Synthesis of Nanostructures in Nanowires Using Sequential Catalyst Reactions
Overview
Affiliations
Nanowire growth by the vapour-liquid-solid (VLS) process enables a high level of control over nanowire composition, diameter, growth direction, branching and kinking, periodic twinning, and crystal structure. The tremendous impact of VLS-grown nanowires is due to this structural versatility, generating applications ranging from solid-state lighting and single-photon sources to thermoelectric devices. Here, we show that the morphology of these nanostructures can be further tailored by using the liquid droplets that catalyse nanowire growth as a 'mixing bowl', in which growth materials are sequentially supplied to nucleate new phases. Growing within the liquid, these phases adopt the shape of faceted nanocrystals that are then incorporated into the nanowires by further growth. We demonstrate this concept by epitaxially incorporating metal-silicide nanocrystals into Si nanowires with defect-free interfaces, and discuss how this process can be generalized to create complex nanowire-based heterostructures.
Direct Observations of Twin Formation Dynamics in Binary Semiconductors.
Tornberg M, Sjokvist R, Kumar K, Andersen C, Maliakkal C, Jacobsson D ACS Nanosci Au. 2023; 2(1):49-56.
PMID: 37101516 PMC: 10125175. DOI: 10.1021/acsnanoscienceau.1c00021.
Dissecting Biological and Synthetic Soft-Hard Interfaces for Tissue-Like Systems.
Fang Y, Yang X, Lin Y, Shi J, Prominski A, Clayton C Chem Rev. 2021; 122(5):5233-5276.
PMID: 34677943 PMC: 8917063. DOI: 10.1021/acs.chemrev.1c00365.
Self-inhibition effect of metal incorporation in nanoscaled semiconductors.
Zhu B, Yi D, Wang Y, Sun H, Sha G, Zheng G Proc Natl Acad Sci U S A. 2021; 118(4).
PMID: 33468669 PMC: 7848686. DOI: 10.1073/pnas.2010642118.
Atomic-Scale Mechanism of Unidirectional Oxide Growth.
Sun X, Zhu W, Wu D, Liu Z, Chen X, Yuan L Adv Funct Mater. 2020; 30(4).
PMID: 33029110 PMC: 7537547.
Alizadeh M, Binti Hamzan N, Ooi P, Bin Omar M, Dee C, Goh B Materials (Basel). 2019; 12(4).
PMID: 30813502 PMC: 6416589. DOI: 10.3390/ma12040674.