Huang Gaoshan

Manipulation and applications of rolled-up microtubular engine

Rolled-up microtubular engines have broad application potentials in the fields of material science, chemistry, and biology due to their easy fabrication strategy and excellent physical/chemical properties. The microengines can harvest energy from surrounding environment to achieve motion at low Reynolds numbers, mimicking the biological movement in the nature. This article reviews recent progress in fabrication and motion control (including speed and direction control) of microengines, as well as their advanced applications in chemical, biomedical, and environmental sciences.

Fabrication of silicon-based flexible opticalwaveguide by edge-cutting transfer technique

Owing to remarkable advantages in flexible, portable, and large area characteristics, inorganic flexible electronics/ photonics have attracted widespread attentions and got full progresses. The key technique for fabrication of inorganic flexible electrical/optical devices is transferring nano-building blocks from conventional rigid substrates to flexible substrates in a manner of controllable, accurate, and ultrahigh alignment. This paper focused on the well-regulated transfer and deterministic assembly of these nano-building blocks onto flexible substrate during transfer printing process, and proposed edge-cutting transfer technique to fabricate and deterministically assemble silicon nanoribbon arrays on flexible substrate. Based on the beam theory and finite element model, the relationships between stress existing in suspended silicon nanoribbons and thickness and width of nanoribbons during edge-cutting transfer process are studied. Moreover, the edge morphologies of the fabricated nanoribbons are investigated with different directions of the initially defined silicon strips. And the silicon nanoribbons with sharp edges can be obtained by optimizing the defined directions of the silicon strips. Ultimately, silicon-based flexible optical waveguide was demonstrated by using the obtained silicon nanoribbon.

Development and applications of rolled-up oxide micro/nanotubes

Micro/nanotubes fabricated via self-rolled-up nanotechnology have wide potential applications in materials science, chemistry and biology due to their simple fabrication methods and splendid physical and chemical properties. Oxides, with great stability, crystal structure and optical properties, especially unique semiconductor properties, magnetic and electrical properties of some oxides, become common materials of rolled-up micro-/nanotubes. This review introduces the principles and methods of self-rolled-up micro/nanotubes fabrications, and the applications in optical resonant cavities, sensors, cell study, anodes of Li ion batteries, self-propel engines.