NGHIÊN CỨU CHẾ TẠO VÀ KHẢO SÁT ĐẶC TÍNH CỦA MỰC IN DẪN ĐIỆN NỀN GRAPHENE

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Tác giả: Thanh Bình Đặng, Văn Thiết Dương, Anh Đức Nguyễn, Đình Dũng Nguyễn, Tuấn Hồng Nguyễn, Gia Phong Phương, Duy Đạt Vũ

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2024

Mô tả vật lý: tr.180

Bộ sưu tập: Metadata

ID: 380598

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Conductive printing ink based on graphene nanomaterial possesses many outstanding features such as high conductivity, light weight, and durability in the environment, therefore it has the potential to replace precious metal-based inks such as gold and silver in electronic devices and sensors. In this report, we fabricate graphene nanosheets from graphite paper by electrochemical exfoliation technique. The results of scanning electron microscopy (SEM) and atomic force microscopy (AFM) show that the graphene sheets in the ink have the area of 1 - 2µm and a thickness of 5 - 7nm. The solution consists of water and 1% by weight of the surfactant Polyvinylpyrrolidone (PVP) used as a solvent for the graphene-based ink, PVP acts as a binder as well. A homogenous viscous mixture is formed after 1 hour of ultrasonication combined with stirring. With a concentration of ~60mg/ml, the fabricated graphene ink can be dispersed stably for 2 months. The ink has a conductivity of 2.103S/cm, strong adhesion to the mica and glass. In addition, the dependent of the conductivity on the temperature treatment (from 100 to 400oC) was also investigated.Mực in dẫn điện nền vật liệu graphen sở hữu nhiều tính năng ưu việt như độ dẫn cao, nhẹ, bền trong môi trường do đó nó có tiềm năng thay thế các dòng mực in nền kim loại quý như vàng, bạc, trong các mạch điện tử, thiết bị cảm biến. Trong báo cáo này, chúng tôi nghiên cứu chế tạo các tấm graphen dễ phân tán trong dung môi gốc nước từ nguyên liệu giấy graphit bằng phương pháp bóc tách điện phân. Các kết quả nghiên cứu hiển vi điện tử quét (SEM) và hiển vi lực nguyên tử (AFM) cho thấy các tấm graphen trong mực in có bề rộng khoảng 1 - 2µm và bề dày 5 - 7nm. Dung dịch gồm nước và 1% khối lượng chất hoạt động bề mặt Polyvinylpyrrolidone (PVP) được sử dụng làm dung môi cho mực in nền graphen chế tạo được, PVP cũng đồng thời đóng vai trò là chất kết dính. Một hỗn hợp đồng nhất dạng lỏng sệt được tạo thành sau khoảng 1 giờ siêu âm kết hợp cùng khuấy trộn. Với nồng độ ~60mg/ml, mực in graphen chế tạo được có thể phân tán ổn định trong 2 tháng. Mực in có độ dẫn 2.103S/cm, bám dính chặt lên đế mica và kính. Ngoài ra, sự thay đổi độ dẫn theo điều kiện xử lý nhiệt (từ 100 - 400oC) cũng được khảo sát.

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