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Interfacial liquid-state surface-enhanced Raman spectroscopy
Assembly of functional colloidal nanoparticles has many technological applications, but its three-dimensional realization remains challenging. Kim et al.report a spontaneous self-orientation of gold nanorods at an oil/water interface and use it to amplify signal in surface-enhanced Raman spectroscopy.
- Kihoon Kim
- , Hye Soo Han
- & Taewook Kang
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| Open AccessEffective localized collection and identification of airborne species through electrodynamic precipitation and SERS-based detection
Effective collection of molecules on a small sensing area is not possible based on diffusion alone and the employment of a directed force is required. The authors report a localized electrodynamic precipitation concept to collect, spot and detect airborne species in an active-matrix array-like fashion.
- En-Chiang Lin
- , Jun Fang
- & Heiko O. Jacobs
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Electrografting of calix[4]arenediazonium salts to form versatile robust platforms for spatially controlled surface functionalization
The spontaneous adsorption of alkanethiols is widely utilized to fabricate functional surfaces but gives limited stability and regularity. Mattiuzziet al. report a method that uses preorganized platforms (rigid tetrapodant calix[4]arenes), which allows further surface functionalization and spatial control.
- Alice Mattiuzzi
- , Ivan Jabin
- & Corinne Lagrost
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Control of electronic conduction at an oxide heterointerface using surface polar adsorbates
The interfaces between complex oxides can play host to a range of interesting electronic phenomena. Xieet al. demonstrate that the electronic properties at the LaAlO3/SrTiO3interface can be tuned upon application of common polar solvents such as acetone, ethanol and water.
- Yanwu Xie
- , Yasuyuki Hikita
- & Harold Y. Hwang
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Imaging oxygen defects and their motion at a manganite surface
Oxygen diffusion processes are critical for the catalytic action of manganites but a full understanding of these processes is elusive. The authors perform atomic resolution scanning tunnelling microscopy imaging of layered manganites and show oxygen and defect dynamics on these surfaces.
- B. Bryant
- , Ch. Renner
- & G. Aeppli