Khảo sát tính chất động lực học của một số hạt nano bằng phương pháp tương quan huỳnh quang trên hệ đo tự xây dựng

BỘ GIÁO DỤC VÀ ĐÀO TẠO VIỆN HÀN LÂM KHOA HỌC VÀ CÔNG NGHỆ VIỆT NAM HỌC VIỆN KHOA HỌC VÀ CÔNG NGHỆ - KHẢO SÁT TÍNH CHẤT ĐỘNG LỰC HỌC CỦA MỘT SỐ HẠT NANO BẰNG PHƯƠNG PHÁP TƯƠNG QUAN HUỲNH QUANG TRÊN HỆ ĐO TỰ XÂY DỰNG LUẬN ÁN TIẾN SỸ HÓA HỌC Hà Nội – 2022 BỘ GIÁO DỤC VÀ ĐÀO TẠO VIỆN HÀN LÂM KHOA HỌC VÀ CÔNG NGHỆ VIỆT NAM HỌC VIỆN KHOA HỌC VÀ CÔNG NGHỆ - KHẢO SÁT TÍNH CHẤT ĐỘNG LỰC HỌC CỦA MỘT SỐ HẠT NANO BẰNG PHƯƠNG PHÁP TƯƠNG QUAN HUỲNH QUANG TRÊN HỆ ĐO TỰ XÂY DỰNG Chuyên ngành: Hóa lý thuyết Hóa lý Mã số: 44 01 19 LUẬN ÁN TIẾN SỸ HÓA HỌC NGƯỜI HƯỚNG DẪN KHOA HỌC: Hà Nội – 2022 LỜI CAM ĐOAN Tôi xin cam đoan kết nghiên cứu hướng dẫn PGS TS , không trùng lặp với cơng trình khoa học khác Các số liệu, kết luận án trung thực, chưa công bố tạp chí đến thời điểm ngồi cơng trình tác giả Hà Nội, ngày 20 tháng năm 2022 Tác giả luận án LỜI CẢM ƠN Tôi xin bày tỏ lịng kính trọng biết ơn sâu sắc tới PGS TS người tận tâm hướng dẫn, định hướng nghiên cứu, động viên khích lệ tạo điều kiện giúp đỡ cho tơi suốt q trình thực luận án Tôi xin gửi lời cảm ơn chân thành đến PGS TS , thầy hướng dẫn đồng thời người đồng hành ngày tháng nghiên cứu vất vả Tôi xin chân thành cảm ơn tập thể cán bộ, nhân viên phịng Hóa học Bề mặt - Viện Hóa học, đồng nghiệp nhóm Quang phổ Laser nhóm Vật lý khí - Viện Vật lý hỗ trợ, giúp đỡ, ủng hộ, trao đổi khoa học tạo điều kiện tốt cho tơi q trình thực luận án Tôi xin trân trọng cảm ơn Ban lãnh đạo Viện Hóa học, Học viện Khoa học Công nghệ – Viện Hàn lâm Khoa học Công nghệ Việt Nam cán Viện, Học viện quan tâm giúp đỡ tạo điều kiện thuận lợi cho tơi q trình học tập nghiên cứu thực luận án Tôi xin trân trọng cảm ơn Ban lãnh đạo Viện Vật lý tạo điều kiện thời gian, vật chất để hồn thành luận án Tơi xin gửi lời cảm ơn đến cô, chú, anh, chị bạn đồng nghiệp Trung tâm Điện tử học Lượng tử, Viện Vật lý quan tâm, giúp đỡ động viên thời gian thực luận án Cuối cùng, xin bày tỏ lời cảm ơn sâu sắc đến gia đình, người thân bạn bè ln dành cho tơi tình cảm chân thành, khích lệ, động viên chia sẻ với suốt thời gian thực luận án MỤC LỤC DANH MỤC CÁC KÝ HIỆU, CÁC CHỮ VIẾT TĂT i DANH MỤC CÁC BẢNG DANH MỤC CÁC HÌNH VẼ VÀ ĐỒ THỊ iii iv MỞ ĐẦU CHƯƠNG I TỔNG QUAN 1 Các hạt nano 1 Chấm lượng tử bán dẫn 1 1 Hiệu ứng giam giữ lượng tử 1 Cấu trúc chấm lượng tử 1 Tính chất quang chấm lượng tử 1 Nano silica 10 1 Cacbon nanodot (CND) 1 Nano bạc dạng lăng trụ tam giác 14 1 Ảnh hưởng kích thước hạt nano nghiên cứu y sinh 16 Phương pháp đo tương quan huỳnh quang FCS 19 Nguyên lý đo phương trình lý thuyết FCS 19 2 Các đối tượng phát quang đo đạc FCS 22 Cấu hình hệ đo FCS 23 Phương pháp FCS xác định tương tác phân tử 25 13 Hiệu ứng chống bó (antibunching) đơn phân tử đơn hạt phát quang 26 Tình hình nghiên cứu giới nước 27 Tình hình nghiên cứu giới 27 Tình hình nghiên cứu nước 30 Kết luận phần tổng quan 30 CHƯƠNG II THỰC NGHIỆM VÀ PHƯƠNG PHÁP NGHIÊN CỨU Hố chất dụng cụ thí nghiệm 32 2 Tổng hợp hạt nano 33 2 Tổng hợp nano silica 33 2 Tổng hợp cacbon nanodot 35 2 Tổng hợp nano bạc dạng lăng trụ 35 2 Tổng hợp chấm lượng tử CdTe/CdS 36 Thiết kế hệ đo đạc tương quan huỳnh quang FCS 37 Thiết kế hệ đo FCS 37 Xây dựng hệ điện tử thu nhận xử lý tín hiệu quang 38 3 Tính tốn đường tương quan thực nghiệm 41 Căn chỉnh hệ đo 41 Tương quan tán xạ SCS 42 Hiệu ứng chống bó 42 Chuẩn bị mẫu 43 Các phương pháp bổ trợ đặc trưng vật liệu 44 Phổ huỳnh quang 44 Phổ hấp thụ tử ngoại – khả kiến UV-VIS 44 Hiển vi điện tử truyền qua (TEM) 44 4 Tán xạ ánh sáng động (DLS) 44 CHƯƠNG III KẾT QUẢ VÀ THẢO LUẬN Kết xây dựng đặc trưng hệ đo FCS 45 1 Cấu hình hệ đo FCS 45 Khảo sát kích thước thể tích đo 50 3 Hệ số khuếch tán chất màu R6G 52 Ảnh hưởng thay đổi nồng độ chất màu 56 Ảnh hưởng cường độ laze 57 FCS xác định tương tác phân tử sinh học 58 3 Xác định kích thước thủy động lực học chấm lượng tử bán dẫn 62 3 Xác định kích thước thủy động lực học chấm lượng tử CdTe/CdS 62 3 Xác định kích thước thủy động lực học chấm lượng tử CdTe 65 Nghiên cứu trình khuếch tán phân tử chất màu chấm lượng tử 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KHOA HỌC VÀ CÔNG NGHỆ VIỆT NAM HỌC VIỆN KHOA HỌC VÀ CÔNG NGHỆ - KHẢO SÁT TÍNH CHẤT ĐỘNG LỰC HỌC CỦA MỘT SỐ HẠT NANO BẰNG PHƯƠNG PHÁP TƯƠNG QUAN HUỲNH QUANG TRÊN HỆ ĐO TỰ XÂY DỰNG... động lực học số hạt nano phương pháp tương quan huỳnh quang hệ đo tự xây dựng? ?? có mục tiêu: Xây dựng hệ đo tương quan huỳnh quang Ứng dụng hệ để nghiên cứu đối tượng phát quang bước đầu thử nghiệm... cứu số lượng lớn phân tử hạt Một số phương pháp quang phổ đơn hạt phát triển gần phương pháp đo tương quan huỳnh quang (FCS) Phương pháp dựa phân tích thăng giáng tín hiệu huỳnh quang phân tử hạt