WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/394

Browse

Filters

2021 - 20242

Settings

COAR Access Rights: search.filters.coarAccessRights.metadata only accessSubject: search.filters.subject.Dewetting

Search Results

Now showing 1 - 2 of 2
  • Article
    Citation - WoS: 88
    Citation - Scopus: 83
    Organic Light-Emitting Physically Unclonable Functions
    (Wiley-VCH Verlag GmbH, 2021-12-22) Kayaci, Nilgun; Ozdemir, Resul; Kalay, Mustafa; Kiremitler, N. Burak; Usta, Hakan; Onses, M. Serdar
    The development of novel physically unclonable functions (PUFs) is of growing interest and fluorescent organic semiconductors (f-OSCs) offer unique advantages of structural versatility, solution-processability, ease of processing, and great tuning ability of their physicochemical/optoelectronic/spectroscopic properties. The design and ambient atmosphere facile fabrication of a unique organic light-emitting physically unclonable function (OLE-PUF) based on a green-emissive fluorescent oligo(p-phenyleneethynylene) molecule is reported. The OLE-PUFs have been prepared by one-step, brief (5 min) thermal annealing of spin-coated nanoscopic films (approximate to 40 nm) at a modest temperature (170 degrees C), which results in efficient surface dewetting to form randomly positioned/sized hemispherical features with bright fluorescence. The random positioning of molecular domains generated the unclonable surface with excellent uniformity (0.50), uniqueness (0.49), and randomness (p > 0.01); whereas the distinctive photophysical and structural properties of the molecule created the additional security layers (fluorescence profile, excited-state decay dynamics, Raman mapping/spectrum, and infrared spectrum) for multiplex encoding. The OLE-PUFs on substrates of varying chemical structures, surface energies and flexibility, and direct deposition on goods via drop-casting are demonstrated. The OLE-PUFs immersed in water, exposed to mechanical abrasion, and read-out repeatedly via fluorescence imaging showed great stability. These findings clearly demonstrate that rationally engineered solution-processable f-OSCs have a great potential to become a key player in the development of new-generation PUFs.
  • Conference Object
    Enhanced Photoluminescence From Quantum Emitter-Nanoplasmonic Antenna Hybridization by a Facile Fabrication Method
    (IEEE, 2024-11-10) Genc, Sinan; Yilmaz, Alpay; Fernandez, Carlos Rodriguez; Caglayan, Humeyra; Bek, Alpan
    Gaps between tiny metallic nanostructures create strong local fields and small mode volumes, known as hybrid plasmonic modes. This study introduces a nanocavity formed by silver nanoparticles on a gold substrate with hexagonal boron nitride flakes, boosting quantum emitters' spontaneous emission and photoluminescence yield.