In this research, we propose a new objective function for optimizing damping materials to reduce the resonance peak response in the frequency response problem, which cannot be achieved using existing criteria. The dynamic compliance in the frequency response problem is formulated as the scalar product of the conjugate transpose of the amplitude vector and the force vector of the loading nodes. The proposed objective function methodology is implemented using the common solid isotropic material with penalization (SIMP)

The photo-electrochemical behavior of the self-assembled monolayer (SAM) of azobenzene thiol derivatives formed on gold electrodes were investigated by cyclic voltammetry. The ester-and the amide-type derivatives of which the local position of carbonyl groups were different were synthesized and examined. Obvious redox response was only observed for both traps-isomers with which the carbonyl group is located adjacent to the azobenzene moiety. UV irradiation to these SAMs induced no obvious change in the electrochemical response. The SAMs of non-adjacent type derivatives showed almost no electrochemical response under dark condition, while the SAM of ester-type derivative showed remarkable redox response upon UV irradiation. The observations were theoretically considered with the aid of molecular orbital energy calculations.

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