Correlating the compliance and permeability of photo-cross-linked polyelectrolyte multilayers.
Correlating the compliance and permeability of photo-cross-linked polyelectrolyte multilayers.
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DOI：
10.1021/la200229h
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发表时间：
2011-04-19
期刊：
影响因子：
--
通讯作者：
Schlenoff JB
中科院分区：
文献类型：
--
作者：
Lehaf AM;Moussallem MD;Schlenoff JB
用光敏二苯甲酮对聚丙烯酸和聚烯丙胺进行改性，制备了可光交联的聚丙烯酸多层膜。纳米压痕，使用原子力显微镜，原子力显微镜，这些和未改性的PAH/PAA多层膜被用来评估其机械性能在原位下的水性缓冲液。在所采用的条件下（和一个20纳米的AFM半径的尖端）可靠的纳米压痕，似乎是从硅基板的性能去耦，获得大于150 nm的厚度的膜。一个强大的差异，在表观模量观察到的膜终止与积极的相比，负向。以PAA封端的膜更具玻璃态，表明聚电解质的电荷匹配更好。多层膜照射长达100分钟显示出平稳和可控的模量增加，水接触角变化不大。用电化学方法测量的碘离子渗透性也以受控的方式降低
Photocrosslinkable polyelectrolyte multilayers were made from poly(allylamine), PAH and poly(acrylic acid), PAA, modified with a photosensitive benzophenone. Nanoindentation, using atomic force microscopy, AFM, of these and unmodified PAH/PAA multilayers was used to assess their mechanical properties in situ under aqueous buffer. Under the conditions employed (and a 20 nm AFM radius tip) reliable nanoindentations that appeared to be decoupled from the properties of the silicon substrate were obtained for films greater than 150 nm in thickness. A strong difference in apparent modulus was observed for films terminated with positive as compared to negative polyelectrolyte. Films terminated with PAA were more glassy, suggesting better charge matching of polyelectrolytes. Multilayers irradiated up to 100 minutes showed a smooth and controlled increase in modulus, with little change in water contact angle. The permeability to iodide ion, measured electrochemically, also decreased in a controlled fashion
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影响因子：
3.9
作者：
Akhremitchev, BB;Walker, GC
通讯作者：
Walker, GC
DOI：
10.1243/0309324011514557
发表时间：
2001-07-01
影响因子：
1.6
作者：
Korsunsky, AM
通讯作者：
Korsunsky, AM
DOI：
10.1083/jcb.200405004
发表时间：
2004-09-13
期刊：
The Journal of cell biology
影响因子：
--
作者：
Engler AJ;Griffin MA;Sen S;Bönnemann CG;Sweeney HL;Discher DE
通讯作者：
Discher DE
影响因子：
3.4
作者：
Lo, CM;Wang, HB;Wang, YL
通讯作者：
Wang, YL
影响因子：
3.4
作者：
Isenberg, Brett C.;DiMilla, Paul A.;Wong, Joyce Y.
通讯作者：
Wong, Joyce Y.