INVESTIGATION OF InP GROWTH BANDS BY SELECTIV ELECTROCHEMICAL ETCHING

Abstract

Àííîòàöèÿ.  íàñòîÿùåé ðàáîòå ïðåäñòàâëåí ìåòîä íàáëþäåíèÿ ïîëîñ ðîñòà êðèñòàëëîâ InP, ëåãèðîâàííûõ ñåðîé, çàêëþ÷àþùèéñÿ â ýëåêòðîõèìè÷åñêîì òðàâëåíèè îáðàçöîâ.  ðå-çóëüòàòå íà ïîâåðõíîñòè èññëåäóåìûõ êðèñòàëëîâ îáðàçóåòñÿ êàðòèíà êîíöåíòðè÷åñêèõ òåì-íûõ êîëåö øèðèíîé ïîðÿäêà 100 ìêì, êîòîðûå ïðåäñòàâëÿþò ñîáîé ìåñòà íàèáîëåå ïëîòíî-ãî ñêîïëåíèÿ ïîð. Ïîðû ïðîðàñòàþò â òåõ îáëàñòÿõ, ãäå êîíöåíòðàöèÿ ñåðû ìàêñèìàëüíà. Ýòî ñâèäåòåëüñòâóåò â ïîëüçó âûáðàííîãî ìåòîäà äëÿ íàáëþäåíèÿ ñåãðåãàöèîííûõ ÿâëåíèé â êðèñòàëëå, êîòîðûå ïðîÿâëÿþòñÿ â âèäå ïîëîñ ðîñòà. Abstract. In this work the method of observation of InP crystals growth bands is presented. This method deals with electrochemical etching of samples. As a results the surface of concentric dark circles of 100 mkm width was appear on the surface of investigated crystals. Pores appeared in the fields with the highest concentration of sulfur. It proves the suitability of chosen method for observation of segration in crystals.

About synthesis mechanism of periodic oxide nanocrystallites on surface of single-crystal InP

“…The energy of the electron beam was chosen in the range of (10)(11)(12)(13)(14)(15) keV. The elemental composition of the samples was determined using an energy-dispersive spectrometer at an acceleration voltage of (15)(16)(17)(18)(19)(20) kV and a beam current of (1-3) nA. The quantitative analysis of the chemical composition of the sample surface was performed by comparing the characteristic lines of the sample with those of standards.…”

“…The following tasks are raised to scientists due to understanding of these trends: (1) selection of effective, inexpensive synthesis methods, which allow to create periodic nanostructures with the controlled properties [20,21]; (2) selection of the components of the substrate/nanostructure system with well-formed parameters [22].…”

Surface Modification of Gallium Arsenide by Electrochemical Methods in Different Electrolyte Compositions

“…8 All these modifications of the method are based on the crystal treatment with the acid or alkali solutions. 9,10 The result of such treatment can be the formation of the films on the crystal surface, 11,12 polishing, 13 surface passivation, 14,15 and the formation of the developed semiconductor nanorelief. 16,17 The main advantages of the electrochemical method are its simplicity, cheapness, process speed, and the lack of need to use high-tech and costly equipment.…”