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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:44 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Nanospheres self-assembly in laser ablation of a colloidal film
Authors:
Ion SANDU(1), Maria BADICEANU(1,2)
Affiliation:
1)National Institute for Laser, Plasma and Radiation Physics (NILPRP), Atomistilor 409, P.O. Box MG 36, R-077125, Magurele, Bucharest, Romania
2)University of Bucharest, Faculty of Physic, Romania
E-mail
badiceanu.maria@gmail.com
Keywords:
Self-assembly,laser ablation, colloidal film, ripples, monolayer ribbon .
Abstract:
We recently showed [1] that after irradiation of thin films ionic salts (NaCl, K2CrO4) diluted solutions with a single pulse Infra-Red (IR) laser, many circular ripples of single crystals are formed. The present paper continues this study by using nanospheres colloidal solutions (300 nm, 500 nm, 1 µm) instead of ionic salts. Using the same conditions as in the case of ionic salts, besides ripples, we observe the formation of a large nanosphere monolayer ribbon in which the range order of self-assembled nanosphere is quite remarkable for a dynamic self-assembly process. The resulted monolayers can be used as opto-electrical or opto-magnetical sensors but also providing important information about the dynamic self-assembly phenomenon.
References:
[1] Ion Sandu, Iuliana Urzica,, Ana Maria Niculescu, Claudiu Teodor Fleaca, Florian Dumitrache, Maria Badiceanu, Self-organisation of single-crystals as ripple patterns through laser ablation of ionic salt solutions, Applied Surface Science 417 (2017) 160–164.
Acknowledgement:
This work was financed by the National Authority for Researchand Innovation in the frame of the Nucleus Programme (contract4N/2016).
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