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All Journal VALENSI POSITRON Jurnal Elementer (Elektro dan Mesin Terapan) Indonesian Journal of Chemistry Jurnal Fisika : Fisika Sains dan Aplikasinya JTM - Jurnal Teknik Mesin Magnetic: Research Journal of Physics and It’s Application Jurnal Nasional Pengabdian Masyarakat Archive: Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Kepada Masyarakat (JPKM) Zadama: Jurnal Pengabdian Masyarakat J-Icon : Jurnal Komputer dan Informatika Jurnal Pendidikan dan Pengabdian Masyarakat Molekul: Jurnal Ilmiah Kimia Wahana Fisika : Jurnal Fisika dan Terapannya
Johannes, Albert Zicko
Universitas Nusa Cendana
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Other

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CHARATERIZATION ON OPTICAL PROPERTIES OF CARBON NANODOTS FROM SCREW PINE LEAVES FOR COPPER ION DETECTION Ngara, Zakarias Seba; Lende, Damaris Natalia; Johannes, Albert Zicko; Bukit, Minsyharil
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 10 No 2 (2025): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v10i2.25384

Abstract

Here, we fabricate, characterize and synthesize the highly fluorescent carbon nanodots (C-dots) from screw pine leaves (SPL). The objectives of this research are to fabricate C-dots from SPL using the carbonization method which is followed by sonication, centrifugation and filtering processes, to charactrize the optical properties of the as-prepared C-dots, and to applied these C-dots as sensor for detection of copper (Cu2+) ions. The optical properties of the C-dots can be characterized from their absorption (Abs), photoluminescence (PL), and Fourier Transform infrared (FTIR) spectra. Whereas the application of the as-produced C-dots as sensor for Cu2+ ions detection can be investigated by the quenching of PL intensity of C-dots after coordination with Cu2+ ions. The analysis of Abs, PL, and FTIR spectra demonstrated the formation of C-dots from SPL in ethanol solutiion. These C-dots have an absorption peak at 276 nm corresponding to the π→π* transition and PL peak at 401 nm corresponding to their blue fluorescence. Fortunately, the interaction between the as-prepared C–dots and Cu2+ ions displayed the PL quenching of the C-dots with the LOD value as low as 2.85 μM. Based on these results, these C-dots exhibited the sensing system for Cu2+ ions detection
Fabrication and Synthesis of Fluorescent Carbon Nanodots from Black Sticky Rice as Probes for detection Mg2+ ions Ngara, Zakarias Seba; Mamut, Anastasia; Pingak, Redi Kristian; Johannes, Albert Zicko; Lerrick, Reinner Ishaq; Refli, Refli
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 2, November 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i2.45394

Abstract

Herein, fluorescent carbon nanodots (C-dots) with average diameter of 5.51 nm were fabricated from black sticky rice by using carbonization method. These C-dots have been synthesized with magnesium (Mg2+) ions to investigate their potential application as probes for detection Mg2+ ions. The as-obtained C-dots were measured their absorption (Abs), photoluminescence (PL), and FTIR spectra, X-ray diffraction (XRD) patterns and transmission electron microscopy (TEM) image. According to their Abs spectrum, the Abs peak at 276 nm confirmed the presence of C-dots in ethanol solution. Fortunately, the PL peak at 427 nm corresponded to their blue emission color. The XRD patterns and the TEM image confirmed also the formation of amorphous state and monodispersed spherical C-dots, respectively. When the as-prepared C-dots were synthesized with Mg2+ ions, the PL intensities of C-dots quenched as increasing the concentration of Mg2+ ions. A characteristic PL quenching of the C-dots through Mg2+ chelation demonstrated the sensing system up to the detection limit of 2.98 µM. This is the first reporting the application of C-dots as sensors for detection Mg2+ ions. These findings can pave the large opportunity for application of these C-dots in sensing, bioimaging, drug delivery, and so on.
Kajian Sifat Fisis dan Kimia Bio-Briket Campuran Tempurung Kelapa dan Sekam Padi Siu, Kristina; Pingak, Redi K.; Johannes, Albert Zicko
Magnetic: Research Journal of Physics and It’s Application Vol. 1 No. 1 (2021): Magnetic: Research Journal of Physics and It’s Application
Publisher : Program Studi Fisika - Universitas San Pedro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59632/magnetic.v1i1.70

Abstract

Telah dilakukan penelitian tentang kajian sifat fisis dan kimia biobriket tempurung kelapa dan sekam padi. Penelitian ini bertujuan untuk menentukan pengaruh variasi komposisi sekam padi terhadap sifat fisis dan kimia briket tempurung kelapa juga pengaruh variasi komposisi sekam padi terhadap kualitas briket. Briket bioarang merupakan salah satu jenis bahan bakar yang dibuat dari aneka macam bahan hayati atau biomassa. Biomassa yang digunakan dalam penelitian ini adalah tempurung kelapa dan sekam padi. Persentase tempurung kelapa dan sekam padi yang digunakan adalah 100:0, 85:15, 70:30, 65:35 dan 40:60 dengan ukuran partikel arang yang lolos mesh 60 atau 0,250 mm dan perekat kanji 10%. Hasil penelitian ini menunjukkan bahwa nilai densitas, nilai porositas, nilai kadar air, nilai kadar abu, nilai zat kadar menguap dan kadar karbon terikat secara berturut-turut berkisar antara 0,786 gram/cm3 - 1,263 gram/cm3, 15,22 - 45,39, 4,04 - 4,90, 20,34 - 21,24 , 17,354 - 21,032 dan 59,36 - 61,86. Hasil analisis menunjukkan bahwa penambahan sekam padi pada pembuatan briket tempurung kelapa memberikan pengaruh yang berbeda untuk sifat-sifat fisis dan kimia briket. Dari hasil peneltitian ini secara umum dapat disimpulkan bahwa semua sampel telah memenuhi syarat standar kualitas briket.
Co-Authors Abdul Wahid Abdul Wahid Ali Warsito Andreas Ch. Louk Andreas Christian Louk Andreas Christian Louk Anggi Arni Biha Ari Bangkit Sanjaya Umbu Atika S. Ahab Bartholomeus Pasangka Bernandus Bernandus Bernandus Bernandus, Bernandus Betan, Agustinus D D Bethan, Agustinus Deka Bukit, Minsyahril Bukit, Minsyharil Christine Mbiliyora Dolin Marlince Tameno Ernawati Kawa Fidelis Nitti Freinademetz Anggur Gerda Pandu Hadi I Sutaji Hery L. Sianturi Intan M.P. Dewi Jacob, Johanes Eliaser Jonshon Tarigan Julius Bunga Tedju Kristantia Mida Subah Lapono, Laura A. S. Lau, Claudya Hendrika Putri Laura A. S. Lapono Lende, Damaris Natalia Lerrick, Reinner Ishaq Mamut, Anastasia Maria Lurumutin Umrisu Maria Magdaline Bupu Marselinus E. Dandara Martelda Natbais Minsyahril Bukit Minsyahril Bukit Minsyahril Bukit Minsyahril Bukit Ndii, Meksianis Z Pasangka, Bartholomeus Pascoleta Inacio Pingak, Redi Kristian Refli, Refli Renaldo Apriandi Kasa Resiona, Baltazar A T San Arnolus Kain Setiawan, Ely Sevarianus Ramli Severianus Wunda Sianturi, Hery Leo Siu, Kristina Solly Joyce M. Kase Sutaji, Hadi Imam Tanesib, Jehunias Leonidas Tarigan, Jhonson Tarigan, Jonshon Valerianus Jehadu Veronika Hoar Seran Yongki Pawe Due Yuditha Ignasia Bete Zakarias Seba Ngara