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ETAPA DE EXECUTIE NR. 3.<br />

SECTIUNEA 1<br />

RAPORTUL STIINTIFIC SI TEHNIC<br />

(<strong>RST</strong>)<br />

CU TITLUL Obtinerea <strong>de</strong> nanoparticule magnetice prin sinterocristalizare<br />

CUPRINS<br />

<strong>RST</strong> - Raport stiintific si tehnic in extenso*<br />

Proces verbal <strong>de</strong> avizare interna<br />

Procese verbale <strong>de</strong> receptie a lucrarilor <strong>de</strong> la parteneri<br />

Raport final <strong>de</strong> activitate (numai pentru etapa finala)<br />

I. Obiective generale 5<br />

II. Obiectivele etapei <strong>de</strong> executie 5<br />

III. Rezumatul etapei 6<br />

Descrierea stiintifica si tehnica<br />

IV. Obtinerea <strong>de</strong> nanoparticule magnetice prin sinterocristalizare 8<br />

IV.1. Introducere 8<br />

IV.2 Obtinerea <strong>de</strong> vitroceramici cu proprietati magnetice din precursori vitrosi <strong>de</strong> tip<br />

borosilicatic in ve<strong>de</strong>rea obtinerii <strong>de</strong> nanoparticule magnetice din Fe3O4, Fe2O3 9<br />

IV.3 Investigatii morfo-structurale asupra sticlelor cu proprietati magnetice 10<br />

IV.3.1. Dilatometrie 10<br />

IV.3.2. Difractie <strong>de</strong> raze X 11<br />

IV.3.3. Spectrometrie <strong>de</strong> absorbtie in infrarosu 13<br />

IV.3.4. Microscopia <strong>de</strong> forta atomica (AFM) 14<br />

IV.3.5. Spectroscopie Mössbauer 21<br />

IV.3.6. Magnetizare 22<br />

V. Sinterocristalizarea sticlelor precursoare prin tratamente termice 25<br />

VI. Cercetari preliminare privind testarea sticlelor nanoporoase ca suporturi<br />

pentru imobilizarea <strong>de</strong> substante biologic active (proteine, enzime) 32<br />

VII. Iradierea cu radiatie gama a sticlelor precursoare 35<br />

2

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