Colecția instituțională: Recent submissions

Now showing items 8561-8580 of 11876

Излучательные свойства эпитаксиальных слоев GaAs, отделенных от подложки

ДОРОГАН, В. В.; НЕГРЕСКУЛ, В. В.; ТРОФИМ, В. Г.; ЧУМАК, В. А. (Ioffe Institute, RAS, 1985)

Задачей настоящей работы являлось исследование излучательных свойств нелегированных и легированных Zn, Sn, Ge и Si слоев GaAs после их отделения о т несущей подложки, а также установление влияния промежуточного слоя ...
Катодный эффект электростимулированных химически х превращений в структурах металл-халькогенидны й стеклообразный полупроводник

ЦИУЛЯНУ, Д. И.; ЧУМАКОВ, И. С.; ГРИНШПУН, Л. Б. (Физико-технический институт им. А. Ф. Иоффе Российской академии наук, 1983)

В настоящей работе представлены результаты исследования необратимых изменений оптических свойств тонкослойных структур металл—ХСП в электрических полях, превышающих по напряженности в 10—100 раз поля, используемые ранее ...
Work function and AC operating gas-sensitive films based on quaternary chalcogenides

TSIULYANU, D.; CIOBANU, M.; LIESS, H.-D. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2016)

A study of quaternary alloys of As–S–Ge–Te was performed in order to assess their use in future gas sensors operating at room temperature. To elucidate the effect of tellurium, the quaternary compositions As2Te13Ge8S3 and ...
Tellurium Thin Films in Sensor Technology

TSIULYANU, D. (Springer Nature Switzerland, 2011)

An extensive review of the application of tellurium thin films in sensor technology is reported and discussed. Along with the traditional use of Te films in photo and strain sensitive devices, their modern application in ...
Surface Phenomena in Glassy Chalcogenides by Gas Sensing

TSIULYANU, D.; CIOBANU, M.; MOCREAC, O. (Springer Nature Switzerland, 2020)

The surface phenomena in glassy chalcogenides (GCh), including those caused by gas adsorption, are reviewed and discussed. A detailed quantitative analysis is made on experimental data taken on glassy and nanocrystalline ...
Sensing properties of tellurium based thin films to propylamine and carbon oxide

TSIULYANU, D.; MARIAN, S.; LIESS, H.-D. (Elsevier, 2002)

The effect of propylamine (C3H7NH2) and carbon oxide on electrical conductivity of tellurium based thin films has been investigated. It is shown that the absorption of the propylamine vapor leads to reversible increase of ...
Sensing Properties of Tellurium Based Thin Films to Oxygen, Nitrogen and Water Vapour

TSIULYANU, D.; STRATAN, I.; TSIULYANU, A.; EISELE, I. (IEEE, 2006)

Effect of O2 , N2 and H2O to electrical behaviour of tellurium-based films has been studied at temperatures between 20 degC and 70 degC. The increase of oxygen partial pressure in NO2 + O2 carrier gas results in a nearly ...
Sensing properties of tellurium based films to propylamine

TSIULYANU, D.; MARIAN, S.; MIRON, V.; LIESS, H.-D. (IEEE, 2001)

The effect of propylamine (C/sub 3/H/sub 7/NH/sub 2/) on electrical conductivity of tellurium based thin films has been investigated. It is shown that the absorption of the propylamine vapor leads to reversible increase ...
Room temperature a.c. operating gas sensors based on quaternary chalcogenides

TSIULYANU, D.; CIOBANU, M. (Elsevier, 2016)

Impedance spectra of quaternary As–Ge–S–Te based alloys were investigated in both dry synthetic air and mixture with nitrogen dioxide in order to assess the use of these materials in future gas sensors working at room ...
Remarks on the nature of Urbach absorption tail in glassy semiconductors

TSIULYANU, D. I.; MARIAN, S. I. (IEEE, 1995)

Exponential absorption edge of chalcogenide glassy alloys with sulfur content in the region of the topological transition is studied. It is shown that the slope of the tail (1//spl Delta/) depends on the mean coordination ...
Promovarea utilizării biocombustibililor gazoşi în Republica Moldova

ŞVEŢ, Olga (2020)

Scopul prezentei lucrări constă în dezvoltarea cadrului metodologic privind estimarea potențialului de biocombustibili gazoși, cu estimarea puterilor ce ar rezulta la nivel de raion și localitate, și determinarea prețului ...
Pictura figurativă de şevalet din RSS Moldovenească

PLATON, Liliana (2020)

Scopul cercetării constă în examinarea complexă a picturii figurative de șevalet din RSS Moldovenească prin prisma procesului evolutiv, stilistic și morfologic. În baza scopului enunțat al cercetării au fost stabilite ...
Development of Strategic Directions of Road Transport for the Republic of Moldova in the Context of European Union

GOROBIEVSCHI, Svetlana; MUNTEANU, Diana (Universitatea „Ovidius”, Constanţa, 2020)

The key principles underlying the acquis communautaire in the field of transport identify the progress made and the delays that the Republic of Moldova still has in terms of convergence towards European transport standards. ...
Creşterea calităţii transportului în Republica Moldova prin utilizarea unui sistem inteligent de monitorizare a traficului rutier

GOROBIEVSCHI, Svetlana; MUNTEANU, Diana (“Gheorghe Zane” Institute for Economic and Social Research, Iaşi, 2020)

Economic development is closely linked to the possibilities of transporting the products of economic activities and the formation of ever closer relations between different economic entities at different stages of economic ...
Impactul informatizării asupra dezvoltării turismului şi a creşterii economice

GOROBIEVSCHI, Svetlana; COLUN, Tatiana (“Gheorghe Zane” Institute for Economic and Social Research, Iaşi, 2020)

In the modern economic sphere, information technology plays an important role. Modern society is under the enormous influence of such information technologies as television, internet, mobile communications, specialized ...
Photoelectric Phenomena in Isotope Vitreous As2S3-Silicon Single-Crystal Heterojunctions

TSIULYANU, D. I.; KOLOMEYKO, E. P.; STAMOV, V. N. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 1987)

In the present note the photoelectrical phenomena in isotype heterojunctions on te basis of single-crystal p-Si and vitreous As2S3 with aluminium or chromium electrodes, were investigated. The electrical properties and the ...
Photoconductivity and optical absorption of dimorphite thin films

TSIULYANU, D.; GOLBAN, G.; KOLOMEYKO, E.; MELNIC, O. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 1996)

Optical absorption and photoconductivity of As4S3 thin films have been studied. The absorption coefficient is shown to be influenced by the technology of film preparation, in particular by growth velocity and substrate ...
Peculiarities of Ultrathin Amorphous and Nanostructured Te Thin Films by Gas Sensing

TSIULYANU, D.; MOCREAC, O.; CIOBANU, M.; ENACHI, M.; VOLODINA, G. (American Scientific Publishers, 2014)

The extinction of sensitivity to nitrogen dioxide induced by high gas concentration have been observed in ultrathin tellurium films. The phenomenon becomes apparent in both continuous and nanostructured films shown by AFM, ...
Optical absorption and thermal expansion of semiconductor glasses As-S-Ge by topological transition

TSIULYANU, D.; GUMENYUK, N.; MARIAN, S. (Society of Photo-Optical Instrumentation Engineers, SPIE, 1995)

The effect of mean coordination number r on the optical absorption in the region of exponential tail and on the thermal expansion of chalcogenide glasses As-S-Ge are presented. Several important parameters such as optical ...
Optical absorption of chalcogenide glassy photoresists As-S-Ge

MARIAN, S.; TSIULYANU, D. I. (IEEE, 1995)

The absorption edge of some chalcogenide glassy semiconductors (ChGS) As-S-Ge both in bulk and thin films is studied. The region of the Urbach tail is considered particularly as it determines the efficiency of photostructural ...

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