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KARAKTERISASI SIFAT OPTIK C-DOTS DARI KULIT LUAR SINGKONG MENGGUNAKAN TEKNIK MICROWAVE Putro, Permono Adi; Roza, Liszulfah; -, Isnaeni
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Carbon dots (C-dots) are a new type of phosphorescent nanoparticles that can be easily synthesized from natural sources or raw materials. The outer shell of cassava is the second waste obtained from cassava skin waste which is less attention to be utilized. Synthesis of C-dots from the outer shell of dried cassava has been successfully carried out with Microwave techniques. Synthesis of C-dots was carried out using water as a solvent with a variation of the concentration of precursor solutions to the microwave duration. Microwave duration causes changes in the structure and optical properties of C-dots. C-dots are characterized to study the optical properties of the UV-Vis absorbance spectrum and emission intensity in the form of emissions. The observed optical properties aim to determine the C-dots energy transition, such as surface and core energy. The core energy level becomes dominant in the transition Ï€â†’Ï€* compared to the transition of nâ†’Ï€* in surface energy when the C-dots concentration increases so that energy shifts. This phenomenon is known from the top of the broad C-dots emission spectrum and shifts to longer wavelengths. In addition, we suspect that the difference in C-dots emissions is caused by the molecular density and content of the preparation based on the concentration of precursor solutions and the length of microwave time.

KARAKTERISASI SIFAT OPTIK C-DOTS DARI KULIT LUAR SINGKONG MENGGUNAKAN TEKNIK MICROWAVE Putro, Permono Adi; Roza, Liszulfah; -, Isnaeni
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 11 No 2 Februari 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v11i2.894

Carbon dots (C-dots) are a new type of phosphorescent nanoparticles that can be easily synthesized from natural sources or raw materials. The outer shell of cassava is the second waste obtained from cassava skin waste which is less attention to be utilized. Synthesis of C-dots from the outer shell of dried cassava has been successfully carried out with Microwave techniques. Synthesis of C-dots was carried out using water as a solvent with a variation of the concentration of precursor solutions to the microwave duration. Microwave duration causes changes in the structure and optical properties of C-dots. C-dots are characterized to study the optical properties of the UV-Vis absorbance spectrum and emission intensity in the form of emissions. The observed optical properties aim to determine the C-dots energy transition, such as surface and core energy. The core energy level becomes dominant in the transition Ï€â†’Ï€* compared to the transition of nâ†’Ï€* in surface energy when the C-dots concentration increases so that energy shifts. This phenomenon is known from the top of the broad C-dots emission spectrum and shifts to longer wavelengths. In addition, we suspect that the difference in C-dots emissions is caused by the molecular density and content of the preparation based on the concentration of precursor solutions and the length of microwave time.

Photoluminescence Properties of Poly (Ethylene Glycol) Passivated Carbon Dots from Cassava Peels Permono Adi Putro; Liszulfah Roza; Isnaeni Isnaeni
Indonesian Journal of Science and Education (IJOSE) Vol 3, No 2 (2019): Indonesian Journal of Science and Education
Publisher : Fakultas Keguruan dan Ilmu Pendidikan

Carbon dots (C-dots) is a new type of luminescense nanoparticles that can be synthesized easily from natural sources, such as cassava peels. C-dots has been synthesized from cassava peels based green synthesis using low temperature. The surface of C-dots was passivated by poly(ethylene glycol) (PEG) with variations in volume from 0.5 ml, 1 ml, and 1.5 ml. Luminescense properties before and after passivasive with PEG characterized using photoluminescense (PL) and time resolved photoluminescence (TRPL) spectrophotometer. Peak wavelength spectrum of PL shows a red shift when 0.5 ml PEG was added. However, when the addition of PEG increases, peak wavelength spectrum of PL shows a blue shift. PL intensity decreased along with increasing of PEG volume. PL intensity influenced C-dots electron time decay linearly. C-dots electron time decay increased along with decreased of PL intensity. This results assigned potency that C-dots in water solution can be applied as bioimaging and metal ion and salt biosensing. however, it needs extra optical measurements to support our discovery.Keywords: cassava peels, C-dots, electron time decay, FL intensity, PEG

Reducing the Electrical Conductivity of ZnO/Ag Nanofiller for Solid Polymer Electrolytes Prepared by Laser Ablation in Polylactic Acid Solution Permono Adi Putro; Nurfina Yudasari; Yulia Irdawati; Ahmad S. Sulaeman; Akhiruddin Maddu
Jurnal Fisika dan Aplikasinya Vol 17, No 2 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i2.8135

Solid polymer electrolytes (SPEs) are vital components of fast appearing technology for energy storage-conversion devices. Here, SPEs based on silver (Ag) and zinc oxide (ZnO) nanoparticles are prepared by laser ablation in polylactic acid (PLA) at room temperature. The comparison study of PLA, PLA-ZnO, PLA-ZnO/Ag, and PLA-Ag -based SPEs is conducted in pursuance of the electrical conductivity obtained from electrochemical impedance spectroscopy (EIS) characterization. EIS provides comprehensive analyses, including DCand AC conductivities, dielectric constant, and electrical modulus of the samples. Our results show that PLA-ZnO exhibits an appreciable value of DC conductivity, which insignificantly decreases by Ag existence into PLA-ZnO/Ag. This study suggests that PLA-ZnO remains stable by Ag incorporation; hence, PLA-ZnO/Ag has a great potential as SPEs

Precursor concentration effect on optical properties of carbon dots from Cassava’s peels Permono Adi Putro; Liszulfah Roza; Isnaeni Isnaeni
Journal of Physics: Theories and Applications Vol 2, No 2 (2018): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Carbon dots (C-dots) are a new type of fluorescent nanoparticles that can be readily synthesized from natural sources, such as cassava’s peels. In this work, C-dots were synthesized from cassava’s peels using low temperature green synthesis based. The Green synthesis techniques were done by using water as a solvent non-chemical and natural sources. The Synthesis was done using various concentrations of precursor from 0.25%, 0.50%, 1.0% and 2.0%. Optical properties of C-dots were characterized using spectrophotometer UV-Vis, photoluminescence (PL) and time resolved photoluminescence (TRPL). The concentration of precursor lead to differences in molecular density and content of preparation thus affecting optical properties. The performance of C-dots optical properties were dominated by the transition of electrons n–π* on structure aromtic C=O which originate from the surface of C-dots. The result of C-dots sample with a concentration of 2.0% precursors has the best emission effiency. This provides the potential for C-dots cassava’s peels in the aqueous solution to be applied as cellular bioimaging and biosensing metal ions and salts.

THE EFFECT OF POLY (ETHYLENE GLYCOL) ON THE PHOTOLUMINESCENCE PROPERTIES OF CARBON DOTS FROM CASSAVA PEELS SYNTHESIZED BY HYDROTHERMAL METHODS Permono Adi Putro; Liszulfah Roza; Isnaeni Isnaeni
Spektra: Jurnal Fisika dan Aplikasinya Vol 4 No 1 (2019): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 4 Issue 1, April 2019
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Carbon dots (C-dots) have been successfully synthesized from cassava peels using the hydrothermal method. The C-dots are further passivated using poly (ethylene glycol) (PEG) with a variation of the volume of 0.5 ml, 1.0 ml, and 1.5 ml. The properties of photoluminescence C-dots before and after PEG were characterized using photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectrophotometers. PEG succeeded in influencing PL C-dots properties, such as peak wavelength, PL intensity, and electron time decay. The addition of 0.5 ml of PEG to C-dots is the optimum condition and best with the peak wavelength, the PL intensity and, time decay electron is 507.52 nm, 5302 a.u, and 3.794031133 ns, respectively.

Computational Evaluation of Intermolecular Interaction in Poly(Styrene-Maleic Acid)-Water Complexes Using Density Functional Theory Daru Seto Bagus Anugrah; Laura Virdy Darmalim; Permono Adi Putro; Liana Dewi Nuratikah; Nurwarrohman Andre Sasongko; Parsaoran Siahaan; Adi Yulandi
Indonesian Journal of Chemistry Vol 21, No 6 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.67961

The high application of Poly(styrene-maleic acid) (PSMA) in an aqueous environment, such as biomedical purposes, makes the interaction between PSMA and water molecules interesting to be investigated. This study evaluated the conformation, the hydrogen bond network, and the stabilities of all the possible intermolecular interactions between PSMA with water (PSMA−(H2O)n, n = 1–5). All calculations were executed using the density functional theory (DFT) method at B3LYP functional and the 6–311G** basis set. The energy interaction of PSMA–(H2O)5 complex was –56.66 kcal/mol, which is classified as high hydrogen bond interaction. The Highest Occupied Molecular Orbital (HOMO) – Lowest Unoccupied Molecular Orbital (LUMO) energy gap decreased with the rise in the number of H2O molecules, representing a more reactive complex. The strongest hydrogen bonding in PSMA–(H2O)5 wasformed through the interaction on O72···O17–H49 with stabilizing energy of 50.32 kcal/mol, that analyzed by natural bond orbital (NBO) theory. The quantum theory atoms in molecules (QTAIM) analysis showed that the hydrogen bonding (EHB) value on O72···O17–H49 was –14.95 kcal/mol. All computational data revealed that PSMA had moderate to high interaction with water molecules that indicated the water molecules were easily transported and kept in the PSMA matrix.

ABSORBAN ION LOGAM CU (II) BERBASIS HIDROGEL SUPERABSORBAN CMCâ€“Gâ€“PKA/NAALG DENGAN TEKNIK IRADIASI SINAR GAMMA Permono Adi Putro; Ahmad Sofyan Sulaeman; Erizal Erizal; Imas Ratna Ermawati
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 7 (2018): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2018
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Abstrak Hidrogel Superabsorban (HSA) CMC-g-PKA/NaAlg telah disintesis menggunakan iradiasi sinar gamma sebagai crosslinker dengan dosis 10 kGy. HSA disintesis dengan variasi massa CMC, yaitu 1,0 g, 1,5 g, 2,0 g, dan 2,5 g. Kemampuan HSA dalam menyerap ion logam Cu (II) telah dipelajari menggunakan spektrofotometer UV-Vis. Pengujian dilakukan dengan variasi konsentrasi ion logam Cu (II) yaitu, 1%, 2%, 3%, 4%, dan 5% selama 30 menit. Nilai absorbansi pada ion logam Cu (II) meningkat seiring dengan peningkatan massa CMC. Nilai absorbansi terbesar, yaitu 74% pada massa CMC 2,5 g. Pengujian FTIR mencirikan adanya interaksi antara gugus (OH) hidroksil, (NH2) amina, dan karboksilat (COOH), terhadap ion logam CuÂ (II) pada bilangan gelombang 3653,18 1/cm, 1442,75 1/cm, dan 1587,42 1/cm. Kata-kata kunci: HSA, Absorbansi, ion logam Cu (II), UV-Vis, FTIR Abstract Hydrogel Superabsorbent (HSA) CMC-g-PKA/NaAlg has been synthesized using gamma-ray irradiation as a 10 kGy crosslinker. HSA is synthesized with CMC mass variations, i.e. 1.0 g, 1.5 g, 2.0 g, 2.5 g. HSAâ€™s ability to absorb Cu (II) metal ions has been studied using the UV-Vis spectrophotometer. The test was performed with variation of Cu (II) ion concentration i.e. 1%, 2%, 3%, 4%, and 5% for 30 minutes. The absorbance value of Cu (II) metal ions increases with increasing mass of CMC. The largest absorbance value, i.e., 74% in CMC mass 2.5 g. The FTIR test characterizes the interaction of hydroxyl (OH), amine (NH2), and Carboxylic (COOH), groups to Cu-(II) metal ions in wave number 3653,18 1/cm, 1442,75 1/cm, and 1587,42 1/cm. Keywords: HSA, Absorbance, Cu (II) metal ions, UV-Vis, FTIR.

PENERAPAN GAMIFIKASI DALAM PENDIDIKAN FISIKA: SUATU STUDI LITERATUR SISTEMATIS Badryatusyahryah Badryatusyahryah; Murni Winarsih; Cecep Kustandi; Permono Adi Putro
Kwangsan: Jurnal Teknologi Pendidikan Vol 10, No 2 (2022): Kwangsan
Publisher : Balai Besar Guru Penggerak Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31800/jtp.kw.v10n2.p283--301

The application of gamification in education has attracted many researchers to increase engagement and achieve more effective learning. Applying technology in learning during the last few years, can increase student’s motivation towards learning physics. The aim of this study is to present empirical findings from the current literature on the use of gamification in physics education. Therefore, we conducted a systematic literature review of 18 empirical scientific articles published in various Google Scholar databases from 2017 to 2021 using Publish or Perish. This review reveals the latest emerging gamification trends in physics education, and also reveals literature gaps, challenges, barriers, and broadens possible future research directions. We found that gamification can provide more information about the learning process. Gamification can create a competitive environment in an effort to improve student learning outcomes. The learning outcomes that were shown to be most affected were the motivation and involvement of students. The findings of this study provide a framework and insight for future researchers regarding content areas, educational levels, theoretical models, results, methodologies, and assessment instruments. AbstrakPenerapan gamifikasi dalam pendidikan telah menarik banyak peneliti untuk meningkatkan keterlibatan dan mencapai pembelajaran yang lebih efektif. Menerapkan teknologi dalam pembelajaran selama beberapa tahun terakhir ini, dapat meningkatkan motivasi peserta didik terhadap pembelajaran fisika. Tujuan penelitian ini adalah untuk menyajikan temuan empiris dari literatur mutakhir tentang penggunaan gamifikasi dalam pendidikan fisika. Oleh karena itu, kami melakukan systematic literature review terhadap 18 artikel ilmiah empiris yang diterbitkan di berbagai Google Scholar database dari tahun 2017 sampai 2021 menggunakan Publish or Perish. Tinjauan ini mengungkapkan tren gamifikasi terbaru yang muncul dalam pendidikan fisika, dan juga mengungkapkan kesenjangan literatur, tantangan, hambatan, dan memperluas kemungkinan arah penelitian di masa depan. Kami menemukan bahwa gamifikasi dapat memberikan lebih banyak informasi tentang proses pembelajaran. Gamifikasi dapat menciptakan lingkungan yang kompetitif dalam upaya meningkatkan hasil belajar peserta didik. Hasil belajar yang ditunjukkan paling terpengaruh adalah motivasi dan keterlibatan peserta didik. Temuan dari penelitian ini memberikan kerangka kerja dan wawasan bagi peneliti di masa depan mengenai bidang konten, tingkat pendidikan, model teoritis, hasil, metodologi, dan instrumen penilaian.

SIFAT OPTIK CARBON DOTS (C-DOTS) DARI DAUN BAMBU HASIL SINTESIS HIJAU BERBANTUKAN GELOMBANG MIKRO Permono Adi Putro; Akhiruddin Maddu
Wahana Fisika Vol 4, No 1 (2019): June
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v4i1.15569

Carbon dots (C-dots) adalah tipe baru dari nanopartikel berpendar yang dapat mudah disintesis dari sumber alami. Sintesis C-dots dari daun bambu telah berhasil dilakukan menggunakan teknik sintesis hijau berbantukan gelombang mikro. Teknik sintesis hijau dilakukan dengan menggunakan air sebagai pelarut non-kimia dan sumber alami. Sintesis dilakukan menggunakan variasi konsentrasi prekursor untuk dipelajari pengaruhnya terhadap sifat fisik dan sifat optiknya. Sifat fisik C-dots menunjukkan warna transparan di bawah cahaya tampak, dan warna hijau di bawah laser UV 405 nm. Sifat optik C-dots dikarakterisasi menggunakan spektrofotometer UV-Vis, dan spektrofotometer dengan sumber eksitasi 405 nm. Konsentrasi prekursor mempengaruhi intensitas eksitasi dan emisi, namun pergeseran Stokes C-dots memiliki kestabilan yang sangat baik dalam larutan berair. Pergeseran Stokes berasal dari keadaan transisi n–π* dari struktur ikatan aromatik C=O pada permukaan C-dots. Kami peroleh C-dots yang berpotensi untuk diaplikasikan sebagai bioimaging seluler in vivo dan in vitro dan biosensing ion logam dan garam.

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