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Pengaruh Temperatur Penumbuhan terhadap Struktur Kristal dan Morfologi Film Tipis TiO2:Eu yang Ditumbuhkan dengan Metode MOCVD [The Effect of Growth Temperature on the Crystall Structure and Morphology of the Thin Film TiO2:Eu Grown with MOCVD Method] Edy Supriyanto; Goib Wiranto; Hery Sutanto; Agus Subagio; Mikrajuddin Abdullah; Maman Budiman; Pepen Arifin; Sukirno Sukirno; Mohamad Barmawi
Jurnal Matematika & Sains Vol 12, No 2 (2007)
Publisher : Institut Teknologi Bandung

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Abstract

Thin film of TiO2:Eu had been grown on an n-type Si(100) substrate using Metalorganic Chemical Vapor Deposition (MOCVD) method with titanium (IV) isopropoxide [Ti{OCH(CH3)2}4] 99.99% and europium nitrate [Eu(NO3)3.6H2O] 99.99% as the metal organic precursors. The tetrahydrofuran (THF) was used as a solvent for the precursor. X-ray Diffraction (XRD) analysis showed that the TiO2:Eu thin film grown at temperature of 450 οC had crystal planes of rutile (200), rutile (002) and anatase (211), whereas film grown at 500 οC resulted in a crystal plane of rutile (002) with columnar grain and surface morphology relatively smooth. On the other hand, film grown at temperature of 550 οC has rutile (200) and rutile (002) planes. The surface morphology of thin films TiO2:Eu was affected by Eu atom concentration. The roughness of surface morphology increased with increasing Eu content and therefore the grains became larger. It can be concluded that the crystal structure and surface morphology properties of the films depended significantly on the substrate temperature.
MONITORING KUALITAS AIR SECARA ON-LINE: STUDI KASUS SUNGAI BRANTAS Goib Wiranto
Purifikasi Vol 6 No 1 (2005): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v6.i1.271

Abstract

Sebanyak 23 monitoring kualitas air secara on-line telah terpasang di sepanjang sungai Brantas di Jawa Timur. Konstruksi stasiun on-line ini telah diarahkan secara akurat, realtime, terprogram, dan data yang berkelanjutan atas mutu dari air sungai Brantas, seperti tingkat polusi air dapat dideteksi tepat waktu. Penempatan 23 stasiun tersebut, seperti halnya jenis parameter yang dideteksi oleh sensor di dalam stasiun, telah didasarkan pada karakteristik air sungai pada masing-masing penempatan. Dengan ini, sumber polusi air dapat dideteksi dengan lebih akurat. Parameter yang terukur meliputi pH, temperatur, konduktivitas, oksigen terlarut, kekeruhan, orthophosphate, dan amoniak.
Sistem Monitoring Kualitas Air Menggunakan Sensor Turbidity Metode Nephelometri Berbasis Raspberry PI 3 Goib Wiranto; Tri Rahajoeningroem; Al Fatin Fernanda
Telekontran : Jurnal Ilmiah Telekomunikasi, Kendali dan Elektronika Terapan Vol 8 No 1 (2020): TELEKONTRAN vol 8 no 1 April 2020
Publisher : Program Studi Teknik Elektro, Fakultas Teknik dan Ilmu Komputer, Universitas Komputer Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (559.555 KB) | DOI: 10.34010/telekontran.v8i1.3070

Abstract

n this research it has designed a turbidity sensor system to determine the parameters of turbidity in water that can be consumed, using the nephelometry method. Nephelometry is a method in utilizing the nature of light scattering, light sources emitted into water media containing particles that will be scattered and detected by light detectors positioned at 90 ° angle. In this work the light source was used a super bright red LED and a TSL 250r photodiode light detector with a wavelength of 630nm. This paper will also explain process of making sensor and the turbidimeter system on the basis of Raspberry Pi 3. The results of the turbidimter sensor characterization obtained with the least square equation are y = 232.51x-61.29, the formula is can be used to change the ADC value to NTU (Nephelometer Turbidity Unit). The turbidity sensor has an accuracy of a minimum value is 2 NTU and a maximum value is 200 NTU with an error under 5%.
Online Monitoring Kualitas Air pada Budidaya Udang Berbasis WSN dan IoT Yudi Yuliyus Maulana; Goib Wiranto; Dayat Kurniawan
INKOM Journal Vol 10, No 2 (2016)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.inkom.456

Abstract

Dalam tulisan ini dijelaskan desain dan pengembangan sistem online monitoring kualitas air berbasis wireless sensor Network (WSN) dan Internet of Things (IoT). Sistem ini didesain dan dikembangkan untuk memantau parameter DO (Dissolved Oxygen), pH, conductivity dan temperatur pada budidaya udang. Sistem terdiri dari beberapa node sensor dengan komponen utama arduino uno yang terhubung dengan Xbee board dan master board dengan komponen utamanya adalah Raspberry Pi 2 (RPi2) board dan Xbee. Data dikirim dari masing-masing node ke RPi2 menggunakan jaringan WSN dengan paket data yang dilengkapi dengan masing-masing ID, setelah itu data disimpan di database internal RPi2 dan ditampilkan di graph. Timer update server digunakan untuk update data dari RPi2 ke server menggunakan jaringan internet melalui wifi. Data di server dapat dilihat menggunakan website, selain itu juga data dapat dilihat pada aplikasi Telegram Messenger yang ter-install di perangkat ponsel. Program RPi2 dikembangkan menggunakan bahasa python dan komponen matplotlib. Hasil percobaan menunjukkan bahwa sistem memiliki prospek yang besar dan dapat digunakan untuk keperluan budidaya udang dengan memberikan informasi yang relevan dan tepat waktu. Data hasil pengumpulan tersebut dapat digunakan untuk penelitian dan analisa lebih lanjut. 
RANCANG BANGUN STASIUN BERGERAK UNTUK PEMANTAUAN KUALITAS AIR SUNGAI Goib Wiranto
Purifikasi Vol 7 No 1 (2006): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v7.i1.234

Abstract

A mobile station is required for conducting analysis in locations where a fixed station is not possible to be constructed. In this paper the design and construction of a mobile station for the analysis of river water quality will be described. The focus of this activity has been put on the monitoring of four river water quality parameters, namely pH, temperature, conductivity, and dissolved oxygen. The method of measurement has been based on continuous flow principle, in which sensors are put inside a flowcell that is continuously filled with river water. The resulting measurement from each parameter is then stored in a data logger unit that can be programmed to automatically send the stored values to a master station. With this technique, a mobile station for the online analysis of river water quality can be realized.
PERANCANGAN DAN PEMBUATAN DIVAIS SENSOR GAS CO BERBASIS INDIUM TIMAH OKSIDA (ITO) DENGAN TEKNOLOGI LAPISAN TIPIS Slamet Widodo; Goib Wiranto
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.964 KB) | DOI: 10.14203/jkti.v17i1.21

Abstract

In this paper it will be described the design and manufacturing of microdevice to be used as platform for Carbon monoxide (CO) gas sensor based on indium tin oxide (ITO). The device has been designed on silicon substrate with an active area of 3x3 mm2 , and consisted of bonding pad, heater, electrode, and temperature sensor components. The minimum feature size used is 50 microns, as allowed by the capability of photolithographic process. The formation of microdevice structure has been done mainly using lift-off technique on platinum (Pt) layer, which was deposited by DC sputtering with aluminium (Al) as sacrificial layer. The overall chip dimension is not more than 5x5 mm2.  The measurement conducted to study the resistance versus temperature characteristics has shown  that the heater and temperature sensor elements have functioned as expected, in which their resistances change linearly with an increase in substrate temperature between 20 – 200 oC. The range of increase in resistance values for the heater is 500 – 1000 ohm, whereas for the temperature sensor is 100 – 300 ohm.Keywords: Microdevices, lift-off process, sputtering, electrode, heater, gas sensor, ITO, CO gas.