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Information × Registration Number 0211U001386, 0110U004762 , R & D reports Title Development of the method of ultrasensitive surface-plasmon-enhanced diagnostics of molecular, biological and colloidal nanosystems for catalysis, medicine and enviroment protection popup.stage_title Head Valakh Mykhailo Yakovych, Доктор фізико-математичних наук Registration Date 01-02-2011 Organization Institute of Semiconductor Physics of National Academy of Sciences of Ukrain popup.description2 The structure of the lateral disordered and ordered nanostructured layers of nobel metals necessary for the further implementation of methods of a supersensitive optical diagnostics in semiconductor science and molecular biology, based on amplification of the characteristic inelastic scattering intensity. To implement this phase of the project the following study was conducted. Based on a preliminary calculation, gold and silver films with a thickness gradually changing from 45 to 5 nm were made. Variation of temperature annealing of such films in the range of 200 to get 500oС allowed nanoisland arrays with gradually varying size and surface density were prepared. Measurement of transmittance and reflectance spectra of these nanostructures allowed the dependence of the frequency of plasmon absorption maximum on nanoisland size to be established. The results are used for further development of laterally ordered island arrays. Besides, at the development of laterally ordered nanostructures, their varied form. In particular, the absorption spectra of 9 differently shaped ordered structures and impact of the shape of nanostructures on plasmon maximum, and itі half-widthwere studied. So at this stage, the substrate is created for the Surface Enhanced Raman scattering (SERS) of molecular layers of organic and inorganic clusters deposited onto ordered arrays of lateral nanoislands of gold and silver with the maximum plasmon resonance in the spectral region from 400 to 800 nm. The correlation between morphological parameters of nanostructures and spectral absorption plasmon band position and its half-width is established. The estimation of the value of signal amplification in SERS of rhodamine R6G is made depending on the morphological and optical parameters of gold and silver nanostructures. Product Description popup.authors Джаган Володимир Миколайович Костюкевич Сергій Олександрович Лисиця Михайло Павлович Юхимчук Володимир Олександрович Янчук Ігор Богданович popup.nrat_date 2020-04-02 Close