Here the work approaches the detection of fruit maturity level. In addition, a gas sensor is proposed to obtain better sensitivity to know the level of ethylene gas released from matured fruit. Better sensitivity can be achieved by obtaining an enhanced active area, changing the intermediate layer thickness and the pitch value of the electrode. Hexagonal nanostructured zinc oxide is used as a sensing layer. Finally, frequency shift and a total displacement of the device are increased. The hexagonal structured ZnO nanorod-based surface acoustic wave gas sensor may be used to detect ethylene gas in fruit ripening sensor with enhanced sensitivity. This paper reports a simulation of Surface Acoustic Wave (SAW) wave propagation with respect to interdigitated transducer (IDT), piezoelectric material and sensing layers.

An unexpected outbreak of pneumonia of unfamiliar aetiology in Wuhan,Hubei, China was reported in December 2019. World Health Organization identified the pathogen and named it COVID-19. COVID-19 madethe world go through a cisis. The impact of this viral disease is now an issue of major concern. Respiratory infections, dry cough with fever are the major symptoms which are due to beta coronavirus, namely Severe Acute Respiratory Syndrome corona virus 2 (SARS-CoV-2). Within a short spell, COVID-19 spread all over China. Since January to today 24 March 2020 this epidemic turned into pandemic with continuous rise of cases and deaths. Italy, Germany, Spain, USA, Iran, France are the countries where the disease is spreading in a community level and rest of the countries over the globe the positive cases are also comingin.  As the disease is communicable, it is highly necessary to take measures before it starts spreading in countries like India where the population is very high. The treatment of this severe acute respiratory syndrome corona virus 2 is not clear so far. Prevention is the only way to stop spreading this fatal disease. In view of this, the total state of knowledge regarding COVID-19 and the suggestive prevention are discussed by considering countries (considering India) where the population is high and this pandemic has just started spreading.