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All Journal Bionatura POSITRON Jurnal Sains Materi Indonesia Jurnal Matematika & Sains Journal of Engineering and Technological Sciences Jurnal Kimia dan Kemasan JFA (Jurnal Fisika dan Aplikasinya) Jurnal Kimia dan Kemasan PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Jurnal Ilmu dan Inovasi Fisika
Fitrilawati Fitrilawati
Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics Other

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Journal : JFA (Jurnal Fisika dan Aplikasinya)

 1 
Pengaruh Konsentrasi Ion Aktif Erbium (Er3+) pada Sifat Fisis Medium Gelas Borat-Lithium Rajagukguk, Juniastel; Fitrilawati, Fitrilawati
Jurnal Fisika dan Aplikasinya Vol 14, No 2 (2018)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4214.599 KB) | DOI: 10.12962/j24604682.v14i2.3529

Abstract

Lithium-Borate glasses medium doped Erbium (Er3+) active ion have been prepared by melting-quenching technique. The glasses medium followed composition (mol%): 65 – x)B2O3 - 5ZnO - 5Li2O - 15 Na2O - 10PbO - xEr2O3 (with  x = 0; 0,05; 0,1; 0,5; 1,0; 2,0 dan 4,0 mol%). Sample with powder form are mixed in the crucible alumina and melted at temperature 1200 oC by using of electrical furnance. After poured in to stainless stell,  glasses sample were annealed with the decreases rate 7oC per minute. Physical properties og glass medium such as density, molar volume and refractive index were inviestigated. From measured results can be known that Er3+ ion doped with lithium borate glass can affect physical properties of glass host medium. Density of glass is increased from 2.96 gr/cm3 (x = 0.1 mol%) to 3.185 gr/cm3 (x = 4 mol%). Refractive index of glass medium also increased with addition Er3+ ion concentration. The maximum refractive index is obtained when Er3+ ion concentration of 2.0 mol%. Based on research results can be explained that Er3+ doped Lithium-Borat glasses can be used as one of optical gain candidate.
Efek Jenis Pelarut pada Sifat Optik, Morfologi Permukaan dan Koefisien Waveguide Loss dari Pandu Gelombang Planar Polimer Terkonjugasi MEH-PPV Ayi Bahtiar; Yeni Kurniawati; Fitrilawati Fitrilawati; Yayah Yuliah; I Made Joni
Jurnal Fisika dan Aplikasinya Vol 4, No 1 (2008)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (163.31 KB) | DOI: 10.12962/j24604682.v4i1.944

Abstract

Dalam tulisan ini dilaporkan studi efek jenis pelarut pada sifat optik, morfologi permukaan dan koefisien waveguide loss gw dari pandu gelombang planar polimer MEH-PPV. Pandu gelombang planar dibuat dengan teknik spin-coating dari larutan polimer dengan pelarut toluen, kloroform dan THF. Hasil studi menunjukkan bahwa sifat optik dan morfologi permukaan film MEH-PPV dipengaruhi oleh jenis pelarut yang digunakan.Film dengan pelarut toluen dan kloroform mempunyai morfologi permukaan yang homogen, akibatnya nilai gw lebih kecil dari 1 dB/cm. Sedangkan pelarut THF membentuk tekstur di permukaan film MEH-PPV karena agregasi rantai polimer, sehingga nilai gw menjadi besar.
Pembuatan Lapisan Tipis Oksida Grafena Tereduksi sebagai Material Elektroda Sistem Kapasitor dan Karakterisasinya Vika Marcelina; Fitri Yuliasari; Yeni W Hartati; F Fitrilawati; Norman Syakir
Jurnal Fisika dan Aplikasinya Vol 13, No 3 (2017)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (223.307 KB) | DOI: 10.12962/j24604682.v13i3.2841

Abstract

Grafena adalah material karbon dua dimensi dan memiliki sifat mekanik, listrik, dan termal yang unggul. Grafena memiliki potensi sebagai bahan elektroda sistem penyimpanan energy seperti superkapasitor. Dalampenelitian digunakan bahan reduced graphene oxide (RGO) yang diperoleh melalui proses reduksi secara termal bahan graphene oxide (GO) komersial. Lapisan tipis GO di atas substrat ITO-glass dibuat menggunakan metode Spincoating pada kecepatan 1000 rpm selama 60 sekon. Lapisan tipis RGO diperoleh dengan cara pemanasan lapisan tipis GO pada temperatur 200C selama 1 jam. Sistem kapasitor menggunakan anoda dan katoda dari bahan RGO di atas dan untuk medium elektrolit digunakan larutan H2SO4 1 Molar. Karakteristik sistem kapasitor tersebut diamati melalui pengukuran cyclic voltammetry (CV) secara potensio-static pada rentang tegangan -0,2-0,8 volt dengan scan rate 125 mV/s. Juga dilakukan karakteristik charge-discharge melalui pengukuran pengisian-pengosongan muatan secara galvano-static. Karakteristik sifat penyimpanan muatan secara kapasitip diperlihatkan dengan adanya pola histerisis pada hasil kurva CV. Hasil pengukuran charge-discharge memperlihatkan pola kurva segitiga yang mengindikasikan adanya proses penyimpanan muatan. Nilai kapasitansi spesifik maksimum elektroda RGO adalah 1,54 × 10−4/massa F/g pada kondisi arus pengosongan 0,7 μA.ABSTRACTGraphene is a two-dimensional carbon material and has superior mechanical, electrical, and thermal properties. Graphene has potential as an electrode material for energy storage systems such as supercapacitors. In the study used reduced graphene oxide (RGO) material obtained through the thermal reduction process of commercial graphene oxide (GO) material. The GO thin layer on the ITO-glass substrate was made using Spin coating method at 1000 rpm for 60 seconds. The RGO thin layer was obtained by heating the GO thin film at a temperature of 200C for 1 hour. The capacitor system uses the anode and cathode of the above RGO material and for the electrolyte medium, a 1 Molar H2SO4 solution is used. The characteristic of the capacitor system was observed by potential-static cyclic voltammetry (CV) measurements in the voltage range of -0.2-0.8 volts with a scan rate of 125 mV/s. Also performed the characteristics of charge-discharge through the measurement of charge-discharging charge in galvanostatic. Characteristic properties of energy storage are shown in the presence of a pattern of hysteresis on the CV curve. The result of the charge-discharge measurement shows a triangle curve pattern indicating the existence of a storage process of the charge. The maximum specific capacitance value of RGO electrode is 1.54 × 10−4 / mass F/g at 0.7 μA discharge current condition.
Co-Authors Agustin P. Mastiti Akihiko Fujii Akihiko Fujii Anita Anggraeni Annisa Aprilia Annissa Aprilia Aprilia, Annisa ARDI, ATIKAH Ayi Bahtiar Diyan Unmu Dzujah Fitri Yuliasari H. A. Melati - H. Akiyama - Hanipah, Iip Hendro Hendro Herman Herman Herman Herman Hidayat - I Made Joni Istiqamah Nurul Hikmah Jakrapong Kaewkhao Jedija Monandang Aurellia Juniastel Rajagukguk K. Tamada - Lia Yuliantini Lukman Nulhakim Lusi Safriani Marcelina, Vika Masanori Ozaki Masanori Ozaki Mastiti, Agustin P. May On Tjia Mitra Djamal N. Syakir - Norman Syakir Norman Syakir, Norman NOVIANTI, RESSA MUSRIPAH Nur Khanifah Pina Pitriana Pina Pitriana Rahmat Hidayat Rahmat Hidayat Rajagukguk, Juniastel Rany Miranti Rany Miranti RISDIANA RISDIANA, RISDIANA Rosmiati - Rustam Efendi Siregar Ryan Irmansyah Ryan Irmansyah S. Hidayat - S. Sesiaria - Saajidah Fathinal Haq Sahrul Hidayat Siregar, R.E Titis Amelia Tuti Susilawati Unmu Dzujah, Diyan Utami Yuliani Vicka P. Lestari Vika Marcelina Vika Marcelina W. Suratno - W.Widorini - Widiyanta Gomulya Widiyanta Gomulya Wildan Abdussalam Yasmin Fauziah, Gita Maulida Yayah Yuliah Yeni Kurniawati Yeni W Hartati Yuliani, Utami YULIASARI, FITRI Yusi S. Syamsiar