اميرحسين حيدريان

This research focuses on the development and application of flexible laser-induced graphene (LIG) piezoresistive pressure nanosensors for optimizing smart greenhouses. The primary objective is to create a precise and automated monitoring system for plant growth in greenhouse environments using nanotechnology. This system employs advanced nanotechnology and the Internet of Nano Things (IoNT) to collect and analyze environmental data in real-time, thereby providing optimal conditions for plant growth and enhancing agricultural productivity and quality. High-sensitivity LIG-based piezoresistive strain sensors were fabricated by forming graphene structures on a polyimide substrate using a CO2 laser, which were then transferred to a flexible polymer substrate (RTV). The electromechanical performance of the sensors was eva‎luated within a strain range of 1% to 25%. These flexible graphene nanosensors provided accurate environmental data, including plant growth rates. Microcontrollers, particularly ESP, were utilized for data collection from the pressure nanosensors and for controlling the smart greenhouse. The structure and performance of the laser-induced graphene sensors were thoroughly examined using SEM and EDS, confirming the hierarchical and porous structure of the graphene foam. The impact of pattern design on sensor sensitivity was assessed, revealing that the addition of patterns significantly increased sensitivity. The results demonstrated that the tensile nanosensors, by continuously monitoring plant growth, reduced the need for manual intervention and ensured timely adjustments, leading to improved performance and increased agricultural product quality. This approach also contributed to water conservation and reduced operational costs. Enhancing the graphene pathway and adding patterns to the sensor structure resulted in an average 50% increase in sensor sensitivity, achieving a sensitivity index (GF) of 65. Overall, the integration of tensile nanosensors and IoNT technologies has the potential to revolutionize smart greenhouse management and facilitate sustainable agriculture.

: نانو حسگر پوشيدني، (LIG)، (IONT)، كاهش مصرف انرژي، مديريت هوشمند گلخانه.

Smart environments, Nanosensors, Optimization, Greenhouses, Internet of Nano Things (IoNT)

Amirhossein Heydariyan

Dr.Sadegh Sadeghzadeh