Effect of nanoscale structure on interfacial energy
A bird's eye view of any folded protein shows a complex surface composed of hydrophobic and hydrophilic patches closely packed. To date little is known on the fundamental properties that such packing determines. Self-assembled monolayers (SAMs) provide a unique opportunity to generate model biological interfaces. When mixed SAMs formed on gold nanoparticle surfaces, nanoscele phase separation domains will form with sizes comparable to that of proteins. At this length scale, it has been found that the interfacial energy shows a non-monotonic dependence on composition. The sizes of hydrophobic and hydrophilic domains play an important role. We are able to tune the ligand shell organization on nanoparticle surfaces with suitable thermal processes like annealing while keeping the composition and sizes unchanged. Here we propose to use this model system to study the effect of mixed ligand gold nanoparticle surface structure on its interfacial energy. SANS is a inevitable tool since it can provide us information on organic shell around heavy gold cores, thus it can help better establish the structure-property relationship of nanoscale interfaces.
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STELLACCI Francesco; LUO Zhi; PORCAR Lionel and YANG Huayan. (2016). Effect of nanoscale structure on interfacial energy. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.8-03-876
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