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All Journal Jurnal Neutrino : jurnal fisika dan aplikasinya JURNAL FISIKA JFA (Jurnal Fisika dan Aplikasinya) Journal of Physics: Theories and Applications SEMAR Molekul: Jurnal Ilmiah Kimia Proceeding Seminar Nasional IPA Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Pendidikan IPA Indonesia International Journal of Science, Technology and Applications
Risa Suryana
Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Sebelas Maret, Jl. Ir. Sutami No. 36 A Kentingan, Surakarta 57126
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Social Sciences

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THE EFFECT OF NANO ZnO MORPHOLOGY ON STRUCTURE, DIELECTRIC CONSTANT, AND DISSIPATION FACTOR OF CA-NANO ZnO/ITO FILMS Mustikasari, Ayu Azrurin; Diantoro, Markus; Mufti, Nandang; Suryana, Risa
Jurnal Neutrino Vol 10, No 2 (2018): April
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (666.081 KB) | DOI: 10.18860/neu.v10i2.4924

Abstract

Research to utilize natural polymers continues to be driven primarily by utilization as an environmental friendly energy-generating and storage material. The high porosity makes cellulose acetate (CA) a good candidate as a dielectric material as the basis of the supercapacitor device. Various dopants and compositions have been widely used, but the nano size morphological differences of the same material are rarely reported. Two types of ZnO are prepared, i.e., nanoparticles and nanorods deposited with CA and deposited on ITO glass substrate. The CA-ZnO / ITO composite film was fabricated through spin coating technique. This study focused on ZnO morphological difference on the microstructure and the dielectricity of CA-ZnO /ITO composite films. The morphology of nanoparticles and nanorods of ZnO were analyzed more detail with respect to its microstructure and dielectric properties. It is revealed that the change of ZnO morphology from nanoparticles to nanorod increase the capacitance and dielectric constant significantly from the order of the nano to the micro and decrease the dielectric loss. The dielectric constant of CA-ZnONP/ITO and CA-ZnONR/ITO are respectively of 2569 and 97159 at 100 Hz. The capacitance and dielectric loss of CA-ZnONP/ITO and CA-ZnONR/ITO reach to 69.809 nF; 678 and 2,15765 µF; 13,23 respectively. 
Pengaruh Komposisi Campuran Antosianin-Klorofil sebagai Fotosensitizer terhadap Efisiensi Dye Sensitized Solar Cell Maya Dwi Fistiani; Fahru Nurosyid; Risa Suryana
Jurnal Fisika dan Aplikasinya Vol 13, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.717 KB) | DOI: 10.12962/j24604682.v13i1.2132

Abstract

IntisariArtikel ini membahas fabrikasi Dye Sensitized Solar Cell (DSSC) dengan menggunakan campuran dye antosianin dan klorofil sebagai fotosensitizer. Pencampuran dye bertujuan untuk memperlebar daerah serapan dye alami. Antosianin diekstraksi dari kol merah sedangkan klorofil dari daun bayam dengan metode maserasi. Komposisi dye divariasikan dengan perbandingan larutan antosianin:klorofil, yaitu 1:3, 1:1, dan 3:1. Variasi komposisi dilakukan untuk mengetahui pengaruh perubahan serapan dye terhadap efisiensi DSSC. Karakterisasi sifat optik menggunakan spektrofotometer UV-Vis, sedangkan karakterisasi sifat listrik denganI-V meter. Hasil karakterisasi menunjukkanbahwa pada perbandingan 1:3memiliki absorbansi tertinggi pada rentang panjang gelombang 400 nm hingga 450 nm dan efisiensi sebesar0,15%.ABSTRACTThis article is about fabrication of Dye Sensitized Solar Cell (DSSC) using mixture of anthocyanin and chlorophyllas fotosensitizer. Mixing dye aims to widen the absorbance area of natural dye.Anthocyanin is extracted from red cabbage andchlorophyll from spinach leaves with maseration methode. Mixture composition of dye anthocyanin:chlorophyll varying at 1:3, 1:1, and 3:1. Composition variation is performed to determine the effect of absorbance change on the efficiency of DSSC. Optic characterization using UV-Vis spectrophotometer and electric characterization using I-V meter. The characterization result showed that rasio 1:3 hasthe highest absorbance at wavelength 400 nm to 450 nm with highest efficiency 0,15%.
Pengaruh Variasi Rapat Arus pada Pembentukan Silikon Berpori di atas Permukaan Si (111) Tipe-P dengan Metode Anodisasi Elektrokimia Sehati, Sehati -; Wijayanti, Siti; Kusumandari, Kusumandari; Suryana, Risa
Jurnal Fisika Vol 11, No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v11i1.28396

Abstract

Silikon berpori (PSi) telah terbentuk di atas substrat Si (111) tipe-p menggunakan metode anodisasi elektrokimia. Permukaan silikon dianodisasi dalam larutan HF (40%) dan Etanol (96%) dengan perbandingan 1:1 pada rapat arus 70 mA/cm2, 80 mA/cm2, dan 90 mA/cm2 selama 6 menit. Plat platina sebagai katoda sedangkan silikon sebagai anoda dengan jarak 5 cm. Reflektansi PSi dikarakterisasi dengan Spektroskopi UV-Vis dan morfologi permukaan PSi dikarakterisasi dengan AFM. Kedalaman, lebar, dan kekasaran PSi meningkat dengan bertambahnya rapat arus. Hasil pengukuran pori menunjukkan nilai lebar pori (μm) lebih besar dari nilai kedalaman pori (nm). Hasil tersebut memperlihatkan bahwa proses etching arah horizontal lebih cepat dari arah vertikal. Pori yang terbentuk pada PSi diklasifikasikan jenis makropori karena lebar porinya berukuran (50nm). Reflektansi PSi menurun dengan meningkatnya rapat arus. Osilasi reflektansi terjadi  pada lapisan PSi karena adanya foton yang dipantulkan dengan sudut yang berbeda karena adanya perbedaan kedalaman pori yang terbentuk. Hasil karakterisasi AFM dan hasil karakterisasi reflektansi menunjukkan permukaan PSi yang terbentuk tidak homogen. Lapisan PSi yang terbentuk memiliki potensi sebagai lapisan anti-reflective.
Pemanfaatan Gold Nano Particles Untuk Deteksi Dan Terapi Kanker Pada Manusia Ali, Lalu Usman; Suryana, Risa; Taher, Tamrin
International Journal of Science, Technology and Applications Vol 2 No 1 (2024): Volume 2 Number 1 Tahun 2024
Publisher : Alpatih Harapan Semesta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70115/ijsta.v2i1.207

Abstract

Research on the utilization of Gold Nanoparticles (GNPs) has rapidly advanced in recent decades, particularly in the biomedical field for cancer detection and therapy. GNPs have unique characteristics, such as nanometer size, high chemical stability, modifiable optical properties, and good biocompatibility, making them ideal candidates for applications in nanomedicine. This literature reviews the utilization of GNPs in cancer detection through local surface plasmon resonance (LSPR)-based imaging techniques, signal enhancement in Raman spectroscopy, and the delivery of specific diagnostic agents. Additionally, in cancer therapy, GNPs are used for photothermal, photodynamic, and targeted drug delivery, which can enhance therapeutic efficacy and reduce side effects on healthy tissues. This literature review also covers the main challenges in the development of GNP-based technologies, including toxicity, in vivo stability, and production scalability. The results of this study indicate that GNPs have great potential for clinical application, although further research is needed to address technical and ethical constraints before they can be widely implemented in cancer treatment in humans
STUDI KEBUTUHAN PENGEMBANGAN E-MODUL AJAR BERBASIS STEAM UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KOMPUTASIONAL DAN KREATIF PESERTA DIDIK Haqiqi, Haqiqi; Titian, Kharisma; Wahyuningsih, Daru; Suryana, Risa
Proceeding Seminar Nasional IPA 2025
Publisher : LPPM UNNES

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk menganalisis kebutuhan guru terhadap pengembangan e-modul ajar berbasis STEAM untuk meningkatkan kemampuan berpikir komputasional dan kreatif peserta didik. Penelitian menggunkaan metode campuran sekuensial ekplanatori dengan teknik pengumpulan data melalui kuesioner kepada 30 guru sesuai dengan kriteria dan wawancara kepada 10 guru fisika di SMA wilayah Kabupaten Ponorogo yang dipilih secara acak. Hasil analisis menunjukkan 66,67% Guru fisika sangat setuju dan 33% setuju bahwa pengembangan e-modul ajar berbasis STEAM diperlukan. Hasil ini mengindikasikan adanya kebutuhan terhadap perangkat ajar yang mampu terintegrasi dengan unsur STEAM guna mendukung pengembangan kemampuan berpikir komputasional dan kreatif peserta didik.
Novel Approach in Enhancing Science Education through Problem-Based Creative Learning and Delphi Evaluation Annur Indra Kusumadani; Affandy, Harry; Sunarno, Widha; Suryana, Risa; Harjana, Harjana; Andiena, Resty Zama
Jurnal Pendidikan IPA Indonesia Vol. 13 No. 4 (2024): December 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/va3g8p17

Abstract

The research aimed to optimize the Problem-Based Creative Learning (PBCL) model to enhance higher-order thinking skills (HOTS) in natural science learning. The research used the Delphi method, which involved seven experts in education from various disciplines contributing to a cycle of Delphi. The Delphi cycle consisted of two cycles, and data analysis involved using the Aiken V statistical equation. The Delphi study results highlighted agreement on the characteristics of the PBCL model, which included (1) syntax, (2) social system, (3) principles of reaction, (4) support system, and (5) the impact of learning. The research findings highlight the potential of PBCL as an innovative learning model in natural science learning, emphasizing its effectiveness in improving aspects of analysis, evaluation, and creation as part of HOTS. The study contributes a learning model framework for educators to strengthen natural science education and cultivate insightful and adaptive students in the 21st century.
Ag-TiO2 for Efficient Methylene Blue Photodegradation Under Visible Light Irradiation Widiyandari, Hendri; Nashir, Muhammad; Parasdila, Hanaiyah; Almas, Khanza Fadhilah; Suryana, Risa
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 4 Year 2023 (December 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.19885

Abstract

Photocatalysis is one of the environmentally friendly methods for degrading down wastewater contamination. TiO2 as one of the photocatalyst material is claimed can enhance the photocatalytic activity much better, if the band gap energy is reduced. In order to reduce the bandgap energy of TiO2, the novel in this research is that the temperature variations over a 24-hour period at 100 °C, 120 °C, 140 °C, and 160 °C in hydrothermal process to synthesize the photocatalyst material with Ag-doped. Diffraction patterns of Ag-TiO2 show that all sample have tetragonal crystal structure and an anatase phase which also has excellent crystallinity. Some of the nanoparticles on the surface of Ag-TiO2 have a consistent morphology, while other particles are formed irregularly. According to the DRS UV-Vis result, bandgap energy reduced as temperature increased (Eg = 3.2 eV to 2.32 eV). The results from PL Ag-TiO2 160 have the lowest intensity, which indicates a low rate of electron-hole recombination. The Ag-TiO2 160 sample produced the best photocatalytic activity, according to the results of the MB degradation test, with a relative change in concentration of 92.98% for 2 h under visible light. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Optimization of Silver Doping on Natural Dye Mixed Chlorophyll-Anthocyanin on The Efficiency of Dye Sensitized Solar Cells (DSSC) Pangesti, Desita Suci; Nurosyid, Fahru; Suryana, Risa; Iriani, Yofentina
Molekul Vol 20 No 3 (2025)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2025.20.3.16687

Abstract

ABSTRACT. This study aimed to incorporate silver (Ag) in the mixture of chlorophyll-anthocyanin dyes to improve DSSC efficiency. This research evaluated the impacts of various natural dye modifications with different concentrations of Ag incorporation on the DSSC performance. Here, anthocyanin (A) was extracted from butterfly pea flowers, while chlorophyll (C) was extracted from spinach leaves. The two dyes were mixed with a volume ratio of (anthocyanin: chlorophyll) 1:3. From the ratio of anthocyanin: chlorophyll, the extraction of anthocyanin solution is 25% and chlorophyll is 75%. Ag was incorporated into the dye mixture (AC) with distinct concentrations of 0%, 3%, and 5%. The dyes were characterized using a UV-Vis spectrophotometer and Keithley I-V meter to investigate their optical and conductivity properties. The DSSC performance was assessed with a Keithley I-V meter. The yields exhibited that the Ag incorporation improved the absorbances and widened the absorption area of the AC dyes as compared to the single and mixed dyes without Ag addition. Further, the results demonstrated that Ag incorporation enhanced the conductivity of the AC dyes, showing that the values were 4.43×10⁻² (Ωm)⁻¹, 6.46×10⁻² (Ωm)⁻¹, and 8,21×10⁻² (Ωm)⁻¹ for 0%, 3%, and 5% Ag incorporation. Moreover, the conversion efficiency values obtained by DSSCs prepared with AC dyes, Ag-incorporated AC 3%, and Ag-incorporated AC 5% were 0.073%, 0.209%, and 0.111%, respectively that Ag incorporation could significantly advance the DSSC performance. This study found that the AC dyes incorporated with 3% Ag were he optimal composition to produce the optimal DSSC performance. Keywords: anthocyanin, chlorophyll, DSSC, dye, silver
Microwave-assisted roasting time on Ilmenite Bangka Belitung extraction using hydrometallurgical method Mutakin, Ikbalul; Suryana, Risa; Septiani, Eka Lutfi; Arutanti, Osi; Widiyandari, Hendri
Journal of Physics: Theories and Applications Vol 8, No 1 (2024): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v8i1.90259

Abstract

Titanium Dioxide (TiO2) was extracted from Bangka Ilmenite through a hydrometallurgical process employing the microwave-assisted method using a 20% HCl solution. The highest crystallinity percentage in XRD result, reaching 75%, was achieved after a roasting duration of 25 minutes, with a corresponding crystallite size of  35.57 nm at the TiO2-Anatase phase's peak intensity of 25.24°. Analysis of the extracted ilmenite revealed alterations in its compound composition, notably an increase in TiO2 content. The most substantial increase in TiO2 content, rising to 69.7% from 33.76%, was observed after 25 minutes of roasting. UV–Vis spectroscopy revealed an energy band gap of 2.329 eV.
Edukasi Pengelolaan Sampah Organik di Yayasan Pendidikan Mutiara Insan Menuju Sekolah Berwawasan Mandiri Energi Kusumandari, Kusumandari; Suryana, Risa; Iriani, Yofentina; Nurosyid, Fahru; Widiyandari, Hendri; Khairuddin, Khairuddin
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 12, No 2 (2023): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v12i2.77098

Abstract

Sampah selalu menjadi permasalahan yang tak kunjung usai dan menjadi perhatian serius pemerintah Indonesia. Kesadaran masyarakat Indonesia dalam pengelolaan sampah masih harus terus ditingkatkan. Secara umum sampah dapat dikategorikan sebagai sampah organik dan non organik. Kedua jenis sampah tersebut sejatinya dapat dimanfaatkan lagi. Sebagai contoh dengan mendaur ulang sampah plastik menjadi barang-barang yang bermanfaat seperti vas bunga, pot, tempat pensil dan lain sebagainya Sedangkan sampah organik dapat dimanfaatkan untuk membuat pupuk kompos atau bahkan untuk sampah organik dalam jumlah banyak dapat dimanfaatkan sebagai sumber energi baru biogas. Oleh karenanya dalam usulan pengabdian ini, akan dilakukan edukasi pengelolaan sampah organik di Yayasan Pendidikan Mutiara Insan Sukoharjo. Yayasan Pendidikan Mutiara Insan membawahi beberapa institusi pendidikan yaitu SMPIT Mutiara Insan, SDIT Mutiara Insan dan TKIT/PAUD Mutiara Insan. Sebagai lembaga Pendidikan dengan kurikulum fullday, yayasan menerapkan kebijakan pemberian katering snack maupun makan siang setiap harinya. Selain berdampak positif, hal tersebut tentunya menimbulkan masalah karena banyaknya sampah organik yang berasal dari potongan sayuran maupun sisa makanan siswa. Berdasarkan latar belakang tersebut, maka diperlukan edukasi untuk membangun kesadaran pengelolaan sampah organik tersebut. Edukasi dengan pemberian materi in class tentang pengelolaan sampah menjadi energi alternatif biogas. Kegiatan diikuti oleh pemangku kebijakan dari Yayasan Mutiara Insan dan juga perwakilan pemerintah setempat. Dari hasil pelatihan, peserta merasa mendapatkan pencerahan mengenai sampah organik sebagai sumber energi alternatif dan siap mendukung penerapannya di Yayasan Mutiara Insan sebagai usaha mewujudkan sekolah yang berwawasan mandiir energi. Dari pengabdian ini diharapkan masyarakat mendapatkan kemanfaatan edukasi dan teknologi tepat guna dalam usaha pengelolaan sampah khususnya sampah organik. 
Co-Authors - Anita, - Affandy, Harry Agus Supriyanto Almas, Khanza Fadhilah Andiena, Resty Zama Annur Indra Kusumadani Arutanti, Osi Cari, Cari Daru Wahyuningsih Fahru Nurosyid Haqiqi, Haqiqi Harjana Harjana Hendri Widiyandari Khairuddin - Kusumandari, Kusumandari Lalu Usman Ali Markus Diantoro Maya Dwi Fistiani Muhammad Nashir Mustikasari, Ayu Azrurin Mutakin, Ikbalul Nandang Mufti Nurussaniah Pangesti, Desita Suci Parasdila, Hanaiyah Pusaka, Semerdanta Sehati, Sehati - Septiani, Eka Lutfi Taher, Tamrin Titian, Kharisma Widha Sunarno Wijayanti, Siti Yofentina Iriani