Explain the lotus effect based on contact angle. Describe two practical applications of lotus effect.
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Explain the construction and working principle of a microfluidic cantilever sensor. What is the resolution attained by such sensor?
What are surface plasmon polaritons (SPP)? State any two technological applications of SPP.
What is the difference between single domain and superparamagnetic particles? A superparamagnetic material has a characteristic time of 10-11 seconds and a Néel relaxation time of 2.0 second at 300 K.
Calculate
i) the energy barrier (in eV); and
ii) the blocking temperature if the measurement time is 120s.
Take .
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