Rahmat Hidayat
YOU?
Author Swipe
View article: Effect of Mosaccha inoculum on fungal and yeast populations, sensory attributes, antioxidant activity, and ?-glucan content in cowpea tempeh
Effect of Mosaccha inoculum on fungal and yeast populations, sensory attributes, antioxidant activity, and ?-glucan content in cowpea tempeh Open
Rizal S, Kustyawati ME, Astuti S, Ristiani DA, Fatimah, Pratiwi LD, Hidayat R. 2025. Influence of Mosaccha inoculum on fungal and yeast populations, sensory profile, antioxidant level, and ?-glucan content of cowpea tempeh. Biodiversitas 2…
View article: Green synthesizes of Silver Nanoparticles (AgNP) from Henna Leaf Extract (Lawsonia Inermis) and Its Chemical and Physical Properties as Photo-sensitizers in The DSSC
Green synthesizes of Silver Nanoparticles (AgNP) from Henna Leaf Extract (Lawsonia Inermis) and Its Chemical and Physical Properties as Photo-sensitizers in The DSSC Open
To substitute an expensive inorganic dye, we green synthesized silver nanoparticles (AgNP) from Henna leaf extract as photosensitizers in DSSC. Henna dye was macerated for 24 hours using ethanol and filtered. To synthesize AgNPs, 10 ml of …
View article: Fabrication and Characterization of Low-Cost Dye-sensitized Solar Cells (DSSCs) with Natural Light Absorbers of Henna-Based Natural Dye and N719 Mixtures
Fabrication and Characterization of Low-Cost Dye-sensitized Solar Cells (DSSCs) with Natural Light Absorbers of Henna-Based Natural Dye and N719 Mixtures Open
To reduce the production cost of DSSC, we fabricated DSSC with natural dye extracted from Henna ( Lawsonia inermis L.) using the maceration method and a mixture of Henna dye and N719 Ruthenium dye. For Henna dye (with and without evaporati…
View article: PELATIHAN ASESMEN AUTENTIK BAGI GURU SEKOLAH DASAR MUHAMMADIYAH PAKEM SLEMAN
PELATIHAN ASESMEN AUTENTIK BAGI GURU SEKOLAH DASAR MUHAMMADIYAH PAKEM SLEMAN Open
A kind of learning assessments that has not been done by the teachers of Pakem Muhammadiyah Elementary School, Sleman, Special Province of Yogyakarta is authentic assessment. Therefore, training and workshop of authentic assessment were he…
View article: The effect of surface ligands on the surface chemical states and photoluminescence characteristics in cesium lead bromide perovskite nanocrystals
The effect of surface ligands on the surface chemical states and photoluminescence characteristics in cesium lead bromide perovskite nanocrystals Open
This paper presents the results of our study on the relationship between the surface chemical states, which are influenced by ligands, and photoluminescence (PL) characteristics in cesium lead halide perovskite nanocrystals (NCs).
View article: Incorporation of Gold Nanoparticle into ZnO Electron Transport Layer to Improve Performance of Hybrid Bulk Heterojunction Solar Cell
Incorporation of Gold Nanoparticle into ZnO Electron Transport Layer to Improve Performance of Hybrid Bulk Heterojunction Solar Cell Open
We have investigated the effect of localized surface plasmon resonance (LSPR) from gold nanoparticles incorporated into the electron transport layer (ETL) of zinc oxide (ZnO) on charge carrier transport in order to improve the performance …
View article: Fabrication of dye-sensitized solar cells with natural dye pigments derived from mustard green (Brassica juncea L) and turmeric (Curcuma longa L)
Fabrication of dye-sensitized solar cells with natural dye pigments derived from mustard green (Brassica juncea L) and turmeric (Curcuma longa L) Open
Natural dye molecules are good alternatives for the ruthenium-based sensitizer for use in dye-sensitized solar cell (DSSC) application. In this research, we have reported the potential application of natural pigment extracts as a dye-sensi…
View article: ARSHIP : Autonomous Search Ship Untuk Mencari Korban Kecelakaan Hilang di Perairan
ARSHIP : Autonomous Search Ship Untuk Mencari Korban Kecelakaan Hilang di Perairan Open
Unmanned Surface Vehicle (USV) is an unmanned surface vessel that can operate automatically or manually that can be controlled by humans. Unmanned Surface Vehicle (USV) is equipped with an autonomous navigation system. In addition, ARSHIP'…
View article: Analysis of the sustainability level of using immunoglobulin Y (IgY) as antibiotic substitute
Analysis of the sustainability level of using immunoglobulin Y (IgY) as antibiotic substitute Open
Broiler chickens are the highest source to fulfill animal protein consumption of the Indonesian people. The population of this type of chicken is very high because it does not require a large area in maintenance, has fast growth and good f…
View article: Photoluminescence and photovoltaic properties of cesium lead bromide nanocrystals with linoleic acid ligand
Photoluminescence and photovoltaic properties of cesium lead bromide nanocrystals with linoleic acid ligand Open
Cesium lead bromide (CsPbBr 3 ) nanocrystals (NCs) were synthesized using the ligand-assisted reprecipitation (LARP) method, with linoleic acid (LA) and oleylamine (OlAm) as ligands. The crystal structures of the samples depend on the liga…
View article: Crystal structures and photoluminescence characteristics of cesium lead bromide perovskite nanoplatelets depending on the antisolvent and ligand used in their syntheses
Crystal structures and photoluminescence characteristics of cesium lead bromide perovskite nanoplatelets depending on the antisolvent and ligand used in their syntheses Open
Cesium lead bromide (CsPbBr3) nanocrystals (NCs) with nanoplatelet shapes and different crystal structures were synthesized via the ligand-assisted reprecipitation (LARP) method using different pairs of ligands and antisolvents, namely ole…
View article: Ultrasonication-modified electrochemically exfoliated graphene for counter electrode in dye-sensitized solar cells
Ultrasonication-modified electrochemically exfoliated graphene for counter electrode in dye-sensitized solar cells Open
Graphene has various excellent properties, contributing to its wide potential applications. Electrochemically exfoliated graphene (EEG) is a graphene-like material synthesized via electrochemical methods, requiring a shorter synthesis time…
View article: Determination of Effective Atomic Number and Radiation Mass Attenuation Coefficient of the Bolus from Alginate Impression Material
Determination of Effective Atomic Number and Radiation Mass Attenuation Coefficient of the Bolus from Alginate Impression Material Open
Alginate impression material is a material that is commonly used to print dentures. This material is made from alginate. The properties of this material are rubbery, elastic, and not easily deformed so it can be applied as a bolus. This st…
View article: Development of Trivalent Samarium Ion-Doped Barium Fluoroborotellurite Glasses for Solid-State Lighting and Scintillation Material
Development of Trivalent Samarium Ion-Doped Barium Fluoroborotellurite Glasses for Solid-State Lighting and Scintillation Material Open
In this research we developed Sm 3+ ion-doped fluoroborotellurite with formula 30B 2 O 3 -(30-x)TeO 2 -10ZnF 2 -30BaO-xSm 2 O 3 where x = 0.0; 0.05; 0.1; 0.5; 1.0; and 1.5 mol%. They developed using the melt-quenching technique. The raw ma…
View article: Low carrier recombination in polysiloxane gel electrolyte for high-performance DSSC
Low carrier recombination in polysiloxane gel electrolyte for high-performance DSSC Open
Previous research on quasi-solid-state DSSC (QSS-DSSC) that utilized polysiloxane-based polymer gel electrolytes (PGE) showed that the functional performance of the cells was highly affected by electrolyte infiltration into the TiO 2 nano-…
View article: Modification of plasmonic properties in several transition metal-doped graphene studied by the first principles method
Modification of plasmonic properties in several transition metal-doped graphene studied by the first principles method Open
Doping graphene with a single transition metal atom results in bandgap opening and partial filling of the mid-gap states, leading to the possibility of plasmon excitation with plasmon frequency depending on the TM dopant.
View article: Population Dynamics Modeling with Differential Equation Method
Population Dynamics Modeling with Differential Equation Method Open
Population dynamics modeling is one of the important approaches in understanding population development and its influence on various aspects of life, such as economic, social, and environmental. This article discusses the application of di…
View article: Diagnosis and Clinical Symptoms of COVID-19 (Coronavirus Disease 2019)
Diagnosis and Clinical Symptoms of COVID-19 (Coronavirus Disease 2019) Open
The clinical manifestations of COVID-19 vary widely, ranging from asymptomatic to very severe respiratory distress. Both the body's immune response, both the natural body's immune response and the adaptive body's immune response, play a ve…
View article: Comparison of Immune Response and Immunobiology in COVID-19 (Coronavirus Disease 2019) Mild-Moderate Degree and Severe Degree
Comparison of Immune Response and Immunobiology in COVID-19 (Coronavirus Disease 2019) Mild-Moderate Degree and Severe Degree Open
The difference in immunological profiles between mild-moderate and severe cases of COVID-19 can be seen in lower lymphocyte counts, leukocytes, and higher neutrophil-lymphocyte ratios. And lower percentages of monocytes, eosinophils, and b…
View article: The New Emerging Disease COVID-19 (Coronavirus Disease 2019)
The New Emerging Disease COVID-19 (Coronavirus Disease 2019) Open
COVID-19 (Coronavirus disease 2019) is a new type of disease caused by a virus from the coronavirus group, namely the Severe Acute Respiratory Syndrome Coronavirus 2 or SARS-CoV-2. COVID-19 can cause respiratory system disorders, ranging f…
View article: Photoluminescence Properties of CsPbCl<sub>3</sub> and CsPbBr<sub>3</sub> Nanocrystals synthesized by LARP Method with Various Ligands and Anti-solvents
Photoluminescence Properties of CsPbCl<sub>3</sub> and CsPbBr<sub>3</sub> Nanocrystals synthesized by LARP Method with Various Ligands and Anti-solvents Open
Cesium lead halide (CsPbX 3 ; X= Cl, Br, I) is inorganic materials that can be used for the absorber of Perovskite solar cell and active layer of sensor. In this research, synthesis of cesium lead chloride (CsPbCl 3 ) utilizes cesium chlor…
View article: The Effect of Molecular Orientation in Disperse Red-1 Film on Its Refractive Index
The Effect of Molecular Orientation in Disperse Red-1 Film on Its Refractive Index Open
The refractive index of materials is an important physical quantity in the design of various photonic devices. For thin-film based devices, the fabrication method should be compatible with existing processes in microelectronic fabrication …
View article: Calculation of spectra and plasmon wave distribution in one-dimensional periodic structure
Calculation of spectra and plasmon wave distribution in one-dimensional periodic structure Open
Surface Plasmon Resonance (SPR) is a resonance phenomenon between electromagnetic waves and electrons, which is formed on the interface between metal and dielectric surface. SPR waves can be generated by using a coupler element, such as pr…
View article: Importance of Public Relation for Sustainability: Application of Peace Journalism in the Corporate Sector
Importance of Public Relation for Sustainability: Application of Peace Journalism in the Corporate Sector Open
This article consists of research that examines the importance of public relations’ role in a company in achieving sustainability. This research was conducted with qualitative method towards cases of several forest plantation companies in …
View article: Green synthesis of silver nanoparticles from anthocyanin extracts of purple cabbage (brassica oleracea var capitata) and its characteristics for dye-sensitized solar cells (DSSC) application
Green synthesis of silver nanoparticles from anthocyanin extracts of purple cabbage (brassica oleracea var capitata) and its characteristics for dye-sensitized solar cells (DSSC) application Open
We extracted natural dye from purple cabbage (PCE) and green-synthesized the silver nanoparticle (AgNPs) from this extract for the light-harvesting material in DSSC. The anthocyanin was extracted with the maceration method for 24 hours wit…
View article: SPREADING THE 'FEELINGS OF THE PRESIDENTIAL ELECTION' THROUGH TIKTOK AHEAD OF THE NAHDLATUL ULAMA CONGRESS
SPREADING THE 'FEELINGS OF THE PRESIDENTIAL ELECTION' THROUGH TIKTOK AHEAD OF THE NAHDLATUL ULAMA CONGRESS Open
The research was conducted by observing two candidates for general chairmanship of the Nahdlatul Ulama Executive Board (PBNU), each KH Said Aqil Siroj (Kiai Said) and Yahya Cholil Staquf or Gus Yahya in implementing political marketing str…
View article: Synthesis of composite nanostructure natural ZrO<sub>2</sub> and magnetite particles (Fe<sub>3</sub>O<sub>4</sub>@ZrO<sub>2</sub>) and study of its lead ion adsorption efficiency
Synthesis of composite nanostructure natural ZrO<sub>2</sub> and magnetite particles (Fe<sub>3</sub>O<sub>4</sub>@ZrO<sub>2</sub>) and study of its lead ion adsorption efficiency Open
The potential of zircon minerals in Indonesia, especially in Central Kalimantan, has not been adequately explored and developed into valuable materials with high technical and economic value and environmentally friendly. This research has …
View article: Improved dye-sensitized solar cell performance with hedgehog-like shaped ZnO nanorods grown using ZnO nanoparticles seed layer
Improved dye-sensitized solar cell performance with hedgehog-like shaped ZnO nanorods grown using ZnO nanoparticles seed layer Open
We have investigated the preparation of ZnO nanorods (ZnO-NRs) with a hedgehog-like structure by hydrothermal method and the working performance of dye-sensitized solar cell (DSSC) based on this ZnO-NRs electrode. ZnO-NRs were grown from Z…