SOLVOTERMALNA SINTEZA NANODELCEV V SISTEMU Ln-Y-B, Ln = La, Gd IN B = S, Se

Križaj, Aljaž

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Title:	SOLVOTERMALNA SINTEZA NANODELCEV V SISTEMU Ln-Y-B, Ln = La, Gd IN B = S, Se
Authors:	ID Križaj, Aljaž (Author) ID Ban, Irena (Mentor) More about this mentor... ID Lisjak, Darja (Comentor)
Files:	UN_Krizaj_Aljaz_2015.pdf (3,08 MB) MD5: 22F788EE1A2EAF3F67C4FF33BC3BEF1A
Language:	Slovenian
Work type:	Undergraduate thesis
Typology:	2.11 - Undergraduate Thesis
Organization:	FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:	Fluorescenčni nanodelci dopirani z lantanoidi predstavljajo alternativo obstoječim bio-označevalcem v fluorescenčni mikroskopiji. Pogoj za učinkovito fluorescenco je ustrezna kristalna matrica, med katere spadajo tudi halkogenidi. To delo je študija solvotermalne sinteze nanodelcev v sistemu Ln-Y-B, kjer je Ln = La ali Gd in B = S ali Se. Osredotočil sem se predvsem na sintezo nanodelcev v ternarnem sistemu La-Y-S vzporedno pa sem študiral tudi sintezo v sistemih La-Y-Se, Y-S in Gd-S. Ti materiali so bili do sedaj sintetizirani le s kristalizacijo iz taline, nikoli pa solvotermalno. Študiral sem nastanek nanodelcev z izborom različnih reagentov in njihove koncentracije ter vpliv različnih topil, temperatur in sinteznega časa. Vzorce smo karakterizirali z rentgensko praškovno difrakcijo in s presevnim elektronskim mikroskopom. S primerjavo vseh zbranih rezultatov sem ugotovil, da pri 200ºC oz. 220ºC in pri sinteznem času 15h oz. 24h nastanejo nanodelci LaYS3 in LaYSe3, vendar pa produkt ni enofazen. V zaključku predlagam smernice za izboljšanje izkoristka sinteze.
Keywords:	Solvotermalna sinteza, nanodelci, LaYS3
Place of publishing:	Maribor
Publisher:	[A. Križaj]
Year of publishing:	2015
PID:	20.500.12556/DKUM-47993
UDC:	542.913(043.2)
COBISS.SI-ID:	19082774
NUK URN:	URN:SI:UM:DK:RQ4GOTKW
Publication date in DKUM:	02.06.2015
Views:	1934
Downloads:	176
Metadata:
Categories:	KTFMB - FKKT
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Secondary language

Language:	English
Title:	SOLVOTHERMAL SYNTHESIS OF NANOPARTICLES IN THE SYSTEM Ln-Y-B, WHERE Ln = La OR Gd AND B = S OR Se
Abstract:	Fluorescent nanoparticles doped with lanthanides represent an alternative to the existent biomarkers in fluorescent microscopy. The condition for a successful fluorescence is an adequate crystal matrix, among which are also chalcogenide matrices. This is a study of a solvothermal synthesis of nanoparticles in the system Ln-Y-B, where Ln=La or Gd, and B=S or Se. I focused mainly on the synthesis of nanoparticles in the system La-Y-S; concurrently I also studied the synthesis in the systems La-Y-Se, Y-S and Gd-S. These materials have hitherto been acquired only with thermal decomposition, but never with solvothermal synthesis. I studied the formation of nanoparticles by selecting different solvents, various reagents and their concentrations, at given temperatures and synthesis times. Samples were characterized both by, X-ray powder diffraction and the transmission electron microscope. A comparison of the results revealed that at temperature of 200° C or 220° C and at synthesis time of 15 or 24 h, nanoparticles with compositions of LaYS3 and LaYSe3 formed; however, the product was not a single-phase. In the conclusion guidelines for improving the efficiency of the synthesis are proposed.
Keywords:	Solvothermal synthesis, nanoparticles, LaYS3

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