Welcome to NEB Research Group
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Introduction

Multifunctional Nanomaterials and Nanostructures for Advanced Technolgical Applications are topics for doing fundamental and application-oriented research projects at the NEB research group. Advanced nanostructures and nanotechnological engineering are key factors for producing new innovations & international recognized quality. The NEB research group is focusing on advanced nanomaterials, nanohybrids, nanocomposites and their applications to energy and biomedical industry.

Research at NEB is based on interdisciplinary approach by covering advanced materials science, nanoscience and nanotechnology for improving technological innovation and product quality. The researchers at NEB consist of domestic research scientists and international collaborators with expertise in the different fields, our manpower will maintain our position as one of the leading research group in the field of advanced nano-technologies.

Core values at NEB are Creativity + Passion and Trust + Harmony

Research Highlights

Magnetic iron oxide-carbon nanocomposites: Impacts of carbon coating on the As(V) adsorption and inductive heating responses


Pham Thi Lan Huong, Le Thanh Huy, Hoang Lan, Le Hong Thang, Tran Trong An, Nguyen Van Quy, Pham Anh Tuan, Javier Alonso, Manh-Huong Phan, Anh-Tuan Le


Journal of Alloys and Compounds 739 (2018) 139-148

Q1, SCI, IF = 3.133


Abstract

A novel magnetic nanocomposite of iron oxide nanoparticles encapsulated by carbon layer (Fe3O4@C) was prepared by using a two-step process of coprecipitation and hydrothermal method. The iron oxide nanoparticles with an average crystalline diameter of ~20 nm was used, whereas the concentration of C was varied from 1.25 to 10% by adjusting the mass ratio of glucose as a carbon source. We found that the arsenate removal efficiency of the Fe3O4@C nanocomposite increased with increasing C concentration, reached a maximum at 1.25% C concentration, and finally decreased for further increase in the C content. The adsorption kinetics process of the Fe3O4@C nanocomposite was well fitted with both Langmuir and
pseudo-second-order kinetic models. In contrast, the heating efficiency of Fe3O4 nanoparticles was progressively reduced with increasing C content, regardless of the AC field value. Our study indicates the use of carbon as an encapsulator for iron oxide nanoparticles is very promising as an advanced absorbent for removal of environmental pollutants, such as arsenate As(V) while it is not ideal for magnetic hyperthermia based cancer therapy. 


 

Enhanced magnetic anisotropy and heating efficiency in mutli-functional maganese ferrite/graphene oxide nanostructures



Anh-Tuan Le, Chu Duy Giang, Ta Quoc Tuan, Vu Ngoc Phan, Javier Alonso, Jagannath Devkota, Eneko Garaio, José Ángel García, Rosa Martín-Rodríguez, Ma Luisa Fdez-Gubieda, Hariharan Srikanth, Manh-Huong Phan


Nanotechnology 27 (2016) 155707

Q1, SCI, IF = 3.44

Abstract

A promising nanocomposite material composed of MnFe2O4 (MFO) nanoparticles of ~17 nm diameter deposited onto graphene oxide (GO) nanosheets was successfully synthesized using a modified co-precipitation method. X-ray diffraction, transmission electron microscopy, and selected area electron diffraction confirmed the quality of the synthesized samples. Fourier transform infrared measurements and analysis evidenced that the MFO nanoparticles were attached to the GO surface. Magnetic measurements and analysis using the modified Langevin model evidenced the superparamagnetic characteristic of both the bare MFO nanoparticles and the MFO–GO nanocomposite at room temperature, and an appreciable increase of the effective anisotropy for the MFO–GO sample. Magnetic hyperthermia experiments performed by both calorimetric and ac magnetometry methods indicated that relative to the bare MFO nanoparticles, the heating efficiency of the MFO–GO nanocomposite was similar at low ac fields (0–300 Oe) but became progressively larger with increasing ac fields (>300 Oe). This has been related to the higher effective anisotropy of the MFO–GO nanocomposite. In comparison with the bare MFO nanoparticles, a smaller reduction in the heating efficiency was observed in the MFO–GO composites when embedded in agar or when their concentration was increased, indicating that the GO helped minimize the physical rotation and aggregation of the MFO nanoparticles. These findings can be of practical importance in exploiting this type of nanocomposite for advanced hyperthermia. Magnetoimpedance-based biodetection studies also indicated that the MFO–GO nanocomposite could be used as a promising magnetic biomarker in biosensing applications.

Group
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