Piezo-mechanical impedance of a nanosized CdS single crystal

• Опубліковано в: : Semiconductor Physics Quantum Electronics & Optoelectronics
• Дата: 2019
• Автори: Bogoslovskaya, A.B., Khalimovskyy, O.M., Grynko, D.O.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2019
• Теми: Optoelectronics and optoelectronic devices
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/215581
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Piezo-mechanical impedance of nanosized CdS single crystal / A.B. Bogoslovskaya, O.M. Khalimovskyy, D.O. Grynko // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2019. — Т. 22, № 4. — С. 479-485. — Бібліогр.: 20 назв. — англ.

The design of a piezo-mechanical device based on a nanosized CdS single crystal is a challenging task for demonstrating both the technological capabilities of crystal growth control in order to form simple sensor device topologies and the integrated usage of unique material properties with a bottom-up approach. Analysis of luminescence spectra of CdS nanocrystals grown from the gas phase at a temperature of 400 °C in the quasi-closed volume revealed that doping takes place with tin, as a component of ITO conductive film, simultaneously with doping with gold or silver from catalyze droplets. Piezo-mechanical longitudinal vibrations along the main symmetry axis of wurtzite-type single crystal have been presented in the continuous medium approximation based on experimental values of the nanocrystal piezo-module. Theoretical analysis of the frequency dependence of resonance oscillations for the nanosized beam-type piezo-mechanical resonators based on the CdS nanocrystal enabled us to ascertain the equivalent RLC two-pole and values of the equivalent elements L and C prognosticated: there are high values of L, tens and hundreds of henry, and very small values of the series capacitance of the order of femto- and attofarads. Below the resonance, the impedance of the crystal reaches gigaohms and has an inductive character.