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INDONESIA
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Published by Universitas Negeri Jakarta
ISSN : 23021829     EISSN : 24769398     DOI : https://doi.org/10.21009/03
Core Subject : Science, Education, Engineering,
Electrical & Electronics Engineering Energy Physics Other
Focus and Scope: Physics education Physics Instrumentation and Computation Material Physics Medical Physics and Biophysics Physics of Earth and Space Physics Theory, Particle, and Nuclear Environmental Physics and Renewable Energy
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 976 Documents
 11   12   13   14   15 
PENENTUAN CELAH PITA ENERGI FILM TIPIS BARIUM STRONSIUM TITANAT (Ba1-xSrxTiO3) UNTUK x= 0,4 ; 0,5 DAN 0,6 Rahmi Dewi; Krisman Krisman; Taufiq Hidayat
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (596.018 KB) | DOI: 10.21009/0305020220

Abstract

Barium Strontium Titanate (BST) thin film on the substrate glass was successfully fabricated by using sol-gel method. The purpose of this research is to obtain optical energy band gap value by adopting Tauc plot method with various composition and temperature. Obtaining of such information could be through identifying the degree of absorbance, degree of transmittance, the extent of refractive index, the usage of thin film and its quantified coefficients. Subsequently, the optical properties of thin film are characterized by using Ultraviolet-Visible Spectrophotometer with a thin film of Ba1-xSrxTiO3 subjected to temperatures of 650ºC. Upon subjected to temperature stated above, the wide energy band gap optical thin film Ba0,6Sr0,4TiO3 is in the range of 2.0 eV for Ba0,5Sr0,5TiO3 is in the range of 1.55 eV and for Ba0,4Sr0,6TiO3 is in the range of 2.0 eV. Keywords: Thin Film BST, Composition, Temperature, Energy Band Gap.
IDENTIFIKASI UNSUR-UNSUR KIMIA PADA KAYU KERAS (HARDWOOD) DAN KAYU LUNAK (SOFTWOOD) DENGAN TEKNIK LASER INDUCED SHOCKWAVE PLASMA SPECTROSCOPY Dani Rustanti; Mangasi Alion Marpaung; Maria Margaretha Suliyanti
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (264.709 KB) | DOI: 10.21009/0305020221

Abstract

Spectral analysis of elemental wood samples (teak, meranti and balsa) has been done using Laser Induced Shockwave Plasma Spectroscopy with laser Nd-YAG (1064 nm, 10 Hz), which is operated in mode Q-Switch. The study was conducted to identify and compare the content of the chemical elements of the wood samples. Samples were placed in a chamber made of metal where the air pressure can be varied with vacuum pumps. In this experiment there are three times varied pressure 5 torr, 15 torr and 35 torr while the laser energy is varied 5 times, which are 12 mJ, 45 mJ, 70 mJ, 93 mJ, and 120 mJ. Plasma generated by focusing the beam (pulse) of laser at the sample surface by the focusing lens through the window. Plasma radiation was detected using a spectrometer equipped with fiber optics. The research results obtained spectrum plasma lines are the sharpest on the energy of 93 mJ pressure of 5 torr for each samples. The elements were detected, namely carbon (C), hydrogen (H), oxygen (O), calcium (Ca), nitrogen (N), magnesium (Mg), and potassium (K) which the intensity of the hardwood elements (teak and meranti) is higher than the intensity of the softwood elements (balsa). Keywords: Laser Induced Shockwave Plasma Spectroscopy, hardwoods and softwoods, identification of chemical elements.
SIFAT MEKANIK DAN OPTIK KACA SENG MAGNESIUM FOSFAT Eko Budiyanto; Agus Setyo Budi; Erfan Handoko; Md. Rahim Sahar
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (572.75 KB) | DOI: 10.21009/0305020222

Abstract

Glass ZnO-MgO-P2O5 with the addition of ZnO composition between 0-15 mol% has been successfully using techniques Melt Quenching. With the analysis of X-ray diffraction (XRD) structure of glass obtained showed properties of amorphous materials. Photoluminescence spectrum has a dominant emission band on the observation of the peak at around 385nm. Sedangjkan hardness test of glass ZnO-MgO-P2O5 decreased with the increasing composition of ZnO. Keywords: glass ZnO-MgO-P2O5; photoluminescence spectrum; melt quenching; XRD; hardness test.
PENGARUH PENAMBAHAN KOMPOSISI ABU BAMBU TERHADAP SIFAT FISIK KERAMIK BERBAHAN DASAR KAOLIN Rizka Fatimah Kirana; Agus Setyo Budi; Esmar Budi; Md. Rahim Sahar; Khamisah Abu Samah
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (664.511 KB) | DOI: 10.21009/0305020223

Abstract

Utilization of bamboo waste, especially ash from the combustion is rarely found as well as ceramic tile that made from agricultural waste. This experiment of making ceramics from agrowaste-bamboo used various composition. The composition of this making the ceramics is 30%, 40%, 50% and 60% of bamboo ash. The purpose of this study is to determine the effect of bamboo ash composition on the physical characteristics of ceramic which is called density. The bamboo ash with a size of 100 microns was selected for testing. Sintering technique carried out at a temperature of 700°C to this kaolin based ceramic. Testing is done by using the Archimedes method. The addition of bamboo ash composition than caolin to produce lower density structures with the highest value 2.261885321 g/cmᶟ and the lowest is 2.195299124 g/cmᶟ. These results indicate that the addition of bamboo ash composition having an effect on the physical characteristics of ceramics. Keywords: Ceramics, Agrowaste, Bamboo Ash, Sintering, Kaolin.
PENENTUAN UKURAN NANOPARTIKEL ZnO SECARA SPEKTROSKOPIK Yayah Yuliah; Sri Suryaningsih
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (880.001 KB) | DOI: 10.21009/0305020224

Abstract

At the nano scale the material properties depend on the size such that the characteristics of the materials can be engineered by controlling its size. Determining of the nano-particles size cannot be carried out easily because no available measuring instruments with accuracy in the order of nano which can be used directly. Electron microscope (TEM), which is considered as the most reliable tool in determining the size at the nano-scale is also not easy to accomplish. Indirect measurement method utilizing various spectrometers such as XRD, UV-Vis, and PL can be exploited to overcome this obstacle. In this study, the nano particles size was determined by analyzing the UV-Vis absorption spectra of materials via the effective mass model at the wavelength of the edge and the peak spectra’s. TEM Photos were used for confirmation. Three ZnO nano particles synthesized chemically used as the analyzed samples. Average particle size of each 4,92nm, 4.66 nm and 5,57nm were resulted by using the λedge of UV-Vis spectra’s whereas from the λpeak extracted 9.83 nm, 9,32nm and 11.3 nm of particles size respectively. TEM photograph show 7.2 nm, 6.31 nm and 26.37 nm average particle sizes for each ZnO sample. The results commonly are in the same order and particularly have similar trend. The overall results showed that the determination of nano particles size spectroscopycally make available informative results as an initial study. Keywords: nano size, spectroscopy, effective mass model.
ABSORBANCE SPECTRUM CARBON NANODOTS (C-DOTS) DAUN TEMBAKAU Adelina Ryan Candra Dewi; Mahardika Prasetya Aji; Sulhadi Sulhadi
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (541.001 KB) | DOI: 10.21009/0305020225

Abstract

Synthesis of C-Dots of dried tobacco leaves have been successfully carried out. C- Dots produced in liquid form, it is proved that the leaves of tobacco containing nicotine (toxic), can be transformed into new things more beneficial for the application. Extraction of tobacco leaves using 90% alcohol and water for 3.5 hours. A precursor solution prepared by adding urea degan variation of 1-6 grams into 20 ml extraction results. Dots C- synthesis is done by heating the precursor solution hydrothermally using a furnace for 30 minutes at 300 ° C temperature conditions. The physical properties of color C-Dots menunjukkam brown tobacco leaf to the color yellow. C-Dots from tobacco leaves that have been produced have absorption spectra of light at a wavelength of 398-430 nm. The maximum absorbance spectrum dihasilkn time of adding urea 1g. Energy gap when the addition of urea 1g have indigo ~ 2.25 eV and the energy gap when the addition of 2g to 6g urea have the same value of ~ 2.7 eV. When the addition of 2 g to 6 g of urea does not affect the energy gap C-Dots. Keyword : C-dots, leaf tobacco, absorbance, energy g
PENGARUH SUHU AKTIVASI TERHADAP DAYA SERAP KARBON AKTIF KULIT KEMIRI Landiana Etni Laos; Masturi Masturi; Ian Yulianti
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (947.06 KB) | DOI: 10.21009/0305020226

Abstract

Karbon aktif adalah produk dari proses aktivasi arang yang kemampuan penyerapannya lebih tinggi dan memiliki kegunaan lebih banyak daripada arang biasa. Beberapa bahan yang banyak digunakan sebagai sumber bahan baku pembuatan arang aktif adalah batubara, kayu dan limbah pertanian seperti tempurung dan kulit biji. Serbuk arang kulit kemiri diaktivasi dengan menggunakan larutan H3PO4 dengan konsentrasi 2,5% selama 24 jam dan disintering pada suhu 2000C, 2500C, 3000C, 3500C dan 4000C. Berdasarkan hasil penelitian, Suhu aktivasi mempengaruhi kualitas karbon aktif yang terbentuk. Dari uji kualitas karbon aktif yang dilakukan, kualitas karbon aktif yang terbaik diperoleh pada suhu 400 0C dengan kadar air 14,35 %, kadar abu 8,5%, daya serap terhadap kadar iod sebesar 252,97 mg/g yang memenuhi standar SNI 06-3730. Penelitian ini memperlihatkan bahwa semakin tinggi suhu aktivasi maka semakin tinggi daya serap karbon aktif. KataKunci: Kulit kemiri, Arang aktif, Daya Serap.
PENGARUH KONSENTRASI KARBON AKTIF KULIT KEMIRI DAN APLIKASINYA TERHADAP PENJERNIHAN LIMBAH CAIR METHYLENE BLUE Landiana Etni Laos; Mahardika Prasetya Aji; Sulhadi Sulhadi
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (795.468 KB) | DOI: 10.21009/0305020227

Abstract

Karbon aktif merupakan senyawa karbon amorph, yang dapat dihasilkan dari bahan-bahan yang mengandung karbon atau dari arang yang diperlakukan dengan cara khusus untuk mendapatkan permukaan yang lebih luas. Arang aktif dapat mengadsorpsi gas dan senyawa-senyawa kimia tertentu atau sifat adsorpsinya selektif, tergantung pada besar atau volume pori-pori dan luas permukaan. Arang aktif dapat dibuat dari arang kemiri yang dimanfaatkan untuk menjernihkan limbah cair methylene blue. Tempurung kemiri dikarbonisasi menggunakan tungku drum untuk menghasilkan arang, selanjutnya arang diaktivasi secara kimia dengan larutan asam fosfat. Proses aktivasi kimia arang kemiri dilakukan dengan merendam arang kemiri dalam larutan H3PO4 pada variasi konsentrasi 2%, 3%, 4%, dan 5% selama 24 jam. Karbon aktif yang dihasilkan memenuhi standar (SNI) 06–3730-1995 dengan hasil pengujian kadar air antara 13%-4,5% dimana standar SNI maksimum 15% dan kadar abu antara 1,5%-7,5% dimana standar SNI maksimum 10%. Pengujian karbon aktif pada penjernihan limbah methylene blue menunjukkan hasil yang maksimal ketika menggunakan karbon aktif dari dari konsentrasi 5% dengan variasi waktu kontak 30 menit, 60 menit, 90 menit, 120 menit, dan 150 menit. Hasil penelitian menunjukkan bahwa semakin lama waktu kontak antara karbon aktif dengan larutan zat methylene blue maka tingkat kejernihan air semakin tinggi. Kata kunci: Kulit kemiri, Karbon aktif, Limbah methylene blue.
PENGARUH PEWARNAAN TERHADAP KELUNTURAN WARNA RAMBUT MENGGUNAKAN PEWARNA ALAMI LIMBAH BIJI PEPAYA TERHADAP PENCUCIAN Vivi E. Roshanty Husin; Masturi Masturi; Ian Yulianti
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.592 KB) | DOI: 10.21009/0305020228

Abstract

Pewarnaan rambut merupakan tindakan mengubah warna rambut untuk menutupi rambut putih, sesuai dengan warna yang diinginkan. Pewarnaan rambut dapat menggunakan bahan alami atau nabati , diantaranya dari biji-bijian. Biji pepaya mengandung bahan Glucoside cacarindan karpain yang menghasilkan zat warna hitam. Rambut indah seperti mayang terurai merupakan kiasan yang menggambarkan rambut yang indah, berkilau sekaligus merupakan gambaran rambut sehat. Karena hanya rambut sehat yang mampu menampilkan kecantikan secara alami. Untuk memiliki rambut yan sehat dibutuhkan perawatan yang sesuai dengan kondisi rambut. Perawatan dapat dilakukan secara alami dengan menggunakan bahan-bahan alami yang berkhasiat. Salah satu bahan alami yang digunakan adalah biji buah pepaya. selanjutnya data dianalisis dengan metode statistik deskriptif. Berdasarkan hasil analisis data, diperoleh kesimpulan bahwa biji pepaya mengandung glucoside cacarin dan karpain yang terdapat pada panjang gelombang 450 nm – 950 nm sehingga dapat dimanfaatkan untuk menghitamkan rambut dan rambut yang diberi pewarna alami mudah luntuk jika dicuci terua-menerus. Kata kunci : rambut putih, biji pepaya, hasil kelunturan warna rambut.
ANALISIS TEKANAN COBLOS BAN TUBETYPE Sufiya Putri Martina; Sulhadi Sulhadi; Mahardika Prasetya Aji
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (260.16 KB) | DOI: 10.21009/0305020229

Abstract

Tire is the most important part of a motor vehicle because the tires only part of a motor vehicle who have direct contact with the road . Has the sharpened spikes on the ends. So when getting a pressure , a nail will be able to penetrate the tire or tires voting . Penetration pressure of each tire has a different value because of variations in the diameter of the nail 1,25mm , 1,55mm , 1,65mm , 1,85mm , 2,05mm and 2,8mm . Retrieving data using compressive strength . The results of his research is the largest diameter 2,8mm can cast their huge tires with the pressure of 10x104 Joules. While for most small diameter 1,25mm can cast their tires with a pressure of 40x103 Joule . So, from these results it can be concluded that any spikes that have different diameters have different pressure to penetrate the tire. Keywords : Tubetype tire , Compressive Strength.

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