Ordering in bio-inorganic hybrid nanomaterials probed by in situ scanning transmission X-ray microscopy
| Autor: | Aleksandr Noy, David Kilcoyne, Ich C. Tran, Tony van Buuren, Michael Bagge-Hansen, Mangesh Bangar, Ramya H. Tunuguntla, Trevor M. Willey, Kyunghoon Kim, Jonathan R. I. Lee |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Nanoscale. 7:9477-9486 |
| ISSN: | 2040-3372 2040-3364 |
| Popis: | Phospholipid bilayer coated Si nanowires are one-dimensional (1D) composites that provide versatile bio-nanoelectronic functionality via incorporation of a wide variety of biomolecules into the phospholipid matrix. The physiochemical behaviour of the phospholipid bilayer is strongly dependent on its structure and, as a consequence, substantial modelling and experimental efforts have been directed at the structural characterization of supported bilayers and unsupported phospholipid vesicles; nonetheless, the experimental studies conducted to date have exclusively involved volume-averaged techniques, which do not allow for the assignment of spatially resolved structural variations that could critically impact the performance of the 1D phospholipid-Si NW composites. In this manuscript, we use scanning transmission X-ray microscopy (STXM) to probe bond orientation and bilayer thickness as a function of position with a spatial resolution of ∼30 nm for Δ9-cis 1,2-dioleoyl-sn-glycero-3-phosphocholine layers prepared Si NWs. When coupled with small angle X-ray scattering measurements, the STXM data reveal structural motifs of the Si NWs that give rise to multi-bilayer formation and enable assignment of the orientation of specific bonds known to affect the order and rigidity of phospholipid bilayers. |
| Databáze: | OpenAIRE |
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