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Prof. Dr. Yong Lei


Telefon 03677 69-3748

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Ihre Position



The main research fields of our group are 3D nano-structuring, template-based surface nano-patterning, device realization (energy-related, surface plasmon resonance, gas sensor, and photocatalysis), simulation and calculation of physics of different functional nanostructures.

1. So far most surface patterns are 2D planar structures with low lateral dimension. The surface areas of these patterns are similar to those of thin films on substrates. Thus one of the most attractive features of nano-materials, extremely large surface area, is missing. Moreover, the only way to increase the pattern density of 2D surface patterns is to decrease the pattern size and spacing. All these largely limit the applications of surface nanostructures, especially in many applications where large surface area and high pattern density are desirable. Therefore, the realization of 3D nanostructures on substrates is a very important challenge in the nano-technology field, and it is the main research objective of our group.

2. The time-saving and low-cost fabrication processes of template-based methods are highly desirable for industry in fabricating different nano-devices. There are two main nano-structuring techniques in our group: anodized aluminium oxide (AAO, including ultrathin alumina membranes (UTAMs). Made by either two-step anodization or imprinted technique) and monolayer polystyrene (PS) sphere arrays. The feature size of the surface structures prepared using AAO and PS templates can be adjusted within the range of about 5-800 nm and 50 nm-10 µm, respectively, which covers a range from quantum size to nanometer size and micrometer size. Especially, the UTAM surface patterning technique provides an efficient approach to prepare large-scale ordered surface nano-patterns with well-defined structures. (For details: “Highly ordered nanostructures with tunable size, shape and properties: a new way to surface nanopatterning using ultra-thin alumina masks, Progress in Materials Science, 2007, 52, 465; “Surface patterning using templates: concept, properties and device applications, Chem. Soc. Rev. 2011, 40, 1247.)

3. The 3D nanostructures and surface nano-patterns have wide device application areas. Due to their advantageous features (such as high regularity and density, high controllability of the structural parameters, cost-effective processes), these template-prepared functional nanostructures are desirable candidate structures for the next generation of high-performance nano-devises. Now we are mainly focusing on energy-related and surface plasmon resonance devices.

4. It is extremely important to investigate the physics aspects of the different functional nanostructures, both for basic research and for device optimization. The simulation and calculation of physics of functional nanostructures are one of the main topics in our group.