On the distribution of hydrophilic polyelectrolytes and their counterions around zwitterionic micelles: the possible impact on the charge density in solution

Soft Matter ◽  
2021 ◽  
Author(s):  
Massimo Mella ◽  
Andrea Tagliabue ◽  
Lorella Izzo

Despite the neutrality of headgroups, polyanions impact on ion distributions inside zwitterionic micelle corona acting as “shuttle” for species with opposite charges. Hydrophilic polyanions, however, do not reduce the critical micellar concentration.

Author(s):  
S. Ritchie ◽  
J. C. Bennett ◽  
A. Prodan ◽  
F.W. Boswell ◽  
J.M. Corbett

A continuous sequence of compounds having composition NbxTa1-xTe4; 0 ≤ x ≤ 1 have been studied by electron diffraction and microscopy. Previous studies have shown that the end members of the series, TaTε4 and NbTε4 possess a quasi-one-dimensional character and exhibit charge density wave (CDW) distortions. In these compounds, the subcell structure is tetragonal with axes (a × a × c) and consists of the metal atoms (Nb or Ta) centered within an extended antiprismatic cage of Te atoms. At room temperature, TaTε4 has a commensurate modulation structure with a 2a × 2a × 3c unit cell. In NbTε4, an incommensurate modulation with × ∼ 16c axes is observed. Preliminary studies of the mixed compounds NbxTα1-xTε4 showed a discontinuous jump of the modulation wave vector commensurate to incommensurate when the Nb dopant concentration x, exceeded x ≃ 0.3, In this paper, the nature of the compositional dependence of is studied in greater detail and evidence is presented for a stepwise variation of . This constitutes the first direct evidence for a Devil's staircase in CDW materials.


1995 ◽  
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1999 ◽  
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H. Fukuyama

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-129-Pr10-132 ◽  
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1999 ◽  
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M. A.H. Dohmen ◽  
H. S.J. van der Zant

2004 ◽  
Vol 114 ◽  
pp. 149-151 ◽  
Author(s):  
Kyuya Yakushi ◽  
Mikio Uruichi ◽  
Hiroshi Yamamoto ◽  
Reizo Kato

2004 ◽  
Vol 114 ◽  
pp. 135-136 ◽  
Author(s):  
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K. O'Neill ◽  
H. S.J. van der Zant ◽  
R. E. Thorne

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Author(s):  
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Z. Z. Wang

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