ICCAS OpenIR
Structure of adsorbed layers of nitrophenoxy-tailed quaternary ammonium surfactants at the air/water interface studied by neutron reflection
Huang, Xu1; Wang, Yilin1; Dong, Chuchuan2; Shen, Hsin-Hui2; Thomas, R. K.2
2008-09-01
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume325Issue:1Pages:114-121
AbstractThe adsorbed layers of N,N,N-trimethyl-10-(4-nitrophenoxy)decylammonium bromide (Phi C(10)TAB) and N,N,N',N'-tetramethyl-N,N'-bis[10-(4-nitrophenoxy)decyl]-1,6-hexanediammonium dibromide [(Phi C-10)(2)-C-6] at the air/water interface have been studied by neutron reflection. The coverage of the surfactants was obtained over the concentration range from critical micelle concentration (CMC) to CMC/100. The area per Phi C-10 TAB molecule changes from 50 +/- 3 to 390 +/- 60 angstrom(2) over this concentration range and the area per (Phi C-10)(2)C-6 molecule changes from 139 +/- 3 to 288 +/- 10 angstrom(2). The overall thicknesses (single uniform layer) of the surfactant layers at CMC are about 19 and 16 A for Phi C(10)TAB and (Phi C-10)C-6 respectively. The distributions of the C-10 chains show that the chains of both surfactants are tilted away from surface normal, with the tilt increasing in the outer part of the layer. The distribution of C-10 chains in (Phi C-10)(2)C-6 is narrower than that in Phi C(10)TAB, indicating that the alkyl chains of (Phi C-10)C-6 are more tilted. For both surfactants, the broad nitrophenoxy distribution may indicate significant positional disorder of the nitrophenoxy groups along the surface normal direction and their intermixing with alkyl chains in the adsorbed layer. (C) 2008 Elsevier Inc. All rights reserved.
KeywordNeutron Reflection Surface Coverage Adsorbed Layer Structure
DOI10.1016/j.jcis.2008.05.043
Indexed BySCI
Language英语
WOS IDWOS:000258791800014
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65234
Collection中国科学院化学研究所
Corresponding AuthorWang, Yilin
Affiliation1.Chinese Acad Sci, Inst Chem, Key Lab Colloid & Interface Sci, Beijing 100080, Peoples R China
2.Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England
Recommended Citation
GB/T 7714
Huang, Xu,Wang, Yilin,Dong, Chuchuan,et al. Structure of adsorbed layers of nitrophenoxy-tailed quaternary ammonium surfactants at the air/water interface studied by neutron reflection[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2008,325(1):114-121.
APA Huang, Xu,Wang, Yilin,Dong, Chuchuan,Shen, Hsin-Hui,&Thomas, R. K..(2008).Structure of adsorbed layers of nitrophenoxy-tailed quaternary ammonium surfactants at the air/water interface studied by neutron reflection.JOURNAL OF COLLOID AND INTERFACE SCIENCE,325(1),114-121.
MLA Huang, Xu,et al."Structure of adsorbed layers of nitrophenoxy-tailed quaternary ammonium surfactants at the air/water interface studied by neutron reflection".JOURNAL OF COLLOID AND INTERFACE SCIENCE 325.1(2008):114-121.
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