Gamma-ray irradiation is a fast and efficient technique that can constructively create various defects in a controlled manner to tune materials’ functionality. In this work, zinc oxide nanorods are hydrothermally grown over flexible polyethylene terephthalate paper substrate and then irradiated with ⁶⁰Co gamma-ray source to create various defects for possible enrichment towards NO₂ gas sensing. The sensors irradiated with gamma-ray show enhanced NO₂ responses of 120%, 160%, and 185% for 500 ppb concentration at the irradiation doses of 1.5 kGy, 4.5 kGy, and 6 kGy, respectively, as compared to the pristine sensor response of 80%. Maximum response of 312% is achieved at the irradiation dose of 6 kGy for 1500 ppb of NO₂. Overall, this study confirms that the enhanced oxygen vacancies, defect concentration, and increased grain boundaries, caused by gamma-ray irradiation can eventually achieve more than two times better efficiency towards NO₂ detection at room temperature (25 ℃) on a flexible based NO₂ sensor.

伽马射线辐照是一种快速有效的技术，可以以受控方式建设性地产生各种缺陷，以调整材料的功能。在这项工作中，氧化锌纳米棒在柔性聚对苯二甲酸乙二醇酯纸基材上水热生长，然后用⁶⁰ Co γ 射线源照射，以产生各种缺陷，从而可能富集 NO ₂气体传感。与原始传感器响应相比，在 1.5 kGy、4.5 kGy 和 6 kGy 的辐射剂量下，用伽马射线照射的传感器在 500 ppb 浓度下的 NO ₂响应分别提高了 120%、160% 和 185% 80%。_{对于 1500 ppb 的 NO 2}，在 6 kGy 的辐照剂量下可实现 312% 的最大响应. 总体而言，这项研究证实，由伽马射线辐照引起的氧空位、缺陷浓度和晶界增加最终可以在室温（25 ℃）下在柔性基 NO 上实现两倍以上的 NO _{2检测效率。 2}传感器。