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All Journal JURNAL FISIKA Jurnal Ilmiah Biosaintropis (Bioscience-Tropic) Jurnal Biologi Tropis JMM (Jurnal Masyarakat Mandiri) ORBITA: Jurnal Pendidikan dan Ilmu Fisika KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Jurnal Pengabdian Magister Pendidikan IPA Jurnal Pendidikan Fisika dan Teknologi EIGEN MATHEMATICS JOURNAL Indonesian Physical Review Jurnal Pengabdian Masyarakat Sains Indonesia Jurnal Warta Desa (JWD)

Dian Wijaya Kurniawidi

Program Studi Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Mataram

Author-ID : 3344294

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Library & Information Science Mathematics Physics Public Health Social Sciences Other

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EKSTRAK GETAH PEPAYA (Carica Papaya) DENGAN PENAMBAHAN Cu SEBAGAI DYE SENSITIZER SOLAR CELL (DSSC) Dian Wijaya Kurniawidi; Siti Alaa; Susi Rahayu
Indonesian Physical Review Vol. 1 No. 1 (2018)
Publisher : Universitas Mataram

Indonesia is a biodiversity country. Abundance of biological resources may encourage researchers to optimize its use. As an example papaya trees are utilized as raw material for thin films. Sap of papaya latex is doppinged with Cu. This composition is depositioned on top of FTO by spin coating method. The addition of Cu dopping aims to control the rate of crystallinity of the material. This research will add Cu between 10% and 50% solution. Based on FTIR test results, flavonoid compounds might be obtained with O-H group, some aromatic rings C = C and C = O, aliphatic compounds C-H and -CO. Flavonoid compounds are potentially utilized as dye for DSSC. The thickness of dye produced by doping Cu 10% is approximately (0.5-2) μm. Furthermore, dopping Cu from 20% to 40% can produce thickness around 10-50 nm. Meanwhile, the results of the XRD test show an effective Cu between 10% to 40%.

SPEKTRO PLUVIOMETER SEBAGAI ALAT PENENTU DIAMETER DAN KECEPATAN JATUH BUTIRAN HUJAN Yulia Satriadi; I Wayan Sudiarta; Dian Wijaya Kurniawidi
Indonesian Physical Review Vol. 3 No. 1 (2020)
Publisher : Universitas Mataram

Cuaca merupakan gejala alam yang terjadi dalam waktu yang relatif singkat, dan perubahan cuaca yang tiba-tiba dapat menimbulkan kejadian bencana alam. Fenomena cuaca yang berdampak langsung antara lain adalah hujan. Dalam penelitian ini dilakukan penentuan diameter dan kecepatan jatuh butiran hujan. Diameter dan kecepatan jatuh butiran air yang dihasilkan dapat dijadikan sebagai pemodelan butiran hujan yang bermanfaat untuk mitigasi bencana. Penelitian ini menggunakan metode optical spektro pluviometer yang dilengkapi dengan laser diode sebagai pemancar cahaya dan sensor cahaya TEMT6000 sebagai penerima cahaya. Prinsip kerja spektro pluviometer berdasarkan perubahan tegangan yang dihasilkan oleh butiran hujan ketika menghalangi cahaya ke sensor. Diameter butiran air yang terukur yaitu diameter butiran air hasil observasi (Dobs) berkisar pada rentang 3,8 mm – 5,7 mm, diameter butiran air hasil model (Dmod) berkisar pada rentang 3,6 mm hingga 5,5 mm. Kecepatan jatuh butiran air hasil observasi (vobs) pada rentang 0,98 m/s – 1,7 m/s dan hasil kecepatan jatuh butiran air hasil model (vmod) pada rentang 0,9 m/s hingga 2,5 m/s.

THE THICKNESS OF A THIN FILM SYNTHESIZED FROM LIDAH MERTUA PLANT (SANSEVIERIA TRIFASCIATA) USING A DIP COATING METHOD Ervina Sandra Dewi; Siti Alaa; Dian Wijaya Kurniawidi; Susi Rahayu
Indonesian Physical Review Vol. 2 No. 3 (2019)
Publisher : Universitas Mataram

A study has been conducted on the characterization of optical properties of thin films from lidah mertua (Sansevieria trifasciata) with dip coating method. The dip coating method was applied with different temperature and different time immersion treatments. The measuring variables in the manufacture of this thin film were tested based on the optical properties of their absorbance value of the extract and the thicknessof thin film. The absorbance spectral of extraction pigments were measured using UV-Vis in the wavelength range 350 nm to 700 nm. The results of the measurements showed that the extract of the S. trifasciata has high absorbance. Beside that, the minimum coating thickness is produced by a concentration of 12.5% with a 5 minute immersion time of 520 nm.

THE STUDY OF GRAPHENE BAND GAP USING HATREE FOCK METHOD IN MOLECULAR SCALE Siti Alaa; Muhammad Fajrin; Eva Nurhaliza; Dian Wijaya Kurniawidi; Susi Rahayu; I Wayan Sudiarta
Indonesian Physical Review Vol. 3 No. 1 (2020)
Publisher : Universitas Mataram

Graphene is known as an advanced material that has good electrical conductivity and heat conductivity. To understand the nature of graphene it is necessary to calculate the energy, band gap and vibrate frequency at the nanoscale. One method that can be used is the ab initio calculation using the Hatree-Fock method. In this research, we performed a computational study of the electronic properties of grapheme within RHF/STO-3G basis set in different cluster molecules. From this study we get band gap for graphene in ab initio level, have a consistant value around zero. Using ab initio method, we can obtain a deeper understanding about the graphene behaviour at the molecular scale.

IDENTIFIKASI SIFAT FISIS KANDIDAT WAFER DARI LIMBAH TAHU SEBAGAI ALTERNATIF PAKAN TERNAK Susi Rahayu; Nurhidayati Nurhidayati; Dian Wijaya Kurniawidi; Siti Alaa
Indonesian Physical Review Vol. 4 No. 1 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i1.72

Inovasi pembuatan pakan ternak dalam sediaan wafer perlu dilakukan untuk menjadi alternatif pakan saat musim kemarau. Limbah tahu merupakan salah satu bahan dasar yang dimanfaatkan sebagai bahan pembuatan wafer. Tujuan penelitian ini untuk mengidentifikasi perlakuan yang direkomendasikan dalam pembuatan kandidat wafer berdasarkan karakteristik fisis wafer. Kandidat wafer ditinjau berdasarkan warna, kadar air, densitas wafer, densitas partikel, dan porositas. Proses pembuatan wafer dilakukan dengan proses pemadatan dan pemanasan. Sebelum serbuk limbah tahu dicetak, dipastikan dahulu kadar air pada serbuk limbah tahu sesuai dengan stadar SNI 3148:2:200. Suhu pemanasan serbuk limbah tahu yang direkomendasikan menggunakan suhu 100oC. Karakteristik serbuk limbah tahu yang dihasilkan yaitu serbuk berwarna putih, kadar air sebesar 14,1% dengan nilai densitas partikel serbuk limbah tahu(????sa ) 0,189g/cm3 serta porositas (????sa ) 0,216%. Sedangkan untuk proses pencetakan wafer, suhu pemanasan yang direkomendasikan yaitu 70oC. Kandidat wafer yang diperoleh menghasilkan warna putih, tahan hingga 4 minggu, kadar air 7,19%, densitas partikel (????p ) 0,254 g/cm3, densitas wafer 1,10 g/cm3 dan porositas ????w sebesar 3,47±0,0118%.

Analisis Tingkat Pencemaran Air Sungai Berdasarkan Kadar Fluorida Di Kota Mataram Menggunakan Metode Spektrofotometri UV-Vis Kholik Hidayatullah; Siti Alaa’; Hasmiyatni Hasmiyatni; Dian Wijaya Kurniawidi
Jurnal Ilmiah Biosaintropis (Bioscience -Tropic) Vol 7 No 2 (2022): Januari 2022
Publisher : Fakultas Matematika & Ilmu Pengetahuan Alam - Universitas Islam Malang

River water pollution levels can be analysed based on fluoride levels. Excessive fluoride levels will cause fluorosis of the bones. While fluoride deficiency will cause brittleness of teeth and thinning of bones. The purpose of this study was to determine the level of river water pollution based on fluoride levels in Mataram City. Fluoride levels were tested by adding a solution of zirconyl alizarin as a reagent and a solution of Na arsenite, which was then analysed by UV-Vis spectrophotometry with a wavelength of 535 nm. The results showed that the fluoride levels in the 7 tested samples met the fluoride quality standards. The highest fluoride content of river water in Mataram city is 1.046 mg/L, while the lowest is 0.213 mg/L. From this study it can be concluded that based from 7 points location water river sample in Mataram City are not polluted by fluoride.

IMPLEMENTASI TEKNOLOGI FILTRASI AIR DENGAN KOMPOSIT DARI KARBON AKTIF DAN CALSIUM OXIDE UNTUK MENINGKATKAN KUALITAS AIR Dian W. Kurniawidi; Siti Alaa; Bakti Sukrisna; Syamsuddin Syamsuddin; Susi Rahayu
JMM (Jurnal Masyarakat Mandiri) Vol 4, No 5 (2020): November
Publisher : Universitas Muhammadiyah Mataram

Abstrak: Kualitas air merupakan bagian penting dari kualitas lingkungan. Integrasi antar kualitas air, kualitas tanah, dan kualitas udara menentukan keberlanjutan pertanian untuk kesejahteraan hidup. Permasalahan turunnya kualitas air di Desa Pelangan Kabupaten Lombok Barat terjadi akibat aktivitas penambangan konvensional wargase kitar. Sehingga perlu dilakukan suatu kegiatan workshop implementasi teknologi filtrasi air agar dapat dimanfaatkan warga untuk meningkatkan kesejahteraan hidup. Salah satu metode filtrasi air yang sederhana dan efektif adalah dengan menggunakan komposit dari karbon aktif dikombinasikan dengan calcium oxide. Adapun kegiatan tersebut dilakukan dengan tiga tahapan yaitu persiapan, pelaksanaan, dan evaluasi. Secara garis besar, metode pelaksanaannya antara lain sosialisasi prototype alat, pendampingan pembuatan alat dan komposit, serta uji cobaalat. Teknologi filtrasi telah disosialisasikan fungsi alat, cara pembuatan alat dan cara pembuatan kompositnya.Bahan baku pembuatan komposit yaitu karbon aktif dari kayu bakau dan calcium oxide dari cangkang kerang dara. Sedangkan pembuatan prototype alat filtrasi memanfaatkan pipa air. Hasil dari kegiatan ini, warga mampu membuat alat filtrasi air yang dapat meningkatkan kualitas air. Sehingga dengan bekal pengetahuan tersebut warga dapat memanfaatkan metode ini untuk memperoleh air layak pakai. Adapun air tersebut dapat digunakan untuk berbagai keperluan salah satunya untuk bercocok tanam guna memenuhi kebutuhan hidup. Abstract:Water quality plays an important role in a natural environment. The integration between the quality of the water, the soil and the air determine the sustainability of agriculture for welfare. The fundamental problem occured in Pelangan Village, West Lombok Regency due to conventional mining activities conducted by local residents is a reduction of the water quality. So it is necessary to carry out a workshop on the implementation of water filtration technology in order that it can be used by residents to improve their welfare. Asimple and effective way in a water purification process is to use a a composite of activated carbon combined with calcium oxide. The activity is arranged in three stages, namely preparation, implementation and evaluation. In general, the method of implementation includes socialization of tool prototypes, assistance in creating instruments and composites, and assessment tools. The filtration technology has been disseminated about itsfunction, how to create tools and how to produce composites. The raw materials for fabricating composites are activated carbon from mangroves and calcium oxide from virgin shells. Meanwhile, assembling a prototype of a filtration device utilizes a water pipe.As a result of this activity, local communities were able to make water filtration devices that can improve water quality. So that with this knowledge, residents can take advantage of this method to obtain suitable water for use. The water can be used for various purposes, one of which is for farming to fulfil the daily needs.

SINTESIS ZEOLIT DARI BATU APUNG (PUMICE) DAERAH IJOBALIT LOMBOK TIMUR SEBAGAI ADSORBEN LOGAM Fe Dian W. Kurniawidi; Siti Alaa; Sri Mulyani; Susi Rahayu
ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika Vol 7, No 2 (2021): November
Publisher : Universitas Muhammadiyah Mataram

ABSTRAKAktivitas letusan besar Gunung Api Samalas di Lombok meninggalkan jejak mineral batuan beku salah satunya batu apung (pumice). Batu apung memiliki komposisi mineral utama berupa silika sebanyak 58,3%. Tujuan dari penelitian untuk identifikasi karakteristik zeolit dari batu apung sebagai adsorben logam Fe. Zeolite disintesis menggunakan metode kopresipitasi. Identifikasi gugus fungsi, kristalinitas, dan struktur kristal zeolite sintesis menggunakan FTIR dan XRD. Sedangkan analisis adsorbsi menggunakan AAS. Zeolit berhasil terbentuk dari sintesis batu apung ditandai dengan kemunculan gugus fungsi TO4 dan gugus fungsi Si-O-Si pada panjang gelombang 983,85 cm-1 dan 660,02 cm-1. Zeolit yang terbentuk dari proses sintesis batu apung yaitu tipe zeolit ZK-14 dengan struktuk kristal kubik. Adapun hasil analisis kemampuan adsorbs dari zeolite ZK-14 ini sangat baik mencapai 99,22% pada komposisi Si/Al pada 25/30. Sehingga sintesis batub apung menjadi zeolite dapat diaplikasikan sebagai penyerap logam Fe. Kata kunci: Adsorben; Batu Apung; Zeolit. ABSTRACTThe massive eruption activity of the Samalas Volcano in Lombok left traces of igneous rock minerals, one of which was pumice. The pumice has a main mineral composition of 58.3% silica. The purpose of this study is to identify the characteristics of zeolite from pumice as an adsorbent of Fe metal. Zeolite has been synthesized using a coprecipitation method. The identification of functional groups, crystallinity, and crystal structure of synthetic zeolite using FTIR and XRD. Meanwhile, AAS was implemented for the adsorption analysis. The zeolite was successfully formed from the synthesis of pumice characterized by the appearance of the TO4 functional group and the Si-O-Si functional group at wavelengths of 983.85 cm-1 and 660.02 cm-1. The zeolite fabricated from the pumice synthesis process is ZK-14 type zeolite with a cubic crystal structure. The examination results from the adsorption ability of zeolite ZK-14 are very good, reaching 99.22% at the Si/Al composition at 25/30. In fact, the synthesis of pumice into zeolite can be applied as an absorber of Fe metal. Keywords: Adsorbent; Pumice Stone; Zeolite.

Pemanfaatan Limbah Cangkang Kerang Mutiara (Pinctada Maxima) Sebagai Sumber Hidroksiapatit Susi Rahayu; Dian W Kurniawidi; Abdul Gani
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 4 No 2 (2018): Juli-Desember 2018
Publisher : Department of Physics Education, Universitas Mataram

Pearl shells (pinctada maxima) are the superior commodities in West Nusa Tenggara Province. The shellfish is utilized as a producer of pearls while the waste of pearl shells has not been widely used by the community. Main composition of fhe pearl shells is calcium. CaO content was tested using AAS and obtained CaO in shells as much as 52.23%. CaO is used as a source of hydroxyapatite (HAp). Shellfish powder is synthesized with H3PO4 compound. Synthesis is conducted by precipitation method. Synthesis results were analyzed utilizing XRD and FTIR. From the examination, HAp compounds were identified. Group of PO43, CO32, and OH are constituent groups of HAp compounds. Moreover, another calcium phosphate is formedÃÂ namely TCP. This HAp compound has a maximum crystallinity of 78.33% at an angle of 77.18 ÃÂ°. The smallest HAp particle size at an angle of 31.92 ÃÂ° is 1.4 ÃÂ¼m. The degree of high crystallinity is influenced by high intensity and a wide FWHM. Meanwhile, the small molecule size is acquired on a wide FWHM with a small Bragg angle position.

PENGARUH FLOURIDE TERHADAP SIFAT MEKANIK GIGI TIRUAN BERBAHAN DASAR LIMBAH CANGKANG TELUR AYAM Baiq R. S. Yusuf; Siti Alaa; Dian W. Kurniawidi; Susi Rahayu
KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Vol 4 No 1 (2019): KONSTAN (Jurnal Fisika dan Pendidikan Fisika)
Publisher : Universitas Islam Negeri (UIN) Mataram

The fabrication of dentures from the eggshell has been done using the precipitation method. FTIR and AAS tests were carried out to determine the functional groups and calcium oxide content in egg shells. From the AAS results, the CaO value is 58.33% which is much greater than the minimum standard CaO in dentures. Mechanical tests were carried out on dentures treatment with immersion into distilled water and the results were compared if immersion using fluoride toothpaste. It was found that immersion with fluoride toothpaste can increase the elasticity of dentures by more than 100%.

Co-Authors ABDUL GANI Alaa, Siti Amrul Ikhsan Baiq Nurul Alya Baiq R. S. Yusuf Bakti Sukrisna Ervina Sandra Dewi Eva Nurhaliza Gaoura Valentina Hasmiyatni Hasmiyatni I Gusti Ngurah Yudi Handayana I Wayan Ari Makmur I Wayan Sudiarta Irma Pratiwi Iwan Sumarlan Kholik Hidayatullah L. Sahrul Hudha Marlita Yudiawati Mar’atus Solihah Muhammad Fajrin Muhammad Zuhdi Nadila Rahmawati Nanik Andelita Nurhidayati Nurhidayati Nurul Qomariyah Ridho Ahyana Rinarto Subroto Ronodirdjo, Muhammad Zuhdi Sinta Devi Hariyanti Siti Alaa’ Sri Mulyani Susi Rahayu Syahrial Ayub Syahrial Ayub Syamsuddin Syamsuddin Syamsuddin Syamsuddin Syamsuddin Teguh Ardianto, Teguh Wirawan, Rahadi Yulia Satriadi

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