Hierarchical and hollow oxide nanostructures are very promising gas sensor materials due to their high surface area and well-aligned nanoporous structures with a less agglomerated configurations. Various synthetic strategies to prepare such hierarchical and hollow structures for gas sensor applications are reviewed and the principle parameters and mechanisms to enhance the gas sensing characteristics are investigated. The literature data clearly show that hierarchical and hollow nanostructures increase both the gas response and response speed simultaneously and substantially. This can be explained by the rapid and effective gas diffusion toward the entire sensing surfaces via the porous structures. Finally, the impact of highly sensitive and fast responding gas sensors using hierarchical and hollow nanostructures on future research directions is discussed.

Gas sensors using hierarchical and hollow oxide nanostructures: Overview

An engineering solution for mesh size effects in the simulation of delamination using cohesive zone models

A review on the mechanical and electrical properties of graphite and modified graphite reinforced polymer composites

Polylactide (PLA)-based nanocomposites

PLA composites: From production to properties

https://w3.iams.sinica.edu.tw/lab/jlli/cv/R08.pdf

Improved mechanical and functional properties of elastomer/graphite nanocomposites prepared by latex compounding

In Situ Self‐Assembly of Thin ZnO Nanoplatelets into Hierarchical Mesocrystal Microtubules with Surface Grafting of Nanorods: A General Strategy towards Hollow Mesocrystal Structures

https://dr.ntu.edu.sg/bitstream/10356/97310/2/Fire%20retardancy%20behavior%20of%20PLA%20based%20nanocomposites.pdf

Fire retardancy behavior of PLA based nanocomposites

Fracture toughness of nylon 6/organoclay/elastomer nanocomposites

This study focuses on achieving high stiffness/strength and high fracture toughness in nylon 6/organoclay nanocomposites prepared via melt compounding by incorporating a maleic anhydride grafted polyethylene–octene elastomer (POE-g-MA) as a toughening agent. Mechanical test results indicated that the ternary nanocomposites exhibited higher stiffness than nylon 6/POE-g-MA binary blends at any given POE-g-MA content. More importantly, the brittle–ductile transition of nylon 6/POE-g-MA blends was not impaired in the presence of organoclay for the compositions prepared in this study. TEM analysis shows that organoclay layers and elastomer particles were dispersed separately in nylon 6 matrix. In the binary nanocomposite, no noticeable plastic deformation was observed around the crack tip. In the ternary nanocomposites, the presence of organoclay in the matrix provided maximum reinforcement to the polymer, while their absence in the elastomer particles allowed the latter to promote high fracture toughness via particle cavitation and subsequent matrix shear yielding. The partially exfoliated clay layers also delaminated and hence, adding to the total toughness of the nanocomposites.

Szu-Hui Lim

Papers

Improved mechanical and functional properties of elastomer/graphite nanocomposites prepared by latex compounding

In Situ Self‐Assembly of Thin ZnO Nanoplatelets into Hierarchical Mesocrystal Microtubules with Surface Grafting of Nanorods: A General Strategy towards Hollow Mesocrystal Structures

Fire retardancy behavior of PLA based nanocomposites

Fracture toughness of nylon 6/organoclay/elastomer nanocomposites

Impact fracture behaviour of nylon 6-based ternary nanocomposites