High resolution and high precision polymer nanostructures has unique chemical and physical properties, playing an important role in nano-optics, nano-photonics, and high sensitivity biological detection. This paper demonstrated a novel fabrication method of biological detection chip based on polymer nanostructures via nanoimprint lithography. High precision nanostructures such as nanopillar arrays were prepared on chip film via nanoimprint lithography. The polymer nanostructures were used to enhance adhesion to cancer cells, which is low-cost and suitable for mass production. The replication polymer was biocompatibility materials that has no effect on cells. The experiment results show that the nanopillar arrays chip can adhere lung cancer cells in the size of 10-15 μm to achieve the purpose of filtering and detecting cells. Results of the experiments show that this new biological detection chip has potential applications of cancer detection, targeted therapy, food safety testing, and environmental monitoring.
An investigation on hybrid graphene-metal structure patch antenna has been carried out in the presented paper. The microwave radiation performance of the antenna is controlled by the optical tuning characteristic of graphene. The surface conductivity of graphene is changed, when variation of chemical potential is happened which can be regulated by an exterior light field. With simulations, the S11 coefficient of antenna is changed with a maximum of 32.2 dB when the chemical potential of graphene varies from 0 eV to 1 eV. The effect of different structure parameters, such as metal radiating patch sizes and graphene film widths, on the S11 coefficient in the graphene based antenna is further analyzed by simulations. With experiments, the measured S11 coefficient decreases gradually with optical intensity increases when using communication light with the wavelength of 1550 nm as modulation light. When the optical intensity of the communication light varieties from 0 mW to 25 mW, the S11 coefficient of the microwave is changed from -18.7 dB to -19 dB and the modulation depth is 0.3 dB. The results demonstrate the proposed method is a good candidate for modulating microwave directly by communication light.
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