Chengqing Wang

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The directed self-assembly (DSA) of block copolymers (BCP) is an emerging resolution enhancement tool that can multiply or subdivide the pitch of a lithographically defined chemical or topological pattern and is a resolution enhancement candidate to augment conventional lithography for patterning sub-20 nm features. Continuing the development of this(More)
Background: Elimination of poverty is an important part to achieve a comprehensive well-off in China, and financial means and tool play an important role in it. Methods: This paper employs credit capitalization model and future-oriented valuation method, uses the data from leading enterprise. Results: There are some problems in current financial poverty(More)
Poly(N-isopropylacrylamide-co-sodium acrylate) copolymer brushes grafted on SiO2-coated quartz crystal surface were prepared with a surface-immobilized initiator. The collapse and swelling of the thermally sensitive copolymer brushes in water were studied with quartz crystal microbalance in situ. The frequency and dissipation changes with the temperature(More)
Holographic relaxation spectroscopy (HRS), also known as forced Rayleigh scattering (FRS), can be used to study slow translational diffusion of probes inside a polymer gel. In this study, we demonstrated that, besides the translational diffusion coefficient, a combination of temperature ramp with HRS could lead to additional information on physically(More)
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