is a typical ERD spectrum of yield vs. energy of P(d-S-b-d-MMA) block copolymer chains that segregated at the interface of the PS and PMMA homopolymers. This profile can then be converted to volume fraction versus depth after doing several mathematical operations to obtain figure 20. In the figure 20 shown, the shaded region is the interface excess. The PS phase is located at x<0 whereas the PMMA phase is located at x>0. Please refer to the source to obtain complete analysis of the figure. Thus the authors were able to see that copolymer chains segregate to the interfacial region between the PS and PMMA homolymer phases and elevated temperatures while others remain in bulk. Similar studies can be easily done using the technique of ERDA The profile that lies in the energy range between 600 and 1000 keV is the hydrogen from the homopolymers and the other profile, which lies between 1000 and 1400 keV, is that of the deuterium from the copolymer chains. Ion implantation is one of the methods used to transform physical properties of polymers and to improve their electrical, optical, and mechanical performance. Ion implantation is a technique by which the ions of a material are accelerated in an electrical field and impacted into a materials such that ion are inserted into this material. This technique has many important uses. One such example is the introduction of silver plasma into the biomedical titanium. This is important because Titanium-based implantable devices such as joint prostheses, fracture fixation devices and dental implants, are important to human lives and improvement of the life quality of patients. However, biomedical titanium is lack of Osseo integration and antibacterium ability. Plasma immersion ion implantation (PIII) is a physical technique which can enhance the multi-functionality, mechanical and chemical properties as well as biological activities of artificial implants and biomedical devices. ERDA can be used to study this phenomenon very effectively. Moreover, many scientists have measured the evolution of electrical conductivity, optical transparency, corrosion resistance, and wear resistance of different polymers after irradiation by electron or low-energy light ions or high-energy heavy ions. Electronic devices are usually composed of sequential thin layers made up of oxides, nitrides, silicades, metals, polymers, or doped semiconductor–based media coated on a single crystalline substrate (Si, Ge or AsGa). These structures can be studied by HI-ERDA. This technique has one major advantage over other methods. The profile of impurities