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Vibration and acoustic characteristics of metal matrix composite - (MMC) of aluminium Silicon carbide is compared with aluminium in lower frequencies. The free and forced vibration responses of different percentage of silicon carbide are examined for different percentage of buckling temperature under uniform and non uniform temperature distribution. The results show that temperature field at higher % of buckling temperature influences the acoustic response significantly. Also it is noticed that uniform temperature field, (T(x) = Tmax) and Increase and decrease temperature fields modelled by heating at the middle of the panel (T (x) = T m a x [ 1 − a b s (1 − 2 x L) 2 ] )) temperature field affects the response significantly. Further, it is noticed in all the aspects high % of silicon carbide contributes in high stiffness and there by reduces noises at low frequencies even under different temperature field. Also from the results obtained in lower frequencies, it is found that nearly 5 to 15 dB of noise is reduced for high stiffness associated mixture of silicon carbide reinforcement in aluminium matrix. [ABSTRACT FROM AUTHOR]

This study aims the amperometric enzyme-free glucose sensing of interlayered Polyaniline nanosheets @reduced grapheme oxide (PANINS@rGO). Conductive PANINS were synthesized using in situ chemical oxidative polymerization method. The PANINS@rGO nanocomposite was prepared by the solution mixing method and as-synthesized material was fully examined using various spectroscopy and microscopy techniques. PANINS@rGO composite coated on screen-printed carbon electrode (SPCE) was studied for electrochemical behaviour for the detection of non-enzymatic glucose. The fabricated sensor matrix was tested towards detection of glucose efficacy using cyclic voltammetry (CV) and Chronoamperometry (CA) techniques in the presence of 0.1 M NaOH electrolyte in a range of 1–10 mM at an optimum working potential of 60 mV s−1. PANINS@rGO/SPCE absorbed with high sensitivity (3448.27 μA mM−1 cm−2) and excellent low detection limit (LOD) 30 nM, (S/N = 3). Furthermore, the obtained results of the proposed PANINS@rGO/SPCE fabricated a finite sensor for non-enzymatic glucose sensor. Thus this report proves the practical opportunities for the development of environmentally benign, cost effective and chemically stable electrode materials for sensors, which may be beneficial for the expansion of economically viable enzyme free electrochemical glucose sensor devices. [ABSTRACT FROM AUTHOR]