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All Journal Indonesian Journal of Tropical and Infectious Disease Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Indonesian Applied Physics Letters
Adri Supardi, Adri
Physics Study Program, Faculty of Science and Technology, Universitas Airlangga, Surabaya
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health

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Journal : Indonesian Applied Physics Letters

 1 
Degradation and Corrosion of Biodegradable Metal Zn-xCa Supardi, Adri; Afifah, Miftachul Nur; Rudyardjo, Djony Izak
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Indonesian Applied Physics Letters - Desember 2020
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23444

Abstract

Zn-based biodegradable metals (BMs) are considered as new potential in osteosynthetic implant devices. In this study Ca, which acts as an essential element in the human body, is used to improve the rate of Zn degradation and corrosion. The alloy was synthesized using the powder metallurgy method with two different processes: cold pressing followed by sintering (CP-S) and hot isostatic pressing (HIP). Microstructure properties, as well as in vitro degradation and corrosion were studied to determine the effect of adding Ca. Variations in the sample consist of Zn-0.5Ca, Zn-1Ca, Zn-1.5Ca and Zn-2Ca. The results and analysis of test data show that the addition of Ca increases the rate of corrosion and degradation of the materials. Better bonding and microstructure properties are obtained in Zn-2Ca samples which form CaZn13 phases and small porosity. As for the HIP process, a better microstructure is obtained compared to CP-S.
Ab Initio Molecular Dynamic Study of Structural and Electrical Properties of Gold Nanoparticle Fuad, Abdullah Aufa; Zaidan, Andi Hamim; Supardi, Adri
Indonesian Applied Physics Letters Vol. 3 No. 1 (2022): Indonesian Applied Physics Letters - June 2022
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v3i1.40259

Abstract

The goal of this research is to know structural and electrical properties of gold nanoparticle (GNP) through ab initio molecular dynamic (AIMD) method. Structural properties are explained by the study of coordination number, bond angle distribution, and radial distribution function. Electrical properties are explained by the study of band structure and density of states. GNP samples used in this research are liquid, amorph, and icosahedral. The main software used for AIMD numerical calculation was SIESTA. Liquid GNP is dominated by coordination number of 9, amorf GNP 10, icosahedral GNP 18. Bond angle distribution of liquid GNP has 1 peak in 60o, amorph GNP has 4 peak in 60o, 90o, 120o, 175o, icosahedral GNP has complete all 6 peak. Internal spacing of liquid GNP is 2,7 í…, amorph is 2,8 í…, icosahedral is 1,9 í…. Study of band structure show that the width of liquid GNP bandgap is 0,040 eV, amorph is 0,071 eV, icosahedral is 0,200 eV. While the width of bandgap by density of state study for liquid GNP is 0,053 eV, amorph is 0,085 eV, icosahedral is 0,200 eV.
Effect of Nitrogen-Based Ion Implantation on The Characteristics of 316L Stainless Steel for Implant Materials Rudyardjo, M.Si., Drs. Djony Izak; Ikhsan, Firman Maulana; Supardi, Adri
Indonesian Applied Physics Letters Vol. 3 No. 2 (2022): Indonesian Applied Physics Letters - December 2022
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v3i2.40951

Abstract

The effect of nitrogen-based ion implantation on the characteristics of 316l stainless steel for implant materials has been performed. This study aims to determine the effect of variations in implantation energy on the characteristics of the surface mechanical properties, density, and corrosion resistance of 316L stainless steel. The 316L stainless steel plate was implanted with nitrogen ions with an optimum dose of 5 x 1016 ions/cm2 for various implantation energies of 70, 75, 80, 85, and 90 keV. The implanted samples were then characterized by density, hardness, corrosion resistance, and microstructure tests using SEM-EDX. The test results showed an increase in hardness and corrosion resistance in pieces implanted with nitrogen ions and reached the optimum point at an implantation energy of 80 keV. This was also supported by the results of the SEM-EDX analysis, which showed an addition of nitrogen content from the maximum limit of the ASTM 2000 standard for 316L stainless steel of 0.1% to 2.2%. Whereas in the density test, the density of the material tends to be constant at the energy variations carried out but has increased after implantation.
Co-Authors Afifah, Miftachul Nur Amadea Kurnia Nastiti, Amadea Kurnia Aminatun Aminatun Andi Hamim Zaidan Arifianto, Deny Djony Izak Rudyardjo Djony Izak, Djony Izak Endah Purwanti Fuad, Abdullah Aufa Ikhsan, Firman Maulana Imam Sapuan Jan Ady Nuril Ukhrowiyah Rochman, Mochammad Nurur S Siswanto Solly Aryza