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Atomic/molecular layer deposition of europium-organic thin films on nanoplasmonic structures towards FRET-based applications.

ABSTRACT: We present a novel atomic/molecular layer deposition (ALD/MLD) process for europium-organic thin films based on Eu(thd)₃ and 2-hydroxyquinoline-4-carboxylic acid (HQA) precursors. The process yields with appreciably high growth rate luminescent Eu-HQA thin films in which the organic HQA component acts as a sensitizer for the red Eu³⁺ luminescence, extending the excitation wavelength range up to ca. 400 nm. We moreover deposit these films on nanoplasmonic structures to achieve a twentyfold enhanced emission intensity. Finally, we demonstrate the FRET-type energy transfer process for our Eu-HQA coated nanoplasmonic structures in combination with commercial Alexa647 fluorophor, underlining their potential towards novel bioimaging applications.

SUBMITTER: Ghazy A

PROVIDER: S-EPMC10551872 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature

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Atomic/molecular layer deposition of europium-organic thin films on nanoplasmonic structures towards FRET-based applications.

Ghazy Amr A Ylönen Jonas J Subramaniyam Nagarajan N Karppinen Maarit M

Nanoscale 20231005 38

We present a novel atomic/molecular layer deposition (ALD/MLD) process for europium-organic thin films based on Eu(thd)3 and 2-hydroxyquinoline-4-carboxylic acid (HQA) precursors. The process yields with appreciably high growth rate luminescent Eu-HQA thin films in which the organic HQA component acts as a sensitizer for the red Eu3+ luminescence, extending the excitation wavelength range up to ca. 400 nm. We moreover deposit these films on nanoplasmonic structures t ...[more]

PMID: 37750381

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