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Registration Number

0219U101528, 0119U101913 , R & D reports

Title

Design of plasmon-ehanced substrates for diagnostics of ultralow amounts of biological substances

Head

Valakh Mykhailo Ya., Доктор фізико-математичних наук

Registration Date

09-09-2019

Organization

V. Lashkaryov Institute of semiconductor physics

Description

 For the development of effective SERS substrates, the arrays of laterally ordered gold nanoisles were fabricated by interference photolithography. A series of nanostructured surfaces with different thicknesses of gold and photoresist were produced. Previous AFM studies of morphology have allowed us to choose the optimal thickness of gold at which nanoislands of required sizes are formed, namely, at a thickness of a gold coating - 55 nm and a layer of photoresist - 50 nm. Laterally ordered array of gold nano-islands with an average height of 55 nm, lateral sizes at the base of 200 nm and 150-200 nm distance between individual nano-islands were obtained. The period of the ordered array of nanostructures is 296.6 ± 0.5 nm. Morphological studies have shown that the obtained nanostructures at the apex of islands have a micro relief, and some adjacent nanoisles are contacted, so that to improve the quality of the substrates, some of them were subjected to thermal annealing in vacuum at 420 ° C for 5 min.

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Beketov Genadiy V.
Hreshchuk Oleksandr M.
Gyle Evgen H.
Dan`ko Viktor A.
Lukanyuk Mariya V.
Shepelyavyi Petro Ye.
Shynkarenko Olena V.
Yukhymchuk Volodymyr O.
Yaremko Anatoliy M.