Liquid crystalline ordered arrays of gold nanoparticles in evaporative deposits

Gold nanoparticles assembly have been studied using two different evaporation techniques. To evaluate the influence CTAB molecules on self-assembly behavior 0.1 M CTAB suspension have been imaged via scanning helium ion microscopy (HIM) and then by SEM. By using immersion methode, dumbbell-like nano...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2020-09, Vol.709 (1), p.24-42
Main Authors: Ahmad, Imtiaz, Jan, Rahim, Khan, Hidayat Ullah, Hussain, Akhlaq
Format: Article
Language:English
Subjects:
Arrays
Coffee
Coffee-stain ring
Crystal structure
Crystallinity
CTAB
Domains
Evaporation
Gold
gold nanorods
Helium
Helium ions
Liquid crystals
Nanoparticles
Nanorods
Self-assembly
Submerging
Substrates
Superstructures
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Summary:Gold nanoparticles assembly have been studied using two different evaporation techniques. To evaluate the influence CTAB molecules on self-assembly behavior 0.1 M CTAB suspension have been imaged via scanning helium ion microscopy (HIM) and then by SEM. By using immersion methode, dumbbell-like nanoparticles crystallizes over the substrate in island-like arrays showing no specific ordered structures whereas gold nanorods crystallizes in ordered arrays within the deposited islands. However, droplet drying showed aligned arrays of gold nanorods all over the coffee-stain ring. For purified suspensions, domain-like superstructures observed away from the outer-region of the coffee stain. These crystalline arrays grows into domain-like superstructures hydrodynamically.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2020.1811603