CAN THO CITY DEPARTMENT OF SCIENCE AND TECHNOLOGY
Công nghệ “Bạc”: Phát minh giúp phát hiện hóa chất có trong rau quả
Nghiên cứu sinh của ITMO cùng với các đồng nghiệp đến từ Nga, Tây Ban Nha và Singapore đã phát triển các màng cảm biến linh hoạt dựa vào các hạt nano bạc. Sáng chế mới có thể xác định sự hiện diện của dư lượng thuốc trừ sâu trên bề mặt nông sản chỉ trong vài phút. Kết quả nghiên cứu đã được công bố trên tạp chí Nanoscale.

Để tạo ra các cảm biến này, các nhà khoa học từ ITMO, Viện Ioffe, Đại học Quốc gia Singapore và Đại học Rovira i Virgili đã thêm melamine và một lượng nhỏ bạc nitrat vào đĩa Petri với một lớp gel nhỏ. Bạc nitrat nổi tiếng trong lĩnh vực y tế như một tác nhân diệt khuẩn và trong kỹ thuật nhiếp ảnh như một thành phần của các tác nhân đang phát triển. Mặc dù chất này có chứa bạc, nhưng nó tương đối rẻ và dễ tiếp cận.

Nguyên tắc hoạt động của màng cảm biến đơn giản. Một phần của nó được áp dụng cho trái cây và được làm ướt bằng cồn để tập hợp các phân tử thuốc trừ sâu trên bề mặt của màng; sau đó, màng này được đưa vào một máy quang phổ. Sự thay đổi về phản ứng quang học, đặc điểm của quang phổ trong đồ thị giúp chúng ta có thể biết được có thuốc trừ sâu trên bề mặt sản phẩm hay không.

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CAN THO CITY DEPARTMENT OF SCIENCE AND TECHNOLOGY

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