• ZHIQIANG LI

Articles written in Bulletin of Materials Science

• Fabrication of crystalline Sb$_2$S$_3$ sheaf structure composed of nanorods by a hot-injection method

Herein,we demonstrate a hot-injection method towards the fabrication of Sb$_2$S$_3$. The evolution from amorphous Sb$_2$S$_3$ nanoparticles to a sheaf of Sb$_2$S$_3$ nanorods cross-linked together occurring with the increase of reaction temperature and time is studied. The structural, compositional and morphological features of Sb$_2$S$_3$ products indicate the formation of crystalline Sb$_2$S$_3$ with orthorhombic phase and high purity. As the reaction proceeds, it can be observed that the individual nanorod grows along the elongated direction ($c$-axis), and it is noteworthy that its round cross-section could develop into the rectangular cross-section subsequently. In this study we also propose a possible formation mechanism for the growthprocess of Sb$_2$S$_3$, and it reveals that the present hot-injection could provide an ideal growth environment for synthesizing the nanostructured materials by optimizing the experimental parameters.

• Nanoindentation for mechanical behaviour characterization of nanoporous silver fabricated through dealloying

Nanoporous silver fabricated by dealloying can be a promising material in many potential applications due to its distinctive physical and chemical characteristics. For making it widely used in actual production, mechanical properties of nanoporous silver with an open sponge-like morphology of interconnecting ligaments on the nanometre length scale have been investigated by nanoindentation, combined with scanning electron microscopy characterization. Both the hardness and elastic modulus present a decreasing tendency along with increase in ligament size. The individual ligaments near the cracks underwent intense plastic deformation before rupture. As the scaling laws cannot be used to estimate the variation of mechanical properties with the ligaments coarsening, a scaling relation for the yield strength of nanoporous silver by incorporating the ligament size is proposed, which can be used to estimate the yield strength of nanoporous silver with different ligament sizes. Finally, the influence of ligament size on mechanical properties is discussed.

• Bulletin of Materials Science

Volume 44, 2021
All articles
Continuous Article Publishing mode

• Dr Shanti Swarup Bhatnagar for Science and Technology

Posted on October 12, 2020

Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020