Behaviour of Monolayers of 4-methylbenzenethiol Encapsulated Gold Nanoparticles and two Kinds of Poly(etyleneoxide) Derivatives on Water Surface

Öz

In this study monolayers of poly(ethyleneoxide) derivatives with gold thiol nanoparticles and lithium ions on water surface have been prepared. Surface pressure-area (Π-A) isotherms of these monolayers at the water surface has been studied. The area per molecule on water surface changes in size when gold thiol or lithium ions are added to monolayers of poly(ethyleneoxide) derivatives. Isotherm graphs of mixed monolayer using poly(ethyleneoxide) derivatives show a plateau region and a phase transition

Anahtar Kelimeler

• PEO polymers, Surface isotherms, Lithium ions, nanoparticles

Öz

Bu su yüzeyi üzerinde tek katlı tabakaları oluşturulmuştur. Bu tek katlı tabakaları su yüzeyi üzerindeki yüzey basınç – alan (Π-A) izotermleri çalışılmıştır. Poly(ethyleneoxide) türevine ait tek katlı tabakaya altın thiol nanoparçacıklar veya lityum iyonu eklendiğinde molekül başına düşen alan değişmektedir. Poly(ethyleneoxide) türevleri karıştırılarak hazırlanan tek katlı tabakanın izotherm grafiği plato bölgesi ve faz geçişi göstermektedir

Anahtar Kelimeler

• PEO polimerleri, Yüzey izotermleri, Lityum iyonları, nanoparçacıklar

Kaynakça

1. Merkoçi A., Aldavert M., Marin S., Alegret S., “New materials for electrochemical sensing V: Nanoparticles for DNA labeling”, Trends in Analytical Chemistry, 24: 341- 349, (2005)
2. [2] Zhan C., Li D., Zhang D., Xu W., Nie Y., Zhu D., “The excited-state absorption and third-order optical nonlinearity from 1-dodecanethiol protected gold nanoparticles: Application for optical limiting” Optical Materials, 26: 11–15 (2004)
3. [3] Mandal S., Phadtare S., Sastry M., “Interfacing biology with nanoparticles”, Current Applied Physics, 5: 118–127, (2005)
4. [4] P´erez-Juste J., Pastoriza-Santos I., Liz-Marz´an L.M., Mulvaney P., “Gold nanorods: Synthesis, characterization and applications”, Coordination Chemistry Reviews , in press
5. [5] Wakefield G., Dobson P.J., Foo Y.Y., Loni A., Simons A., Hutchison J.L., “The fabrication and characterization of nickel oxide films and their application as contacts to polymer/porous silicon electroluminescent devices” Semicond. Sci. Technol. ,12: 1304- 1309, (1997)
6. [6] Wakefield G., Holland E., Dobson P.J., Hutchison J.L., “'Luminescence properties of nanocrystalline Y2O3 : Eu'”, Adv. Mater. , 13: 1557- 1560, (2001)
7. [7] Salata O.V., “Applications of nanoparticles in biology and medicine” J. Nanobiotechnol., 2: 3-9, (2004)
8. [8] Johnson S.R., Evans S.D., Mahon S.W., Ulman U., “Alkanethiol Molecules Containing an Aromatic Moiety Self-Assembled onto Gold Clusters” Langmuir, 13: 51-57 (1997)

9. [9] Heriot S.Y., “Gas Sensing Properties of Gold Nanoparticles” PhD Thesis, University of Sheffield, (2003)
10. [10] Chia F., Zheng Y., Liu J., Reeves N., Ungar G., Wright P.V., “Thick lamellar textures and high ambient conductivity in de-blended mixtures of low-dimensional systems of two polymers and Li salts” , Electrochim. Acta ,48: 1939-1951, (2003)
11. [11] Bhatt D., Zheng Y., Richardson T., Wright P.V., Davis F., “Temperature-independent conductivity of Langmuir–Blodgett films of a helical polymer and its salt complex”, Thin Solid Films, 327-329: 364-368, (1998)
12. [12] Petty M. C., “Langmuir-Blodgett films an introduction”, Oxford, Cambridge University Press, (1996)
13. [13] Dias F.B., Voss J.P., Batty S.V., Wright P.V., Ungar G., "Smectic phases in a novel alkyl substituted polyether and its complex with lithium tetrafluoroborate" Macromol. Rapid. Commun. 15: 961-969 (1994)
14. [14] F.B. Dias, S.V. Batty, J.P. Voss, G. Ungar, P.V. Wright, "Ionic conduction of lithium and magnesium salts within laminar arrays in a smectic liquidcrystal polymer electrolyte" J. Chem. Soc. Faraday Trans. 92: 2599-2606, (1996)