1. Full name: Phan Nguyen Duc Duoc                             2. Sex: Male

3. Date of birth: 17/08/1990                                              4. Place of birth: Thua Thien Hue

5. Admission decision number: 778/QĐ-CTSV    Dated 21/08/2017

6. Changes in academic process:

+ Adjusting supervisors and topic of the doctoral thesis followed the Decision No.
341/QD-DT, dated 04/03/2019.

+ Adjusting the title of the doctoral thesis followed the agreement of the first
doctoral thesis evaluation council, dated 11/11/2021.

7. Official thesis title: Synthesis of graphene-carbon nanotubes hybrid materials with Au, Fe3O4 nanoparticles applied to biosensors

8. Major: Nano materials and devices                              9. Code: 944012801QTD

10. Supervisors:

Supervisor 1: Assoc. Prof. Dr. Pham Duc Thang

Supervisor 2: Dr. Nguyen Van Chuc

Summary of the new findings of the thesis:

The DWCNTs-Gr hybrid material was fabricated on copper foil by thermal chemical vapor deposition method under a low-pressure ambiance. The optimal condition was DWCNTs concentration of 0.3 g/L at a speed of 4000 rpm for 1 min. The obtained material has electrical and electrochemical properties better than Gr under the same condition. The DWCNTs-Gr modified electrode was used to detect As(V) in the 1-10 ppb range with low detection limit of 0.287 ppb.

The DWCNTs-AuNPs-Gr hybrid material was successfully fabricated on copper foil by thermal chemical vapor deposition method under a low-pressure ambiance. Electrical and electrochemical properties of DWCNTs-AuNPs-Gr have been enhanced more significantly than Gr and DWCNTs-Gr. The optimal volume ratio of DWCNTs (0.3 g/L):AuNPs (0.2 mM) in solution is 1:3. The DWCNTs-AuNPs-Gr modified electrode was used to detect cholesterol in the range of 0.5-12 mM with high sensitivity of 20.7 µA/mM.cm2.

The GO/DWCNTs@Fe3O4/Cs hybrid material was successfully fabricated and applied to electrochemical biosensors by assembly method. The GO/DWCNTs@Fe3O4/Cs modified electrode has significantly improved electrochemical properties than the bare electrode. The obtained material was used to detect glyphosate in the wide range of 0.1-1000 ppb.

12. Practical applicability, if any: Our fabricated materials have potential applications to electrochemical biosensors for analyzing heavy metal ions and biomedical diagnostics.

13. Further research directions, if any:

14. Thesis-related publications:

P.V. Cường, P.N.Đ. Dược, C.T. Thanh, N.K. Như, L.T.Q. Xuân, P.V. Trình, Đ.N. Thuận, B.T.P. Thảo, P.Đ. Thắng, N.V. Chúc (2022), Vật liệu tổ hợp graphene-ống nano cácbon-hạt nano vàng: chế tạo và tính chất, Tạp chí Khoa học Đại học Huế: Khoa học tự nhiên (Accepted).

C.T. Thanh, N.H. Binh, P.N.D. Duoc, P.V. Trinh, N.N. Anh, N.V. Tu, N.V. Tuyen, N.V. Quynh, V.T. Thu, V.C. Tu, B.P. Thao, P.D. Thang, H. Abe, N.V. Chuc (2021), “Electrochemical sensor based on reduced graphene oxide/double-walled carbon nanotubes/Fe3O4/chitosan composite for glyphosate detection”, Bulletin of Environmental Contamination and Toxicology, 106, 1017 (SCIE, Q2, IF: 2,151).

P.N.D. Duoc, N.H. Binh, T.V. Hau, C.T. Thanh, P.V. Trinh, N.V. Tuyen, N.V.  Quynh, N.V. Tu, V.D. Chinh, V.T. Thu, P.D. Thang, P.N. Minh, N.V. Chuc (2020), “A novel electrochemical sensor based on double-walled carbon nanotubes and graphene hybrid thin film for arsenic(V) detection”, Journal of Hazardous Materials, 400, 123185 (SCIE, Q1, IF: 10,588).

P.N.Đ. Dược, T.V. Hậu, N.H. Bình, C.T. Thanh, L.Đ. Quang, N.P. Thảo, N.V. Tuyên, N.T. Dung, N.V. Chúc (2018), “Nghiên cứu phát triển và ứng dụng cảm biến sinh học điện hóa trên cơ sở vật liệu tổ hợp ba chiều Gr/CNTs nhằm phát hiện hàm lượng cholesterol”, Tạp chí phân tích Hóa, Lý và Sinh học, 4, 65.

P.N.D. Duoc, N.H. Binh, T.V. Hau, C.T. Thanh, P.V. Trinh, N.V. Tuyen, N.V.  Quynh, N.V. Tu, V.D. Chinh, P.N. Minh, N.V. Chuc, Transparent DWCNTs-graphene hybrid film based electrochemical sensor fer arsenic (V) detection, Proceedings of The 9th International Workshop on Advanced Materials Science and Technology - IWAMSN, 7-11 Nov. 2018, Ninh Binh, Vietnam.

P.N.Đ. Dược, T.V. Hậu, P.V. Trình, C.T. Thanh, N.V. Tú, Đ.T. An, N.T.H. Vân, N.V. Chúc, Chế tạo màng tổ hợp CNTs/graphene cấu trúc ba chiều bằng phương pháp ủ nhiệt, Kỷ yếu Hội nghị vật lý chất rắn và khoa học vật liệu lần thứ 10, 19-21 tháng 10, 2017, Thừa Thiên Huế, Việt Nam, Tr. 444

N.D.D. Phan, N.D. Nguyen, V.H. Tran, T.T. Nguyen, V.H. Nguyen (2017), “Functional integral method in quantum field theory of Dirac fermions in graphene”, Adv. Nat. Sci.: Nanosci. Nanotechnol. 8, 035018. (ESCI).

N.D.D. Phan, V.H. Tran (2017), “Functional integral method in quantum field theory of plasmons in graphene”, Adv. Nat. Sci.: Nanoci. Nanotechnol. 8, 045017. (ESCI).

N.D.D. Phan, V.H. Tran, V.H. Nguyen, T.T. Nguyen, Functional integral method in quantum field theory  of dirac fermions and plasmons in graphene, Proceedings of The 6th International Workshop on Nanotechnology and Application - IWNA, 08-11 Nov. 2017, Phan Thiet, Vietnam, pp. 25.

T.V. Hậu, P.N.Đ. Dược, P.V. Trình, C.T. Thanh, N.V. Tú, N.N. Trác, N.T. Hồng, N.V. Chúc, Chế tạo màng mỏng graphene từ đường Saccarozơ, Kỷ yếu Hội nghị vật lý chất rắn và khoa học vật liệu lần thứ 10, 19-21 tháng 10, 2017, Thừa Thiên Huế, Việt Nam, Tr. 440.