Wireless Ammonia Gas Sensor based on P-type Porous Si: Methods, Materials and Design
Skabylov A. Abdizhalilova L. Ibraimov M. Khaniyev B. Tezekbay Y. Abdullah M. Azamat R. Toktarbaiuly O. Duisebayev T.
October 2025Engineered Science Publisher
Engineered Science
2025#37
This study investigates the 4S performance parameters (selectivity, sensitivity, stability, speed) of a porous silicon (PS)-based gas sensor and develops a portable, wireless electronic device for ammonia detection. The porous silicon layer was fabricated by electrochemically etching p-type (100) crystalline silicon using a hydrofluoric acid (HF) and ethoxyethanol electrolyte in a 1:2 volume ratio. A compact sensor module was developed, integrating a comparator circuit, Wi-Fi connectivity, a web-based monitoring platform, and the PS sensing element, fabricated using a ProtoMat E44 CNC plotter and housed in a 3D-printed PLA enclosure. The optimized sensor exhibited a high sensitivity of 42% to ammonia, surpassing responses to other gases. The system leverages an ESP32 microcontroller for real-time data acquisition, enabling remote monitoring via a custom IoT platform with email/SMS alerts for gas concentration thresholds. The results validate the feasibility of room-temperature operation, eliminating the need for heating elements while maintaining rapid response (20 s) and stability over 10 days. This work advances the development of low-power, portable gas sensors for environmental and industrial safety applications.
Environmental Impact , Hepatotoxicity , Human Health , Livestock , Neurotoxicity
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Department of Physics and Technology, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Renewable Energy Laboratory, National Laboratory Astana (NLA), Nazarbayev University, 53 Kabanbay Batyr Astana, 010000, Kazakhstan
Department of Physics and Technology
Renewable Energy Laboratory
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026