8. Bố cục của luận án
4.3.3.Ảnh hưởng của độ ẩm đến khả năng nhận biết khí SO2
Ngoài các yếu tố đã khảo sát trên, hơi nước cũng là một thành phần quan trọng ảnh hưởng đến khả năng làm việc của cảm biến. Một số các công bố đã nhận định phản hồi của cảm biến đã giảm nhẹ khi độ ẩm tương đối tăng lên [173], [155], [174]. Trong nghiên cứu này, để xác định ảnh hưởng của độ ẩm đến đặc tính cảm nhận khí của các cảm biến, chúng tôi đã khảo sát khả năng đáp ứng của các cảm biến đối với SO2 sau bốn chu kì liên tiếp và tăng độ ẩm tương đối trong buồng đo từ 45% lên đến 60%, 70% và 80%. Hình 4.21 biểu diễn độ dịch tần số của cảm biến sử dụng thanh
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