Direct precipitation of CdS nanocrystals in glass by ultrafast laser pulses

Lipatiev, Alexey S.; Shakhgil’dyan, G. Yu.; Vetchinnikov, M. P.; Lee, Hojeong; Heo, Jong; Lotarev, S. V.; Сигаев, В. Н.

doi:10.1016/j.matlet.2021.130974

Cited by 2 publications

(1 citation statement)

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“…The result reached is quite important, because it demonstrates the possibility to tune QDs' properties just by acting on UV laser parameters, and opens the possibility to apply laser patterning of nanomaterials as a complimentary technique of photolithography contact and ink-jet printing in several fields of applications. Moreover, this technique is used not only to prepare CdTe QDs, but also other nanomaterials like CdS [48] and CdSe [17], and recently perovskite [40,44] and graphene [49].…”

Section: Discussionmentioning

confidence: 99%

Direct Laser Patterning of CdTe QDs and Their Optical Properties Control through Laser Parameters

2022

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Direct laser patterning is a potential and powerful technique to localize nanomaterials within a host matrix. The main goal of this study is to demonstrate that by tuning some parameters of a laser source, like power and laser pulse frequency, it is possible to modify and tune the optical properties of the generated quantum dots (QDs) within a host matrix of a specific chemical composition. The study is realized by using cadmium telluride (CdTe) QD precursors, embedded in polymethylmethacrylate (PMMA) host matrix, as starting materials. The patterning of the CdTe QDs is carried out by using a UV nanosecond laser source at 355. Fluorescence microscopy and photoluminescence spectroscopy, associated with transmission electron microscopy, indicate that it is possible to obtain desired patterns of QDs emitting from green to red of the visible spectrum, due to the formed CdTe QDs. Preliminary highlights of the CdTe QDs’ formation mechanism are given in terms of laser power and laser pulse frequency (repetition rate).

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