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All Journal POSITRON Jurnal Ilmiah Aplikasi Isotop Radiasi Journal of Mathematical and Fundamental Sciences Gravitasi Omega: Jurnal Fisika dan Pendidikan Fisika Jurnal Fisika FLUX Panrita Abdi - Jurnal Pengabdian pada Masyarakat Journal of Dentomaxillofacial Science Indonesian Journal of Chemistry Jurnal Elektronika dan Telekomunikasi Indonesian Physical Review Makara Journal of Science

Dahlang Tahir

Department Of Physics, Hasanuddin University, Makassar 90245

Author-ID : 444489

Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics Other

Published : 27 Documents Claim Missing Document

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Pembuatan Prototipe Dye Sensitized Solar Cell (DSSC) Menggunakan Dye Bunga Pacar Air (Impatiens Balsamina L.) dan Bunga Kertas (Bougenville Spectabilis) Hardianti Adam; Eunike Dwioknain; Dahlang Tahir; Paulus Lobo Gareso
Jurnal Fisika FLUX Vol 16, No 2 (2019): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Prototipe dye sensitezed solar cell (DSSC) yang menggunakan dye dari bunga pacar air (Impatiens Balsamina L.) dan bunga kertas (Bougenville Spectabilis) telah difabrikasi dengan struktur sandwich menggunakan pasta TiO2 yang dideposisi pada kaca ITO dengan metode spin coating. Ekstrak dye dimaserasi selama 24 jam dan digunakan untuk perendaman lapisan TiO2 selama 48 jam dan 66 jam. Bubuk dye dan bubuk TiO2 dikarakterisasi menggunakan FTIR, larutan dye menggunakan UV-Vis dan lapisan tipis TiO2 menggunakan XRD. Hasil karakterisasi UV-Vis dan FTIR menunjukkan adanya pigmen antosianin pada bunga pacar air dan pigmen betalain pada bunga kertas serta adanya gugus hidroksil dan karbonil pada hasil FTIR. Hasil karakterisasi XRD menunjukkan fase anatase pada lapisan tipis TiO2 dan ukuran butir 37,99 nm menggunakan persamaan Scherrer, 30,10 nm menggunakan williamson-Hall dengan metode UDM. DSSC yang dibuat mengahasilkan efesiensi tertinggi pada perendaman 66 jam yaitu pada bunga pacar air 0,0022% dan bunga kertas 0,0090%.

Heat Flow Transport Model by Gauss-Seidel Type Iteration Methods for Gas and Solid Materials Nurlaela Rauf; Heryanto Haeruddin; Roni Rahmat; Dahlang Tahir
Jurnal Fisika FLUX Vol 18, No 1 (2021): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Technological processes for modification of materials, deposition, and prevented fumes in the pyrolysis processes are used gases materials in the medium with vacuum pressure or atmospheric air pressure. Therefore, it is essential to understand heat flow transport for designing an eﬃcient reactor or find the substrate's excellent position in the reactor or furnace for growing materials. We evaluated the energy transfer phenomena in the form of temperature distribution and heat flow for various heating sources for the gases and solid materials by Gauss-Seidel equation. The thermal conductivity coefficient (k), number of heating sources, and position of heating sources show an essential parameter for transmitting the distribution of the heat. For high k value shows efficiently for heat transfer at low temperature due to the atom's position close each other. The heat also affects to the phonon and lattice vibration like a wave which successfully shows these phenomena in this study.

Sintesis Nanopartikel Zno/Al2(So4)3 Dengan Metode Mechanical Alloying Sebagai Katalis Limbah Cair Untuk Meningkatkan Ketersediaan Air Vika Sri Anti; Heryanto Heryanto; Dahlang Tahir
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 19, No 1 (2022): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

ZnO/Al2(SO4)3 synthesized by mechanical alloying method (1, 10, and 15 hours) was applied as methylene blue (MB) photodegradation. Fourier transform infrared (FTIR), X-Ray Diffraction (XRD), and Uv-Visible (Uv-Vis) were used to characterize the Physico-chemical properties of the composites. The results of XRD and FTIR characterization showed an average crystal size of 50.02 nm and the lowest transmittance value (%) at 10 hours milling, the degradation efficiency was much influenced by crystallinity speed, functional groups, and milling time. In this study, the optimal degradation based on the results of the Uv-Vis was shown by the sample ZnO/Al2(SO4)3 for 10 hours milling with a degradation percentage of 84.87%. Furthermore, it was found a ZnO/Al2(SO4)3 composite with a very short degradation time of 20 minutes. In order to reduce water pollution in environments, composite based on natural material is a promising solution due to their ability to break up pollutant radical compounds bonding.

PELATIHAN PEMBUATAN PAPAN IKLAN DOT-MATRIKS BERBASIS MIKROKONTROLER DI SMKN 1 WAJO A. Arifin; Ida Laila; Muqoil Darussalam; Nurlindah Hamrun; Dahlang Tahir; Syamsir Dewang
Panrita Abdi - Jurnal Pengabdian pada Masyarakat Vol. 5 No. 3 (2021): Jurnal Panrita Abdi - Juli 2021
Publisher : LP2M Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/pa.v5i3.11254

Technological development in the manufacture of microcontroller-based dot-matrix billboards carried out in the form of counseling and training for students at Wajo 1 State Vocational High School (SMK). The implementation of this training aims to increase the insight, knowledge, and skills of vocational school students, which are an educational level that must have different knowledge from the level of education in general. The method of implementing this activity includes site observation, preparation, counseling, and provision of materials related to physics and energy, entrepreneurship, optoelectronic technology, as well as the implementation of training on making Arduino microcontroller-based dot-matrix billboards and evaluating the training implementation. The result of this activity is an increase in the knowledge and insight of students in terms of making a series of dot-matrix billboards using electronic components, understanding program code, running the Arduino Integrated Development Environment (IDE) program, conducting simulations on circuits using the Arduino microcontroller and students have successfully demonstrated and run the running text panel that was created using an Android smartphone. --- Pengembangan teknologi dalam pembuatan papan iklan dot-matriks berbasis mikrokontroler yang dilakukan dalam bentuk penyuluhan dan pelatihan kepada siswa-siswi di Sekolah Menengah Kejuruan (SMK) Negeri 1 Wajo . Pelaksanaan pelatihan ini bertujuan untuk meningkatkan wawasan, pengetahuan dan keterampilan siswa-siswi SMK yang merupakan tingkat pendidikan yang harus memiliki pengetahuan yang berbeda dari tingkat pendidikan pada umumnya. Metode pelaksanaan kegiatan ini meliputi peninjauan lokasi, persiapan, penyuluhan dan pemberian materi terkait fisika dan energi, kewirausahaan, teknologi opto-elektronika, serta pelaksanaan pelatihan pembuatan papan iklan dot-matriks berbasis mikrokontroler arduino dan evaluasi pelaksanaan pelatihan. Hasil dari kegiatan ini adalah adanya peningkatkan pengetahuan serta wawasan siswa dalam hal pembuatan rangkaian papan iklan dot-matriks menggunakan komponen elektronika, memahami kode program, menjalankan program arduino Integrated Developement Environment (IDE), melakukan simulasi pada rangkaian menggunakan mikrokontroler arduino serta siswa telah berhasil mendemonstrasikan dan menjalankan panel running text yang telah dibuat dengan menggunakan smartphone android.

Band Alignment and Optical Properties of (ZrO2)0.66(HfO2)0.34 Gate Dielectrics Thin Films on p-Si (100) Dahlang Tahir; Hee Jae Kang; Sven Tougaard
Journal of Mathematical and Fundamental Sciences Vol. 43 No. 3 (2011)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.sci.2011.43.3.5

(ZrO2)0.66(HfO2)0.34 dielectric films on p-Si (100) were grown by atomic layer deposition method, for which the conduction band offsets, valence band offsets and band gaps were obtained by using X-ray photoelectron spectroscopy and reflection electron energy loss spectroscopy. The band gap, valence and conduction band offset values for (ZrO2)0.66(HfO2)0.34 dielectric thin film, grown on Si substrate were about 5.34, 2.35 and 1.87 eV respectively. This band alignment was similar to that of ZrO2. In addition, the dielectric function ï¥(k, Ï‰), index of refraction n and the extinction coefficient k for the (ZrO2)0.66(HfO2)0.34 thin films were obtained from a quantitative analysis of REELS data by comparison to detailed dielectric response model calculations using the QUEELS-Îµ (k,Ï‰)-REELS software package. These optical properties are similar with ZrO2 dielectric thin films.

Effect of Chlorine Plasma Treatment on Electronic Properties of GIZO Thin Film Grown on SiO2/Si Substrate Dahlang Tahir; Suhk Kun Oh; Hee Jae Kang; Sung Heo; Jae Gwan Chung; Jae Cheol Lee
Journal of Mathematical and Fundamental Sciences Vol. 45 No. 3 (2013)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2013.45.3.1

The effect of chlorine plasma treatment on electronic properties of GIZO grown on SiO2/Si by RF magnetron sputtering was investigated using X-ray photoelectron spectroscopy (XPS), reflection electron energy loss spectroscopy (REELS), and secondary ion mass spectroscopy (SIMS). SIMS depth profiles indicated that the concentration of InO and ZnO on the surface was decreased after Cl2 plasma treatment. REELS data showed that the band gap increased from 3.4 to 3.7 eV. XPS showed that Ind5/2 and Zn2p3/2 shifted to the higher binding energies by 0.5 eV and 0.3 eV, respectively. These phenomena were caused by oxygen deficiency and hydrocarbon contamination reduction as indicated by Cl atom bonding with In and Zn cations that are present on the surface after Cl2 plasma treatment.

Effect of Geometrical Structure to the Performance of Monolithic Dye–Sensitized Solar Cells Bayu Aditya Nugraha; Shobih Shobih; Jojo Hidayat; Dahlang Tahir
Jurnal Elektronika dan Telekomunikasi Vol 18, No 2 (2018)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v18.53-59

Since invented for the first time, researchers in the world were focusing on how to increase the efficiency of dye-sensitized solar cells (DSSC) and reduce of the fabrication cost. Monolithic type of DSSC is one of the best solutions to reduce the fabrication cost due to the elimination of one of transparent conductive oxide (TCO) substrate. In this study, DSSC monolithic was fabricated layer by layer by using screen printing method. There are three layers that printed in each cell namely TiO2, ZrO2, and carbon before being injected with electrolytes. The geometrical structure of DSSC was varied to find the highest performance. From the I-V characteristics and incident photon-to-current efficiency (IPCE) characterization shows the highest efficiency is 0.137% and the highest conversion of photons to current occurs at around 510 nm wavelength, for a structure which has ZrO2 layer not crosses over the no-FTO area, while TiO2 layer half crosses the no-FTO area, this is most likely caused by the imperfection of the ZrO2layer.

Analysis of Thermal Treatment Zirconia as Spacer Layer on Dye-Sensitized Solar Cell (DSSC) Performance with Monolithic Structure Chairil Anwar; Erlyta Septa Rosa; Shobih Shobih; Jojo Hidayat; Dahlang Tahir
Jurnal Elektronika dan Telekomunikasi Vol 18, No 1 (2018)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v18.21-26

Monolithic dye-sensitized solar cells (DSSC) offer the prospect of lower material cost and require a simpler manufacturing process compared with conventional DSSC. Fabricated on a single fluorine tin oxide (FTO) glass substrate consists of a nanoporous TiO2 photoanode layer, a ZrO2 spacer layer, a carbon counter electrode layer, a dye, and an electrolyte. The spacer layer on the monolithic DSSC serves as electrolyte storage and insulating layer to separate between photoanode and counter electrode. Zirconia is often used as a spacer because it has high temperature resistant properties, high dielectric constant and adhesive as an insulator that has band gap between 5-6 eV. The effects of the thermal treatment of zirconia layer as a spacer electrolyte on the performance of monolithic DSSC have been investigated. The cell’s performance increases with the sintering temperature as well as indicated by the decreased in particle size and increased in quantum efficiency in the absorption region of the titania layer. Co-sintering treatment tends to drastically reduce cell’s performance. The highest performance was obtained at a temperature sintering of 500o C with an PCE of 0.22%, Isc = 0.16 mA and Voc = 0.71 V.

A Comparison of the Utilization of Carbon Nanopowder and Activated Carbon as Counter Electrode for Monolithic Dye-Sensitized Solar Cells (DSSC) Zaky Mubarak; Natalita Maulani Nursam; Shobih Shobih; Jojo Hidayat; Dahlang Tahir
Jurnal Elektronika dan Telekomunikasi Vol 18, No 1 (2018)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v18.15-20

Monolithic design is one of the most promising dye-sensitized solar cell (DSSC) architectures to develop, because it allows the elimination of one conductive substrate and offers the possibility for printing layer-by-layer of the materials that made up its structure. In this study, titanium dioxide-based monolithic type DSSCs were fabricated on a single fluorine-doped transparent oxide coated glass with TiO2 as photoanode and porous ZrO2 as spacer. The type of the carbon material used as the composite paste for the counter electrode was varied to see the effect on the solar cell efficiency. Four-point probes measurement revealed that the resistivity of the carbon layer synthesized using activated carbon exhibited slightly higher conductivity with a sheet resistance of 10.70 Ω/sq and 11.09 Ω/sq for activated carbon and carbon nanopowder, respectively. The efficiency of DSSC that uses activated carbon as counter electrode was higher (i.e. 0.221%) than the DSSC with carbon nanopowder (i.e. 0.005%). The better performance of DSSC with activated carbon as a counter electrode was due to its better conductivity and higher surface area compared to those of carbon nanopowder.

Physical characteristics test (water content and viscosity) of extraction sodium alginate brown algae (phaeophyta) species padina sp. as basic material for production dental impression material Nurlindah Hamrun; Bahruddin Thalib; Dahlang Tahir; Syaharuddin Kasim; Ahmad F. Nugraha
Journal of Dentomaxillofacial Science Vol. 3 No. 2 (2018): (Available online: 1 August 2018)
Publisher : DiscoverSys Inc.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15562/jdmfs.v3i2.625

Objective: This research aims to explore the potential of brown algae species padina sp. as a dental impression material by examining the physical characteristics of the sodium alginate extraction of brown algae species padina sp.Material and Methods: This research is a quasi-experimental with one-shot case study design. Samples are brown algae species padina sp. from Punaga and Puntondo beach in South Sulawesi. Brown algae species padina sp. is extracted to obtain sodium alginate and further tested for physical characteristics including viscosity test and water content.Results: The extraction of brown algae species padina sp. resulted in 250 grams (25%) of brown powdered sodium alginate that smelled fishy. Physical characteristic tests revealed the water content of sodium alginate species from brown algae padina sp. was 8%. This result is acceptable for sodium alginate water content as set by the Food Chemical Codex that requires less than 15% water content. The measurement of the viscosity obtained is 13.33 cps.Conclusion: These results indicate that the species of brown algae padina sp. has the potential to be one of the basic materials of dental impression material.

Co-Authors A'yun, Arini Qurrata A. Arifin Abd Rahman Abdullah, Bualkar Ahmad F. Nugraha Arsita sita Aswad Aswad Bahruddin Thalib Bayu Aditya Nugraha Chairil Anwar Chairil Anwar Dani, Ali Umar Destalina, Destalina Diana Eka Pratiwi Erlyta Septa Rosa Erlyta Septa Rosa Eunike Dwioknain Eunike Dwioknain Fitriani Fitriani Gareso, Paulus L Gareso, Paulus Lobo Hamsi, Taufik Hardianti Adam Hardianti Hardianti Hee Jae Kang Hee Jae Kang Hee Jae Kang Hee Jae Kang Hendri Hendri Heryanto Haeruddin Heryanto Heryanto Heryanto Heryanto Ida Laila Ilyas, Sri Dewi Astuty Inayatul Mutmainna, Inayatul Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Isnaeni Jae Cheol Lee Jae Gwan Chung Jojo Hidayat Jojo Hidayat Jojo Hidayat June Mellawati Lorna, Lorna Mujtahid, Fitriah Muqoil Darussalam Natalita Maulani Nursam Nita Magfirah Ilyas Nugraha, Bayu Aditya Nurlaela Rauf Nurlindah Hamrun Nursam, Natalita Maulani Nurul Fajri R Tang Putri, Radha Hartina R Pradana Rachmat Triandi Tjahjanto Ramlan, Nurul Mutmainnah Roni Rahmat Shobih Shobih Shobih Shobih Shobih Shobih Siti Fatimah Siti Fatimah Siti Fatimah Sri Dewi Astuty Ilyas Suhk Kun Oh Sung Heo Suriati Eka Putri Sven Tougaard Syaharuddin Kasim Syamsir Dewang Syamsul Arifin Vika Sri Anti Zaky Mubarak Zaky Mubarak, Zaky

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