GO/CuO Nanohybrid-Based Carbon Dioxide Gas Sensors with an Arduino Detection Unit

Abstract

A gas sensor is a device that detects the presence of gases in a specific area. This research work demonstrates the effectiveness of gas sensors based on graphene oxide (GO) and copper oxide (CuO) semiconductor nanomaterials for the detection of carbon dioxide. GO and CuO were prepared by the modified Hummer’s method and precipitation method using CuCl 2 as a precursor, respectively. These materials are made into a hybrid using poly(vinyl alcohol) (PVA)/poly(vinylpyrrolidone) (PVP) polymer solutions of low concentrations and are spin coated onto the pattern-etched copper-clad substrate. The sensor is tested using a source measurement unit (SMU) to obtain the change in the resistance of the sensor in open air and in a carbon dioxide environment. The fabricated sensor with an Arduino microcontroller detection unit showed a good sensing response of 60%.

Building an Arduino-Based Open-Source Programmable Multichannel Syringe Pump: A Useful Tool for Fluid Delivery in Microfluidics and Flow Chemistry

“…And recently some articles related to the manufacture of syringe pumps have been reported in the literature. 9,26,50 Similar to the 3D printer, the heart of the syringe pump is the stepper motor and related mechanical components. With the expansion board and stepper motor driver, an Arduino board can control the motion of several stepper motors in the syringe pump at the same time.…”

“…The Arduino platform allows people to create quite impressive products in a very short period of time, and the 3D printer is a classic example of using Arduino in practice . With the aid of Arduino community, researchers have created many excellent lab-built instruments with low costs for data acquisition, analysis, and equipment control in chemical fields based on Arduino platform. ,,− A large number of Arduino-based teaching devices for chemical laboratory teaching have been developed, which greatly reduces the cost of chemistry teaching and provides a wealth of optional low-cost teaching devices for teachers engaged in chemistry laboratory teaching. ,− Moreover, based on Arduino microcontroller, chemical experiments can become more interesting, greatly expanding the teaching content and interest. − For syringe pumps, the core components are stepper motors and related mechanical parts that drive the precision movement of the syringe piston. And recently some articles related to the manufacture of syringe pumps have been reported in the literature. ,, Similar to the 3D printer, the heart of the syringe pump is the stepper motor and related mechanical components.…”