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All Journal SOSCIED Frontiers Abdimas : Jurnal Pengabdian Kepada Masyarakat Jurnal FisTa : Fisika dan Terapannya
Donny Royke Wenas
Fisika Universitas Negeri Manado
Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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EFEK PERMUKAAN SUBSTRAT SILANE DALAM MENINGKATKAN INDEKS BIAS FILM DR-1 DENGAN METODE PVD BERBANTUAN MEDAN LISTRIK Wenas, Donny
FRONTIERS: JURNAL SAINS DAN TEKNOLOGI Vol 2, No 3 (2019): DESEMBER 2019
Publisher : Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (841.886 KB)

Abstract

Penelitian ini bertujuan untuk mengkaji efek surfaktan (efek permukaan substrat) silane dan pengaruh medan listrik luar dalam proses deposisi pada sifat film yang terbentuk serta kajian mekanisme penjangkaran yang dapat menghasilkan film tipis DR-1 dengan sifat-sifat permukaan rata, halus, ketebalan homogen, stabilitas struktur dan sifat optik yang menarik. Selain itu juga dikaji indeks bias film yang dihasilkan dan pengaruh medan listrik luar tersebut pada sifat optik film DR-1. Untuk tujuan itu dalam penelitian ini telah dikembangkan metode Physical Vapor Deposition (PVD) berbantuan medan listrik luar yang bervariasi. Hasil rekaman citra SEM menunjukkan bahwa dengan bantuan medan listrik luar, film yang dihasilkan menunjukkan keteraturan struktur yang meningkat dengan ditandai terbentuknya struktur kristalin dalam film pada medan sekitar 3,3 MV/m. Analisis data RAS-FTIR menunjukkan terjadinya ikatan hidrogen antara molekul DR-1 yang terdeposisi dengan substrat silane, hasil ini mendukung stabilitas struktur film berkat mekanisme penjangkaran (anchoring) yang kuat. Pengukuran reflektometer pada film DR-1 menunjukkan kenaikan indeks bias optik sebagai akibat dari peningkatan medan listrik luar dalam proses deposisi film DR-1 di atas substrat silane dengan metode PVD berbantuan medan listrik. Ini menunjukkan bahwa pengendalian indeks bias film dikontrol oleh pengaturan medan listrik luar.
PELATIHAN PENGGUNAAN PERALATAN LABORATORIUM FISIKA MATERIAL DAN RISET BAGI GURU-GURU FISIKA SMA SE KOTA MANADO Donny R Wenas
ABDIMAS: JURNAL PENGABDIAN KEPADA MASYARAKAT Vol 11, No 2 (2018): AGUSTUS 2018
Publisher : LPPM UNIMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (946.775 KB) | DOI: 10.36412/abdimas.v11i2.888

Abstract

Kemampuan melaksanakan kegiatan praktikum/demonstrasi dan mengembangkan materi pembelajaran berbasis laboratorium adalah salah satu kompetensi guru fisika. Peningkatan kemampuan tersebut akan meningkatkan daya saing lulusan siswa. Tujuan pelaksanaan kegiatan pengabdian pada masyarakat ini adalah: 1) memperkenalkan pengetahuan tentang laboratorium Fisika material dan Riset bagi guru Fisika SMA se kota Manado; 2) memberikan pelatihan keterampilan penggunaan peralatan laboratorium Fisika material dan riset bagi guru Fisika SMA se kota Manado; 3) menjelaskan manfaat karakterisasi peralatan laboratorium Fisika Material dan Riset bagi guru Fisika SMA se kota Manado; dan 4) menjalin kerja sama antara dunia kerja yaitu Sekolah dengan Perguruan Tinggi (UNIMA) agar tercipta keserasian tentang kebutuhan Sumber Daya Manusia dilapangan dan kurikulum yang diterapkan khususnya pada Program Studi Fisika FMIPA UNIMA. Metode yang dilakukan adalah ceramah, demonstrasi, peragaan, diskusi dan evaluasi. Kegiatan ini akan menghasilkan produk berupa buku panduan bagaimana dan apa yang harus dilakukan dalam mengoperasikan peralatan laboratorium fisika material dan riset. Buku panduan akan dirancang semenarik mungkin disertai gambar dan keterangan serta langkah-langkah dalam mengoperasikan alat laboratorium. Disamping buku panduan, akan dibuat juga buku ajar tentang konsep dan teori terkait dengan peralatan laboratorium fisika material dan riset serta artikel ilmiah. Berdasarkan kegiatan yang dilaksanakan, maka diperoleh hasil sebagai berikut: 1) para peserta (Guru fisika SMA) mengenal pengetahuan tentang spektroskopi UV-Vis (Ultra Violet Visible); 2) memahami pengetahuan tentang spektroskopi FTIR (Fourier Transform Infra red); 3) mengenal pengetahuan tentang SEM-EDX (Scanning Electron Microscopic-Energy Dispersive X-Ray Spectrometric); dan 4) mampu mengoperasikan alat spektrometer UV-Vis, FTIR, dan SEM-EDX.
ANALISIS PANDU GELOMBANG MENGGUNAKAN BRAGG RELECTOR SEBAGAI CLADDING Donny R. Wenas
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 1 (2020): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i1.56

Abstract

This study aims to examine the mode that can pass through the waveguide and calculate the filling factor and efficiency of the Bragg Reflector. For that purpose in this research, a program using Matlab has been created to analyze the propagation data of the waves in the material, cylindrical waveguides, and Bragg reflectors. From the results of this study, it has been found that a cylindrical perforated waveguide with a Bragg Reflector as a cladding, is one way to overcome the chromic dispersion of optical fiber materials. This is because the electromagnetic waves traveling through the air (n=1) do not experience dispersion. The replacement of the core material with air requires a sheath that acts as a reflector at a certain wavelength, this sheath is known as a Bragg Reflector. The calculation of the band structure of the Bragg Reflector shows the presence of a bandgap in the coordinates. This pair in the bandgap area experiences the reflection required for the waveguide. From the continuity requirement, the forbidden bandgap shows the mode that can propagate in the optical fiber, the efficiency is calculated and the amplitude and power profile graphs are plotted. From the results of the calculations performed, it is found that each mode has an efficiency of more than 60% and increases for wider cores, both for single-mode and multi-mode.
PENGARUH MEDAN LISTRIK TERHADAP ORIENTASI MOLEKUL DISPERSE RED-19 TERDEPOSISI DI ATAS SUBSTRAT SILANE DENGAN METODE PHYSICAL VAPOR DEPOSITION Deitje Sumolang; Donny Royke Wenas; Alfrits Komansilan
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 2 (2020): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i2.85

Abstract

Molecular Disperse Red 19 (DR-19) is known as a potential material for photonic device applications such as optical switching and optical data storage. For the application of this photonic device, a good quality film is needed, which has a flat surface, homogeneous thickness, optical stability, and good optical properties.This study aims to examine the effect of the silane substrate surface and the external electric field of 3.3 MV / m in regulating the molecular orientation of the DR-19 film on the silane substrate surface.The fabrication method used is the PVD (Physical Vapor Deposition) method assisted by an external electric field. The film was made on the surface of the silane substrate with the deposition of DR-19 molecules in a variety of external electric fields, namely no electric field (zero field) and the electric field E = 3.3 MV / m. The films were analyzed and characterized using X-ray diffraction spectroscopy (XRD). The results of the X-ray diffraction measurement analysis show that the DR-19 molecules are stacking perpendicular to the surface of the silane substrate, which shows an indication of the strong surfactant effect of the substrate from the hydrogen bonding of the DR-19 molecule with silane substrate. The results of spectroscopic measurements show that with the increase in the external electric field, there is an increase in the effect of aggregation of molecules arranged in an orderly manner perpendicular to the surface of the silane substrate.
STUDI IKATAN HIDROGEN PADA ORIENTASI MOLEKUL DISPERSE RED-1 DENGAN METODE PVD BERBANTUAN MEDAN LISTRIK Johana P. Tampi; Donny Royke Wenas; Marianus
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 2 (2020): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i2.88

Abstract

Organic molecules with a conjugated chain structure such as the Disperse Red-1 (DR-1) molecule are known as potential materials for photonic device applications. The aim of this research is to study the surface effect of Indium Tin Oxide (ITO) substrate and the external electric field of 2.6 MV / m in regulating the orientation of the DR-1 film molecules on the surface of the ITO substrate. The fabrication method used is the PVD (Physical Vapor Deposition) method assisted by an external electric field. This method is a modification of the conventional PVD method which is equipped with the addition of an external electric field (E) in the chamber. The film was made on the surface of the ITO substrate with the deposition of DR-1 molecules in a variation of the external electric field, namely zero field and E = 3.3 MV / m. The films were analyzed and characterized using XRD (X-Ray Diffraction) spectroscopy. The X-ray diffraction measurement analysis showed that the DR-1 molecules were arranged in an orderly manner parallel to the surface of the ITO substrate, indicating an indication of the strong surface effect of the ITO substrate from the hydrogen bonding of the DR-1 molecule with the ITO substrate. The results of spectroscopic measurements show that with an increase in the external electric field, there is an increase in the effect of aggregation of molecules arranged in an orderly manner perpendicular to the surface of the ITO substrate.
STUDI KARAKTERISTIK BATUAN MANIFESTASI PANAS BUMI DI SEKITAR GUNUNG TAMPUSU Oliver Pongoh; Donny Royke Wenas; Theresje Mandang
Jurnal FisTa : Fisika dan Terapannya Vol 1 No 2 (2020): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v1i2.93

Abstract

North Sulawesi is one of the provinces in Indonesia which has many active volcanoes. Mount Tampusu is an area that has geothermal prospects characterized by geothermal manifestations on the surface, namely hot springs that can contribute to or influence the surrounding rocks making altered rocks within the scope of hot spring manifestations. This study aims to identify the mineral composition and type of alteration rock in the geothermal manifestation area around Mount Tampusu at the study site using SEM-EDX and FTIR methods to determine hydrothermal minerals present in these rocks. The results showed that the mineral composition of altered rock mineral in the geothermal manifestation in Tampusu Village, Remboken District had almost the same content between the rocks in the eyes of the hot springs (where the water came out) and those that were a few meters away from the manifestation, namely Al (Aluminum), Si ( Silica), S (Suklur). With the difference in elemental content, sample 2 has the addition of Al (Aluminum), Si (Silica), MoL (Molybdenum), K (Potassium), Fe (Ferum). And the types of altered rock minerals around the hot spring manifestations in rock samples 1 and 2 are Quartz, Montmonillonitre, Albite, Kaolinite, Gibbsite and Paligorskile.
ANALISIS TEMPORAL DISTRIBUSI TEMPERATUR PERMUKAAN MANIFESTASI PANAS BUMI MENGGUNAKAN CITRA LANDSAT 8 UNTUK MENGETAHUI ARAH LATERAL PANAS DI SEKITAR GUNUNG TAMPUSU Brigitta Maria Rumondor; Donny Royke Wenas; Anneke T. Rondonuwu
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 1 (2021): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v2i1.100

Abstract

Geothermal energy is one of the alternative energy sources that are environmentally friendly and can help meet the world's energy needs. This requires optimization of geothermal potential, one of which is the area around Mount Tampusu. This study aims to map the distribution of surface temperature around Mount Tampusu using Landsat 8 TIRS imagery and to know the difference in temperature distribution in the area around Mount Tampusu in the time period for taking data from the Landsat 8 TIRS image sensor, to determine the lateral direction of the Heat in the area. The Remote Sensing Method is an effective method used in Geothermal exploration activities through the Ilwis software. The temperature distribution is obtained from resampling the thermal band image of the Landsat 8 satellite (limiting the study area) so that the data is ready to be processed without geometric or radiometric correction processes then converted to get the surface temperature. Based on this research, it can be concluded that the temperature distribution in the area around Mount Tampusu using Landsat 8 TIRS imagery ranges from 15.2 ºC to 32.2 ºC. There was a significant change from 2016 to 2017. Meanwhile, in 2018 the temperature increased to 17 ºC from the previous year.
ANALISIS PENGARUH SUHU DAN TEKANAN UDARA TERHADAP DAYA ANGKAT PESAWAT DI BANDARA SAM RATULANGI MANADO PERIODE 2010-2019 MENGUNAKAN METODE KORELASI PEARSON PRODUCT MOMENT Kevin C. Emor; Rolles Nixon Palilingan; Donny Royke Wenas
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 1 (2021): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v2i1.103

Abstract

Temperature and air pressure are two elements of meteorology that are interrelated because air pressure together with temperature will determine the air density and will then determine the lift of an airplane. One of the disturbances that affect flight operations (lift) is temperature and air pressure. Research has been carried out, namely to determine the effect of air pressure and air temperature on flight operations (lift). Pearson Product Moment Correlation Analysis Method is a method used to determine how much the value of the relationship between temperature and air pressure on flight operations (lift) .From the results of research at Sam Ratulangi airport in Manado, it shows that the relationship between temperature and air pressure is very strong on flight operations in particular (Lift) on the airplane. By using data on F - Klim 71 in 2010 - 2019 the strongest relationship occurred in November and December with the determining coefficient values ​​of 97.29% and 99.91. Air pressure and air temperature together have a strong influence on flight operations specifically "lift". Meanwhile, air temperature tends to have a stronger influence on flight operations (lift) than air pressure.
PENENTUAN TIPE FLUIDA DAN GUGUS FUNGSI MANIFESTASI PANAS BUMI KAWAH TUA GUNUNG API SOPUTAN Ronaldo J. Toar; Donny Royke Wenas; Theresje Mandang
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 1 (2021): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v2i1.106

Abstract

Indonesia is a country that has the largest geothermal resources in the world which is directly proportional to the number of volcanoes. Indonesia is an archipelagic country located at three junction of active mountain plates, namely the Eurasia, Indo-Australia and Pacific plates. Where Indonesia is also located in an active ring of fire that is associated with active volcanoes in Indonesia. North Sulawesi is one of the provinces in Indonesia which has several active volcanoes, one of which is the object of research is Mount Soputan. This volcano is located in South Minahasa and Southeast Minahasa Districts, North Sulawesi Province. The method used in this research is descriptive method and analysis of geothermal fluid chemical data. Analysis of the ion content in the fluid using a SpectroDirect Photometer. As well as functional group analysis using the FTIR Spectroscopy method (Fourier Transform Infra Red), this method is an infrared spectroscopy method equipped with Fourier transform for its spectrum analysis. Geothermal manifestation fluid in the Old Crater of Mount Soputan Volcano is a bicarbonate type of fluid with an HCO3 content of 479 ppm. The high HCO3 content is thought to be associated with the increase in geothermal fluids containing gas, especially CO2, which then experiences condensation in shallow aquifers.
PROFIL VERTIKAL DAN LUAS BIDANG DINAMIKA HARIAN GRADIEN SUHU UDARA DI ATAS PERMUKAAN LAHAN TERBUKA, LAHAN BERVEGETASI DAN PERMUKAAN ASPAL Givraldi Kumentas; Donny Wenas; Alfrie Rampengan; Christophil Medellu
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v2i2.134

Abstract

This study aims to determine the temporal function model, spatial temperature and dynamic models of air temperature gradients over the surface of open land, vegetated land, and asphalt surface. The research location is at the State University of Manado in the hills of Tonsaru South Tondano, Minahasa Regency. The research methodology was carried out on three transects at nine altitude positions for 24 hours of measurement time, measuring positions ranging from the ground level to 0cm, 10cm, 30cm, 60cm, 100cm, 150cm, 220cm, 300cm, to 400cm. Data processing carried out in this study is by entering data on air temperature, the measured ground surface into the Matlab application. It can be shown that temporal changes and vertical spatial variations in air temperature show different but relatively the same curve shapes in hot weather conditions during the day, expressed by using a mathematical model of the Fourier function and daily dynamics of air temperature gradients on various land surfaces is influenced by the process of heat absorption and thermal emission processes from the soil in various lands.
Co-Authors Alfrie Musa Rampengan Alfrits Komansilan Armstrong F. Sompotan Asmaul Husna S Bethrany F. Landung Brigitta Maria Rumondor Budi Mena Chikita Hulungo Christophil Medellu Cyrke A N Bujung Deitje Sumolang Drili Lidya Cintana Meruntu Farly Reynol Tumimomor Geraldi Saputera Kapoh Geraldy Wawondatu Givraldi Kumentas Heindrich Taunaumang Indra S. J. Oping Iwan Sixtus Umboh Jeferson Polii Jeilen Gabriela Nikita Nusa Johana P. Tampi Jonathan J. Wuisan Kevin C. Emor Makahinda, Florstin Celine Marianus Noldy Pulingkareng Oliver Pongoh Omie Jawongkay Rampengan, Alfrie M. Ridel Raturandang Risma P. Sambolayuk Rolles Nixon Palilingan Ronaldo J. Toar Rondonuwu, Anneke T Satyano W Mongan Selfie Tumbel Sixtus I. Umboh Sorongan, Christina Theresje Mandang Treesje K. Londa Vistarani Arini Tiwow Waren Cristoper Anthe Watulingas, Aldo Nandito