Indonesia Conference Directory

Corresponding Author
Ganesha Antarnusa

Institutions
Department of Physics Education, Universitas Sultan Ageng Tirtayasa, Indonesia

Abstract
Polyethylene glycol (PEG) coated magnetite Fe3O4 nanoparticles has been successfully shyntesized by using chemical co-precipitation method with variation concentrations. The magnetite Fe3O4 nanoparticles used as a bimolecular labels (nano-tags) exhibiting a soft magnetic behavior with Ms of 77.16 emu/g and Hc of 49 Oe respectively and polyethylene glycol (PEG) as a stabilizer and dispersant. XRD patterns and transmission electron microscopy (TEM) images showed that Fe3O4 was well crystallized and it grew in their inverse spinel structure with an average size of around 10 nm. Fourier transform infrared spectroscopy (FT-IR) results suggest that PEG indicated with Fe3O4 via its carbonyl groups. Result of Vibrating Sample Magnetometer (VSM) shows that Fe3O4 have exhibited good magnetic response and easily attracted to a magnet placed beside with superparamagnetic behavior. Such Fe3O4 nanoparticles with favorable size and tunable magnetic properties are promising biosensor applications.

Keywords
Polyethylene glycol (PEG); magnetite Fe3O4 nanoparticles; chemical co-precipitation

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/2HjrVALWMdfD

Corresponding Author
Eva Marlina Ginting

Institutions
1 Department of physics, Universitas Negeri Medan,Indonesia
2 Faculty of Engineering ,Universitas Quality ,Indonesia
3Department of physics, Universitas Quality Berastagi ,Indonesia

Abstract
The study aimed to determine the effect of the addition of carbon black (CB) and Palm Empty Bunch Powder (OPBEP) as a filler in natural rubber compounds on thermal and transmittance properties. The composting method is done at the Open mill. The process of mixing natural rubber with additives, curative agents, activators, accelerator materials, and nano OPBEP and CB with variations (0.2; 4; 6; 8)% wt. The results of the study were obtained. FTIR results from the compound with CB and OPBEP fillers as a whole showed almost the same results. This is due to modifications so there is a possibility of overlapping with the uptake on other bands. There is a peak of 2912 C – H asymmetric symmetric stretching vibrations of octadecylamine, respectively. Bending vibration of C – H in the = CH group of 3,4- or 1,2-units. The thermal properties of the DSC thermogram obtained an increase in the melting point and cross-linking with an increase in the content of the OPBA element compared with no filler as well as the CB In general, a compound with OPBEP filler and CB can be used as a technical product that has more mechanical properties.

Keywords
: OPBEP, CB, natural rubber compounds, Thermal properties

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/6YfVpANUWJbX

Corresponding Author
Makmur Sirait

Institutions
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Indonesia

Abstract
Nano-hydroxyapatite had been synthesized by the basic ingredients of limestone using an alkaline precipitation method. Hydroxypatite synthesis was done by using H3PO4 0.3M solvent as a source of phosphate and NH4OH 1M as pH controller. The hydroxyapatite powder obtained was characterized by XRD, SEM and FTIR. The XRD test was done to determine the constituent compounds and the crystalline hydroxyapatite that had been made. From the results of the characterization of XRD powder had been formed into Calcium phosphate hydroxide (Ca10H3O27P6) compound or hydroxyapatite with hexagonal crystal form. The nanocrystalline size of the limestone hydroxyapatite powder was 66.05 nm. The SEM test was done to determine the pore size and Ca/p ratio of the limestone hydroxyapatite that had been made. From the SEM morphology test, the pore size obtained was 64.43 nm and the Ca /p ratio was 1.25.

Keywords
Hydroxyapatite; Limestone; XRD; SEM; FTIR

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/Ma4hkZHQ7R6f

Corresponding Author
Nurdin Siregar

Institutions
Faculty of Mathematics and Natural Sciences
Medan State University
Email: nurdinfis[at]gmail.com

Abstract
Magnesium (Mg) doped ZnO Thin Film has been successfully synthesized using the sol-gel spin coating method. The materials was used in this research is zinc acetate dehydrate, magnesium, isopropanol and diethanolamine as the precursor material, doping, solvent and stabilizer. Magnesium (Mg) doped ZnO thin films with a variation of 0.5; 1,0; 1,5; 2.0 and 2.5% were deposited on the FTO conductive glass subtraction. The results of ZnO: Mg thin film characterization with XRD showed all hexagonal wurtize crystal structures with the smallest crystal size of 24 nm for 0.5% doping and 28 nm maximum for 2.5% Mg doping. The results of SEM characterization showed the morphology of ZnO: Mg thin films in the form of globular granules and almost uniform. The results of ZnO thin film characterization: with UV-Vis showed the greatest transmittance and absorbance values in the wavelength range of 350 nm to 400 nm.

Keywords
ZnO thin films, Magnesium (Mg), Sol-gel Spin Coating.

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/HU6NhPL8Gtcd

Corresponding Author
Karya Sinulingga

Institutions
Universitas Negeri Medan

Abstract
This research Which was conducted to determine the best coatings on ferrous metals to prevent corrosion by using sol gel spin coating method. TiO2 coating material which is used the addition of epoxy resin binder. The comparison used in these TiO2 coatings: resin: hardener is 1:4:4. The process of synthesis TiO2 main materials used are TiCl3, distilled and NH4OH. From mixing these materials will be obtained precipitate and then the precipitate dried at a temperature of 200 °C for 6 hours to obtain titanium powder. This coating is done by varying the temperature of 100 °C, 125 °C, 150 °C for 1 hour with rotation speed of 3500 rpm. Crystal structure testing by using the XRD where known that the crystal structure formed the anatase phase. Testing the morphological structure were performed using SEM which produce images of TiO2 cubic shape. Testing the corrosion rate showed that the coated samples is more resistant to corrosion than the uncoated samples. The rate of corrosion on metal samples without coating is 40.0320 cm/year, while the rate of corrosion on metal coated sample was 2.8420 cm/year; 3.2440 cm/year; 3.5020 cm/year. Where each temperature is 100 °C, 125 °C, 150 °C

Keywords
TiO2, Corrosion rate

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/W6v3heTyg2kw

Corresponding Author
Djoko Hadi Prajitno

Institutions
Center for Nuclear Science and Technology Application

Abstract
The corrosion behavior on commercial stainless steel SS 304 in nanofluids water-Al2O3 system at pH 3 until 7 conditions have been investigated using electrochemical methods. The electrochemical tests were performed with and without the addition chlor to adjust of pH nanofluid condition, which are acidic (pH 3.2,4, 5.6) and neutral (pH 7) at ambient temperature. The electrochemical technique used in this study, were open circuit potential (OCP), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results of open circuit potential tests showed that the corrosion potential (Ecorr) values of stainless steel 304 at four pH values are slightly different between pH neutral and acidic. The chromium oxide (Cr2O3) film formed on stainless steel is more stable in neutral than in acidic with the presence of Cl. This shows that the interaction between nanofluids and the stainless steel have no significant effect onto its corrosion behavior. However, potentiodynamic polarisation of stainless steel SS 304 in nanofluid with the absence of Chlor showed the lowest corrosion than stainless steel at condition in acidic pH. Eis study shows that stainless steel SS 304 in nanofluid with the absence of Chlor (neutral) showed the higher impedance than stainless steel at condition in acidic pH. The higher impedance indicated that the passive film of Cr2O3 formed on the surface of stainless steel. In terms of corrosion rate values, stainless steel alloy showed the best corrosion rate in neutral pH nanofluid compare acidic pH.

Keywords
SS 304,corrosion ,Nanofluid,Al2O3,acid, neutral

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/cWb7vhN4txa9

Corresponding Author
Hariyati Lubis

Institutions
University of Amir Hamzah, Medan, Indonesia, 20219

Abstract
Coconut Shell actived Nanocarbon to Lightweight Concrete have done. LWC mixture of CS actived nanocarbon fillers made by mixing PPC cement, sand, broken stone, coconut shell actived nanocarbon fillers and water in various proportions. The ratio of CS actived nanocarbon on filler used ( x = 0%, 5%, 10%, and 15%), with the aim of getting a different level of compressive strength testing. The particle size of activated CS carbon using the high temperature physical activation method 800C and chemistry (immersion of ZnCl2 solution) has an average diameter of 4,842.8 nm. The SEM shows that high porosity occurs and the shape is not homogeneous. EDS analysis to determine the composition of the elements in the sample is known that the CS activated carbon samples have a maximum value in the element Carbon, Oxygen. The sample of CS actived Nanocarbon to LWC x= 0% ,the results of the maximum value of % mass and % atom are the elements Oxygen, Carbon, and Calcium. For x = 10% the maximum value are the elements Oxygen, Carbon, and Silicon. The value of the strength of the objects in the CS activated carbon filler concrete sample (x= 5%) has maximum strength value 12.9 Mpa

Keywords
Coconut Shell, Nanocarbon, Lightweight

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/bvdgGPtYQZmN

Corresponding Author
Dani Gustaman Syarif

Institutions
Center for Applied Nuclear Science and Technology (PSTNT)-BATAN
Jl. Tamansari 71, Bandung 40135, Indonesia
Telp. 62-22-2503997, Fax: 62-22-2504081
Corresponding author email: danigus[at]batan.go.id

Abstract
Water is widely used as a heat carrier in various devices such as automotive and nuclear reactors. Because of its better thermal characteristics, currently nanofluid is a candidate for replacing water and other conventional cooling fluids such as ethylene glycol and oil as a heat carrier. In this study, Al2O3 nanoparticles have been synthesized by the hydrothermal method for heat transfer nanofluid as an alternative to the new cooling fluid. Nanoparticles were synthesized using AlCl3 as a precursor, and urea was used as a capping agent. The hydrothermal process was carried out at 175oC for 17 hours. The hydrothermal product was dried and then calcined at 500oC for 1 hour. The resulting Al2O3 nanoparticles were analyzed using XRD, FTIR, and TEM. Nanofluids were prepared from these nanoparticles by dispersing them into the water as a base fluid. Nanofluid characterization was carried out through Critical Heat Flux (CHF) measurements. According to the XRD data, the Al2O3 nanoparticles produced were gamma-alumina with a crystallite size of 4 nm. The BET specific surface area was 302 m2/g. From the TEM image, it was known that the nanoparticles formed a cluster of rod-shaped particles. FTIR data shows the presence of OH groups on the surface of the nanoparticles. The Al2O3 nanofluids made were known to be stable with an average zeta potential of 54 mV. Compared to water, the CHF enhancement of this nanofluid increased by 111%. The nanofluid has the potential to be used as a cooling fluid for ECCS, RVCS, refrigeration, and metal machining process.

Keywords
Hydrothermal, Al2O3, nanofluid, Critical Heat Flux, heat transfer

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/CxgKP9qp7V82

Corresponding Author
Pradita Ajeng Wiguna

Institutions
(a) Department of Physics, Faculty of Mathematics and Science, Universitas Indonesia, Indonesia
pradita.ajeng[at]ui.ac.id
*cuk.imawan[at]sci.ui.ac.id

Abstract
Silver nanoparticles are widely studied because of their superior properties so they are widely used in various applications. Structural modification with the right synthesis method is key to obtaining superior properties of silver nanoparticles. In this experiment, gamma irradiation methods have been used to synthesize silver nanoparticles. This method has been carried out using a solution of AgNO3 metal salt with different molarities, namely 1, 10, 100 and 1000mM then for each molarity were placed in a solution of polyvinyl alcohol (PVA). The irradiation process was carried out in the cobalt-60 gamma source chamber at doses from 0 to 20kGy with a dose rate of 4.84kGy/h. This process results in a deep yellow Ag/PVA colloid nanoparticles. Increasing the molarity of the AgNO3 causes a decrease in the gamma dose applied. The properties and structure of Ag/PVA nanoparticles were characterized using UV-Vis spectrophotometer, Particle Size Analyzer and Transmission Electron Microscopy. The optical absorption spectra of Ag/PVA nanoparticles were measured using UV-Vis spectrophotometer and showed that the absorption peak was observed at wavelengths of 421-409nm. The absorption intensity increases with increasing gamma dose and reaches the maximum value at a dose of 10kGy. The resulting Ag/PVA nanoparticles have a size below 50nm. The results of the PSA and TEM analysis showed that Ag/PVA nanoparticles show increased stability because of the role of PVA in the synthesis process.

Keywords
Gamma irradiation; polyvinyl alcohol; silver nanoparticles

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/jhpFt9nW7Lfr

Corresponding Author
Nurdin Bukit,M.Si

Institutions
1Department of physics, Universitas Negeri Medan,Indonesia
2Faculty of Engineering ,Universitas Quality ,Indonesia
3Department of physics, Universitas Quality Berastagi ,Indonesia
coresponding author * : nurdinbukit5[at]gmail.com

Abstract
Abstract. This study aims to determine the mechanical properties of natural rubber compounds with variations of OPBA nanoparticle fillers and carbon black. Preparation methods for natural rubber compounds using Open Mill. Indonesian rubber standard -20 (SIR-20) mixed with anti-oxidants, activators, curing agents, accelerators and OPBA nanoparticle fillers size 56.31 nm and commercial Carbon black type (N330) with variations (0,2,6,6 and 8)% wt. The results showed that tensile strength increased with the increase in the composition of OPBA nanoparticles and carbon black, as well as the elongation of break and hardness. The best composition of OPBA filler 8% wt showed a hardness of 52 Shore A, a tensile strength of 1.7 MPa, an elongation of break 150%. The best composition of carbon black 8% wt filler with a hardness of 55 Shore A, a tensile strength of 2.5 MPa, elongation breakdown of 140%

Keywords
OPBA, Carbon black,Natural Rubber Compounds

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/BtEcm7hMzRWb

Corresponding Author
Erfan Handoko

Institutions
a).Dept of Physics. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia
*) erfan[at]unj.ac.id
b).Dept. of Physics. Syiah Kuala University. Banda Aceh. Indonesia
c).Dept. of Physics, Universitas Negeri Malang, Jl. Semarang 5, 65145 Malang, Indonesia
d).Dept. of Electrical Engineering. Universitas Mercu Buana. Jalan Meruya Selatan No.1 Jakarta. Indonesia.

Abstract
In order to study a new microwave absorbing ability, magnetic materials of BaFe12O19 and BaFe10CoZnO19 were synthesized by ceramic method. Microwave absorbing ability of multi nanolayer absorbers, composed of BaFe12O19 and and BaFe10CoZnO19 with a layer thickness of 25 nm, 50 nm, 75 nm, 100 nm, 200, nm, 300 nm, 500 nm and 1000 nm were characterized at room temperature using vector network analyzer (VNA) Rohde‐Schwarz ZVA 67 to measure the reflected signal (S11) and transmitted signal (S21) for 7 – 13 GHz frequencies. Reflection loss (RL) of multi nanolayer magnetic materials were calculated and simulated using the transmit line theory. the microwave absorption abilites were enhanced for multilayer structure due to the combination of nano layers. The optimal absorption ability was achieved with less than − 30 dB (i.e. 99.9 % absorption) when thicknesses of layer were less than 500 nm.

Keywords
BaFe12O19, BaFe10CoZnO19, reflection loss, multi nanolayer absorbers

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/VTcXmjWt38RG

Corresponding Author
Jordan Al Khalil

Institutions
Faculty of Mathematics and Science, State University of Medan
Jalan Willem Iskandar, Pasar V, Medan Estate, Sumatera Utara, Indonesia

Abstract
Research on graphene has developed in recent years. This is due to its excellent physical, mechanical, thermal and optical properties. Graphene is a potential nanofilter that can improve composite properties according to its excellent structure. Graphene has wide potential applications because of its exceptional properties and large quantities with low cost. However, to obtain pure graphene is difficult. An alternative, we can make a derivative of graphite that approaches graphene, that is graphene oxide. Graphene oxide (GO) is very attractive because of its low cost, easy access, and extensive ability to be converted into graphene. In this research, we used Hummers method to obtain the graphene oxide. This method is a commonly used method because it is easy and inexpensive. To find out the characteristics and composition of graphene oxide, the XRD and SEM instruments were used. After the testing and analysis process, it can produce graphene oxide material which is in accordance with the standard for later use as nanocomposite materials and we can apply it in more variety of potential applications in current technology.

Keywords
Graphene, Graphene Oxide, Hummers Method

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/8GjH7VCbUZJL

Corresponding Author
Rudy T.M. Situmeang

Institutions
1 Department of Chemistry, University of Lampung, Indonesia
2 Department of Physics, University of Lampung, Indonesia

Abstract
Lanthanum chromite is a material that plays a large role in the development of fuel cells, catalysts, electronic devices, semiconductors and magnetics. The application of this compound is determined by the material characteristics. The LaCr1-xVxO3 compound was prepared using a simultaneously method of sol-gel and freeze-drying from salts of chrome, lanthanum, and vanadium in pectin solution. The characterization results using X-ray diffraction, diffuse-reflectance UV-Vis spectrophotometer, and SEM-EDS showed that the materials formed have the main structure of ABO3 perovskite (such as LaCrO3 and LaVO3) with minor phases of LaCr2O6 and LaVO4 while the band-gap energy of materials due to the addition of vanadium in LaCrO3, it shifts its energy to a lower direction, namely: 2.89; 2.3; 2.4; 2.5 eV for LaCr1-xVxO3 (where x = 0, 0.1, 0.3, and 0.5), respectively. Then, SEM micrographs showed that the distribution of the crystalline phase is fairly even and homogeneous.

Keywords
Perovskite, nanomaterial, band-gap energy, well distribution

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/8Gh9zZtw23Xm

Corresponding Author
Nirwan Syarif

Institutions
Universitas Sriwijaya, Universiti Teknologi Malaysia

Abstract
The performance of symmetrical and asymmetrical supercapacitors were determined by using electrochemical impedance spectroscopy, cyclic voltammetry, and charge-discharge galvanostatic methods. The construction of asymmetric supercapacitor was a thick layer electrode of paper-bark wood carbon sheets as anode, etched aluminum foil as cathode and gel contained BaCO3 as electrolyte. The symmetric used carbon thick layer both as anode and cathode. The electrodes were made of carbon - graphite mixture with ratio of 3 : 7, and 10% of binder, supported by a glass plate. The results of charging – discharging tests showed that the symmetrical 3 : 7 supercapacitor has highest capacitance value in ie 0.434 F for 10% BaCO3 electrolyte in polyvinylalcohol media. Cyclic voltammetry measurement showed that the symmetrical has the highest capacitance value i.e., 0.0138 Fg-1. The charge-discharge galvanostatic measurement showed that the symmetrical has 1.445 of charging slope and 1.344 of discharging slope suggesting the charging rate faster than the discharge rate.

Keywords
Ultracapacitor, potensiostat, electrochemistry, electrolyte, polymer

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/9vckndg7C8mf

Corresponding Author
Windri Handayani

Institutions
1 Departemen Biologi, Universitas Indonesia, Depok 16424
2 Departemen Fisika, Universitas Indonesia, Depok 164241

Abstract
Matoa leaves, beside of their medicinal properties it can so be used for biosynthesis of silver nanoparticles. The factors that play role in the biosynthesis process is pH. Therefore, this study carried out the biosynthesis of silver nanoparticles using leaves extract of Matoa and the effect of pH on the shape, size and stability of the silver nanoparticles. Biosynthesis was carried out by mixing 2% Matoa extract and 1 mM AgNO3 solution which then incubated for 24 hours. There are four variations of pH used, 4, 7, 9 and 11. Silver nanoparticles were characterize based on color changes, UV-Vis spectrophotometers, TEM (Transmission Electron Microscopy), and PSA (Particle Size Analyzer). The photos and UV-Vis spectra of pH treatment showed a change in the color of the solution to yellow-brown and had absorption at a wavelength of 400-500 nm indicating the formation of silver nanoparticles. The TEM results showed that the boiled water of the Matoa leaves tend to have spherical silver nanoparticles. The higher the pH of the reaction environment, smaller silver nanoparticles formed, and the stability of the silver nanoparticles produced tends to be unstable except for AgNP in pH 9 which is moderately stable and has a good monodispersity.

Keywords
Pometia pinnata, Silver nanoparticles, Biosynthesis, pH

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/gWet7yhP6wmb

Corresponding Author
PRISTANUCH KASIAN

Institutions
744 Sura Narai Rd, Nai-muang, muang, Chang Wat Nakhon Ratchasima 30000, pristanuch.ka[at]rmuti.ac.th
Department of Applied Physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan

Abstract
Zn-doped titanate nanowires (TNWs) with the chemical formula of ZnxTi3-xO7 (Na0.96 H1.04 × 3.42H2O) where x = 0, 0.05, 0.1, 0.2, and 0.3 were synthesized by a hydrothermal method at a temperature of 130 °C for 24 h. The synthesized samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and Brunauer-Emmett-Teller (BET) techniques. It was found that, the diameter and length of the nanotubes were in scale of nanometer. Electrochemical properties of prepared samples were investigated by cyclic voltammetry (CV), galvanostatic charge - discharge (GCD) and electrochemical impedance spectra (EIS) methods. The specific capacitance of 23 F g-1 (at 1 mV s-1) was observed for Zn-doped TNWs.

Keywords
Energy storage, Zn-doped TNWs, Electrochemical properties

Topic
Nano-materials and applications

Link: https://ifory.id/abstract/AuCEFbQpBdqk