TY  - JOUR
AU  - Lee, H.
AU  - Park, J. S.
AU  - Kim, H.
AU  - Yoon, K. B.
AU  - Seeck, O. H.
AU  - Kim, D. H.
AU  - Seo, S. H.
AU  - Kang, H. C.
AU  - Noh, D. Y.
TI  - Characterization of molecular linkages placed between zeolite microcrystal monolayers and a substrate with X-ray reflectivity
JO  - Langmuir
VL  - 22
SN  - 0743-7463
CY  - Washington, DC
PB  - ACS Publ.
M1  - PreJuSER-57739
SP  - 2598 - 2604
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - We prepared silicalite-1 microcrystal (MC) monolayers on a Si wafer using two different types of molecular linkages, namely, through chloropropyl (CP) groups and through CP/polyethylene imine/CP groups. Whereas the scanning electron microscope images of the two MC monolayers look very much alike but hardly give any information on the nature of molecular linkage between the monolayers and the substrate, their reflectivity curves are distinctively different, despite the fact that the thicknesses of the molecular linkage layers ( approximately 10-20 A) are negligibly small compared to the thicknesses of MC monolayers, ( approximately 3200 A). On the basis of the atomic force microscopic images of the MC surfaces, a rough surface layer with the thickness of approximately 160 A was introduced onto the surface of each MC to conduct a meaningful simulation of the curves with the recursive Parratt formalism. The obtained thickness, roughness, and density of each layer were reasonable, indicating that X-ray reflectivity is a very useful tool for the characterization of very thin layers of molecular linkages existing between much thicker MC monolayers and the substrate.
KW  - Microscopy, Electron, Scanning
KW  - Spectrophotometry, Ultraviolet
KW  - X-Rays
KW  - Zeolites: chemistry
KW  - Zeolites (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:16519459
UR  - <Go to ISI:>//WOS:000236009900033
DO  - DOI:10.1021/la051856q
UR  - https://juser.fz-juelich.de/record/57739
ER  -