Group II Aleksandra Tkacz UST Lidia Proczek UST Katarzyna Michalów UST Jana Hruba’ STU Eva Kuzielova’ STU Krzysztof Burek UST ‘ ‘ Nanoparticles and Nanoparticles and biochemistry’ biochemistry’
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Group II
Aleksandra Tkacz UST
Lidia Proczek UST
Katarzyna Michalów UST
Jana Hruba’ STU
Eva Kuzielova’ STU
Krzysztof Burek UST
‘‘Nanoparticles and Nanoparticles and biochemistry’biochemistry’
1. Nanomaterials and quantum dots (QDs)
2. Biochemistry
3. Gd2O3:Tb3+@SiOx system
4. Researches
5. Summary
OutlineOutline
NanoparticlesNanoparticles
Quantum Dots (QDs)Quantum Dots (QDs)Nanometre-scale semiconductor
crystals
Quantum Dots (QDs)Quantum Dots (QDs)How it works ...
Quantum Dots (QDs)Quantum Dots (QDs)Relationship between crystal size and
colour
The smaller the size, the shorter the wavelenght
Quantum Dots (QDs)Quantum Dots (QDs)Advantages in comparison with conventional
Dyes
- QDs emit light at a variety of precise wavelenghts
- QDs can be excited by any wavelenght shorter than the one it emits
- QDs have wide range of avaible colours
- QDs are extremely stable
Quantum Dots (QDs)Quantum Dots (QDs)Ways of obtaining nanoparticles
- Sol-gel
- Plasma
- Mechanochemical
- Aerosol processing
- High-energy ball milling
- Polyol and other chemical
- Hydrothermal processing
- Other chemical and physical techniques as needed
Quantum Dots (QDs)Quantum Dots (QDs)Applications
Life scienceLife science
Controling the size and phase of semiconductor nanocrystals by biological materials (peptides, etc.)
QDs as a markers
GdGd22OO33:Tb:Tb3+3+@SiO@SiOxx [1][1]
[1] Chem. Mater. 2005, 17, 1673-1682
Double Luminescence for Double Luminescence for Biological LabelingBiological Labeling
Optical properties of GdOptical properties of Gd22OO33:Tb:Tb33
Double Luminescence for Double Luminescence for Biological LabelingBiological Labeling
- high photostability
- narrow emission bands
GdGd22OO33:Tb:Tb3+3+@SiO@SiOx x systemsystem
The role of the layer : The role of the layer :
Double Luminescence for Double Luminescence for Biological LabelingBiological Labeling
- allows the dispersion of the particles in aqueous solution without loss of luminescence intensivity
- the luminescence of polisiloxane-coated Gd2O3 nanoparticles is more intense than that in the case of the naked core Gd2O3
- in the presence of amino groups, organic dyes and biotargeting groups (nucleic acid, biotin, streptavid) were covalently linked to the polisiloxane network
Research workResearch work‘Preparation and characterization
of ZnS:Mn nanoparticles’
MaterialsMaterials
Substance Company Purity
Zinc Acetate SIGMA - ALDRICH 98%
Mangan Acetate
ROTH 98% ;)
Sodium Sulphide
RIEDEL-DE-HEAN 60 – 62 %
Cysteamin MERCK 97 %
Ethanol - Technical
Acetic Acid - Technical
Preparation route IPreparation route I
Preparation route IIPreparation route II
ResultsResults
0
10
20
30
40
1 10 100 1000
Vol
ume
(%)
Diameter (nm)
Statistics Graph (2 measurements)
Mean w ith Max-Min error bar
0
5
10
15
20
1 10 100 1000
Vol
ume
(%)
Diameter (nm)
Statistics Graph (2 measurements)
Mean w ith Max-Min error bar
a)
b)
pH=4,82
pH=4,91
ResultsResults
0
10
20
30
40
1 10 100 1000 10000
Vol
ume
(%)
Diameter (nm)
Size Distribution by Volume
Record 3: ZnS:Mn grupa 2-pH 4.91 Record 4: ZnS:Mn grupa 2-pH 4.91
0
5
10
15
20
1 10 100 1000 10000
Vol
ume
(%)
Diameter (nm)
Size Distribution by Volume
Record 77: ZnS:Mn grupa 4 -pH 4.82-2ga probaRecord 78: ZnS:Mn grupa 4 -pH 4.82-2ga proba
a)
b)
pH=4,82
pH=4,91
ResultsResults
a)
b)
0
10
20
30
40
1 10 100 1000 10000
Inte
nsity
(%
)
Diameter (nm)
Size Distribution by Intensity
Record 3: ZnS:Mn grupa 2-pH 4.91 Record 4: ZnS:Mn grupa 2-pH 4.91
0
5
10
15
20
1 10 100 1000 10000
Inte
nsity
(%
)
Diameter (nm)
Size Distribution by Intensity
Record 77: ZnS:Mn grupa 4 -pH 4.82-2ga proba Record 78: ZnS:Mn grupa 4 -pH 4.82-2ga proba
pH=4,82
pH=4,91
SummarySummary
- A wide range of future application
- QDs have better properties than conventional Dyes
- The luminescence of QDs @ SiOx systems is very intense
- It’s not difficult to obtain
luminescent nanoparticles
ReferencesReferences
1) C. Louis, R. Bazzi, C.A. Marquette, J-L. Bridot, S.Roux, G. Ledoux, B. Mercier, L. Blum, P. Perriat, O. Tillement Chem. Mater 2005, 17, 1673-1682
2) E. Klarreich Nature 2001, 413, 450-452
3) N.G. Portney, K. Singh, S. Chaudhary, G. Destito, A.Schneemann, M.Machester, M. Ozkan Langmuir 2005, 21, 2098-2103
4) C.E. Flynn, C. Mao, A. Hayhurst, J.L. Williams, G. Georgiu, B. Iverson, A.M. Belcher J.Mater. Chem. 2005, 13, 2414-2421
Related Documents
