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Precise detection of dopamine is essential in medical applications to diagnose many diseases such as Parkinson’s disease. Here, a new optical approach based on surface plasmon resonance (SPR) is presented to detect dopamine down to 50 pM. A four-layer coating structure is developed including SU8 waveguide, platinum, platinum nanoparticles, and plastic in order to reach high sensitivity and selectivity...
Based on the influence of edge effect and channel shape, two new graphene nanoribbon field effect transistors are presented being useful in high-voltage and highly sensitive optical applications. We fabricated and examined our devices under different conditions. It is seen that by choosing the proper channel shape, ionization rate and breakdown voltage could be improved compared to a normal rectangular...
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