In our previous studies, some approaches have been taken to get three-dimensional (3D) image for both inorganic and organic materials using FIB -ToF-SIMS technique. Of these, shave-off cross-sectioning and metal-assisted shave-off processes were predominant. In the present study, a further approach has been taken to get a 3D image through developing 3D shave-off cross-sectioning method for the generation of secondary ions. Currently used shave-off cross-sectioning method is able to provide 2D image on X-Z plane and that can be improved into 3D by using resistive anode detector through changing the optical transportation system of the secondary ions. Installation of cylindrical lens along Z-axis shows 1000 times magnification of the real image on the detector. For investigation of angular distribution of secondary ions, shape and/or angle of the shave-off cross-sectioning areas, using W-wires as model samples, was evaluated. Shave-off method exhibited the formation of a certain shape of the sample surface with 87o angle. The peak angle of the generated secondary ions was ~45o for 87o tilted samples (Si-wafer and Al-foil) and the observed secondary ion images were 2D by using a resistive anode detector. No significant change in angular distribution of the secondary ions was observed from highly roughness (Al-foil) and almost flat surfaces (Si-wafer).

Md Ahsan Habib is currently working as a Full Professor in the Department of Chemistry (Analytical and Environmental Section), University of Dhaka (Bangladesh) from where he completed his BSc (Hons) in 1991 and MSc in 1993. Dr. Habib completed his MPhil from the Department of Chemistry, Bangladesh University of Engineering and Technology in 2001. In 2004, Dr. Ahsan Habib obtained his PhD from the Department of Chemistry, Saga University (Japan) and he completed four post doctoral researches along with JSPS Invitation fellowship at five Japanese Universities in various fields in Chemistry. Prof. Habib has also worked as a visiting professor at Ningbo University and Guangzhou Institute of Geochemistry (GIG), China. Dr. Habib published 45 papers in various international journals and delivered talk at many international conferences.