensable research tool in the quest for novel functional materials. High-pressure crystallographic studies on non-porous, framework materials based on coordination compounds are markedly on the rise, enabling the unravelling of structural phenomena and taking us a step closer to the derivation of structure–property relationships.

scholarly journals Graphene- and Graphene Oxide-Based Nanocomposite Platforms for Electrochemical Biosensing Applications

2019 ◽  
Vol 20 (12) ◽  
pp. 2975 ◽  
Author(s):  
Madasamy Thangamuthu ◽  
Kuan Yu Hsieh ◽  
Priyank V. Kumar ◽  
Guan-Yu Chen
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
High Surface ◽  
High Surface Area ◽  
Cell Capture ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Electrochemical Biosensing ◽  
Graphene Derivatives ◽  
Enzymatic Biosensors

Graphene and its derivatives such as graphene oxide (GO) and reduced GO (rGO) offer excellent electrical, mechanical and electrochemical properties. Further, due to the presence of high surface area, and a rich oxygen and defect framework, they are able to form nanocomposites with metal/semiconductor nanoparticles, metal oxides, quantum dots and polymers. Such nanocomposites are becoming increasingly useful as electrochemical biosensing platforms. In this review, we present a brief introduction on the aforementioned graphene derivatives, and discuss their synthetic strategies and structure–property relationships important for biosensing. We then highlight different nanocomposite platforms that have been developed for electrochemical biosensing, introducing enzymatic biosensors, followed by non-enzymatic biosensors and immunosensors. Additionally, we briefly discuss their role in the emerging field of biomedical cell capture. Finally, a brief outlook on these topics is presented.

In situ characterization of Cu–Co oxides for catalytic application

2015 ◽  
Vol 177 ◽  
pp. 249-262 ◽  
Author(s):  
Z. Y. Tian ◽  
H. Vieker ◽  
P. Mountapmbeme Kouotou ◽  
A. Beyer
Keyword(s):  
Thermal Properties ◽  
Chemical Vapor ◽  
Functional Materials ◽  
Catalytic Performance ◽  
Structure Property ◽  
Temperature Oxidation ◽  
Spatially Resolved ◽  
Structure Property Relationships ◽  
Potential Applications

In situ emission and absorption FTIR methods were employed to characterize the spatially resolved structure of binary Co–Cu oxides for low-temperature oxidation of CO and propene. Co–Cu oxide catalysts were controllably synthesized by pulsed-spray evaporation chemical vapor deposition. XRD, FTIR, XPS, UV-vis and helium ion microscopy (HIM) were employed to characterize the as-prepared thin films in terms of structure, composition, optical and thermal properties as well as morphology. In situ emission FTIR spectroscopy indicates that Co3O4, CuCo2O4 and CuO are thermally stable at 650, 655 and 450 °C, respectively. The catalytic tests with absorption FTIR display that the involvement of Co–Cu oxides can initiate CO and C3H6 oxidation at lower temperatures. The results indicate that in situ emission and absorption FTIR are useful techniques to explore the thermal properties and catalytic performance of functional materials, allowing many potential applications in tailoring their temporally and spatially resolved structure-property relationships.

scholarly journals Heterometal Grafted metalla-ynes and Poly(metalla-ynes): A Review on Structure–Property Relationships and Applications

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3654
Author(s):  
Rayya A. Al-Balushi ◽  
Ashanul Haque ◽  
Idris J. Al-Busaidi ◽  
Houda Al-Sharji ◽  
Muhammad S. Khan
Keyword(s):  
Physical Properties ◽  
Main Chain ◽  
Functional Materials ◽  
Photo Luminescence ◽  
Structural Features ◽  
Side Chain ◽  
Structure Property ◽  
Molecular Scaffolds ◽  
Structure Property Relationships ◽  
Rigid Rod

Metalla-ynes and poly(metalla-ynes) have emerged as unique molecular scaffolds with fascinating structural features and intriguing photo-luminescence (PL) properties. Their rigid-rod conducting backbone with tunable photo-physical properties has generated immense research interests for the design and development of application-oriented functional materials. Introducing a second d- or f-block metal fragment in the main-chain or side-chain of a metalla-yne and poly(metalla-yne) was found to further modulate the underlying features/properties. This review focuses on the photo-physical properties and opto-electronic (O-E) applications of heterometal grafted metalla-ynes and poly(metalla-ynes).

SYNTHESIS AND CHARACTERIZATION OF FARNESENE-BASED POLYMERS

2017 ◽  
Vol 90 (2) ◽  
pp. 308-324 ◽  
Author(s):  
Taejun Yoo ◽  
Steven K. Henning
Keyword(s):  
Molecular Weight ◽  
Anionic Polymerization ◽  
Molar Mass ◽  
Functional Materials ◽  
Synthesis And Characterization ◽  
Low Molecular Weight ◽  
Structure Property ◽  
Structure Property Relationships ◽  
By Products

ABSTRACT A bio-based route to the production of trans-β-farnesene has recently been commercialized. Trans-β-farnesene is capable of being polymerized by both anionic and cationic pathways, creating low molecular weight polymers with structure–property relationships unique within the diene class of monomers. Trans-β-farnesene is produced through fermentation of sugar feedstocks. The pathway offers an alternative to petroleum-based feedstocks derived as by-products of naphtha or ethane cracking. Anionic polymerization of the monomer produces a highly branched “bottlebrush” structure, with rheological properties that are markedly different than those of linear diene polymers. Specifically, a lack of entanglements is observed even at relatively high molar masses. For hydroxyl-terminated oligomers, Tg as a function of molar mass follows a trend opposite non-functional materials. The synthesis and characterization of trans-β-farnesene–based polymers will be presented, including anionically prepared low molecular weight diols and monols.

Embedding heteroatoms: an effective approach to create porphyrin-based functional materials

2017 ◽  
Vol 46 (39) ◽  
pp. 13322-13341 ◽  
Author(s):  
Norihito Fukui ◽  
Keisuke Fujimoto ◽  
Hideki Yorimitsu ◽  
Atsuhiro Osuka
Keyword(s):  
Functional Materials ◽  
Structure Property ◽  
Research Fields ◽  
Structure Property Relationships ◽  
Synthetic Methodologies

Incorporation of planarized heteroatom(s) onto the porphyrin periphery is an effective approach to create porphyrin-based functional materials. This review aims to cover a variety of synthetic methodologies that have been developed for the construction of heteroatom-embedded porphyrins as well as their structure–property relationships and possible applications in various research fields.

Informatics-Based Approaches for Accelerated Discovery of Functional Materials

2016 ◽  
pp. 192-223 ◽  
Author(s):  
P. V. Balachandran ◽  
J. M. Rondinelli
Keyword(s):  
Mathematical Modeling ◽  
Hypothesis Testing ◽  
Functional Materials ◽  
Ceramic Materials ◽  
Hypothesis Generation ◽  
Illustrative Case ◽  
Materials Informatics ◽  
Structure Property ◽  
Database Construction ◽  
Structure Property Relationships

This chapter is aimed at readers interested in the topic of informatics-based approaches for accelerated materials discovery, but who are unfamiliar with the nuances of the underlying principles and various types of powerful mathematical tools that are involved in formulating structure–property relationships. In an attempt to simplify the workflow of materials informatics, we decompose the paradigm into several core subtasks: hypothesis generation, database construction, data pre-processing, mathematical modeling, model validation, and finally hypothesis testing. We discuss each task and provide illustrative case studies, which apply these methods to various functional ceramic materials.

Informatics-Based Approaches for Accelerated Discovery of Functional Materials

2017 ◽  
pp. 153-184
Author(s):  
P. V. Balachandran ◽  
J. M. Rondinelli
Keyword(s):  
Mathematical Modeling ◽  
Hypothesis Testing ◽  
Functional Materials ◽  
Ceramic Materials ◽  
Hypothesis Generation ◽  
Illustrative Case ◽  
Materials Informatics ◽  
Structure Property ◽  
Database Construction ◽  
Structure Property Relationships

This chapter is aimed at readers interested in the topic of informatics-based approaches for accelerated materials discovery, but who are unfamiliar with the nuances of the underlying principles and various types of powerful mathematical tools that are involved in formulating structure–property relationships. In an attempt to simplify the workflow of materials informatics, we decompose the paradigm into several core subtasks: hypothesis generation, database construction, data pre-processing, mathematical modeling, model validation, and finally hypothesis testing. We discuss each task and provide illustrative case studies, which apply these methods to various functional ceramic materials.

Sign in / Sign up

Export Citation Format

Share Document