bluuebunny/crossref_metadata_2025_split huggingface dataset:
Detection of Ammonium Ion by An Electrochemical Sensor Based on Cu-BTC
Authors: Ikhtiarudin Azhar , Haekal Mochamad Ismet , Nuruzzahran Muhammad Arkan , Robbani Muhammad Rosyad , Budiantono Reva , Syaifullah Dzaki Ahmad , Akmal Raden Muhammad , Capriano Rayhan Bilal , Ihsan Farhan Afdhalul , Prayoga Adyatma , Shukri Ganes , Saputro Adhitya Gandaryus 
Published: February 2024

Abstract
There is a growing interest in utilizing metal-organic frameworks (MOFs) for the development of electrochemical sensors with superior performance. In this work, a study on the detection of ammonium ion (NH4
+) on metal-organic frameworks (MOFs) Cu-BTC surface has been conducted by using both experimental and computational methods. By using DFT calculation, the adsorption energy of ammonium ion (NH4
+) on the MOF surfaces was determined. The calculation result showed that NH4
+ molecules can be adsorbed on the surface of Cu-BTC with an adsorption energy value of -1.51 eV. Additionally, we performed the synthesis of Cu-BTC and, using CV (Cyclic Voltammetry), we obtained a working area of around -0.113 V. Furthermore, chronoamperometry tests revealed that the addition of ammonium at concentrations of 0.05, 0.1, and 0.15 mM resulted in changes in the current. The sensor also showed good stability and an increase in peak current at each tested concentration. This confirms that the MOFs tested can be utilized as ammonium ion sensors.
A Theoretical Investigation on Nitrogen Dioxide Adsorption on Self-Assembled Monolayer-Functionalized ZnO Monolayer
Authors: Raihan Muhammad Fadlan , Manurung Robeth Viktoria , Nuruddin Ahmad , Wungu Triati Dewi Kencana 
Published: February 2024

Abstract
This study employs Density Functional Theory (DFT) calculations to elucidate the adsorption mechanism in the context of a ZnO monolayer system integrated with a Self-Assembled Monolayer (SAM) for NO2 detection. Through rigorous computational analysis, we delve into the intricate interplay of geometric transformations, the dissociation of NO2 bonds, and shifts in electronic properties ensuing from the introduction of the SAM. The observed modifications underscore the pronounced influence exerted by the SAM on the system’s behaviour. This investigation not only sheds light on the underlying mechanisms but also paves the way for potential experimental applications involving the functionalization of ZnO with SAM for enhanced gas sensing performance. The findings hold significant promise for the advancement of gas sensor technologies with improved sensitivity and selectivity.
Preparation and properties of bimetallic Co/Cu ZIF-67 for electrochemical application
Authors: Wulandari C , Gumilar G , Nugraha  , Wasisto H S , Iqbal M , Irzaman  , Nugroho W S , Rusydi F 
Published: February 2024

Abstract
Efforts to enhance the electrochemical properties of materials have become the focus of numerous studies because these properties are essential in various fields of application. Zeolitic imidazole framework-67 (ZIF-67) is a type of metal-organic framework (MOFs) expected to demonstrate excellent performance in electrochemical applications due to its numerous distinct properties. Consequently, various strategies and techniques have been developed to improve the electrochemical performance of ZIF-67. In this study, we employed bimetallic ZIF-67 constructed with cobalt (Co) and copper (Cu) metal ions within the imidazole frameworks. The use of bimetal is expected to increase conductivity and fine-tune the physicochemical properties of ZIF-67. Using coprecipitation methods, we synthesized both single-metal and bimetallic ZIF-67 and compared their characterizations. The addition of Cu metal ions does not alter the materials phase, ensuring compatibility with the single-metal ZIF-67 structure. However, the rhombic dodecahedron morphology of ZIF-67 shifts from a smooth to a concave and rough surface in Co/Cu ZIF-67. Furthermore, Co/Cu ZIF-67 exhibits higher peak current on their cyclic voltammetry (CV) curve by 46.15 µA. The results effectively illustrate the advantages of bimetal on ZIF-67 properties and performance. Finally, this study succesfully briefly demonstrate the potential development of Co/Cu-based ZIF-67 for various electrochemical applications.
GO/ZnO Biosensor Synthesis and Characterization for Biosensors
Authors: Atikah Fitri , Yuliarto Brian , Manurung Robeth Viktoria 
Published: February 2024

Abstract
In this study, GO/ZnO nanoparticles were synthesized using the solvothermal method and characterized for potential biosensor applications. The synthesized nanoparticles exhibited a high degree of crystalline structural purity, as confirmed by XRD analysis. The XRD pattern revealed characteristic peaks corresponding to the crystal planes of ZnO, indicating a typical wurtzite hexagonal structure. In addition, the synthesized nanoparticles were evaluated for their physical characteristics using transmission electron microscopy. The TEM analysis showed that the ZnO nanoparticles had a narrow size distribution, with an average particle size of approximately 25.19 ± 4.1 nm. The morphology of the nanoparticles was further examined, revealing that the ZnO nanoparticles were uniformly dispersed and localized within the GO sheets. Furthermore, the exfoliation of GO into single or few-layered sheets was achieved, as evidenced by its transparency in the TEM images. These findings suggest that the solvothermal synthesis method is effective in producing highly dispersed GO/ZnO nanoparticles with a narrow size distribution. The synthesized GO/ZnO nanoparticles showed promise for biosensor applications due to their uniform shape and distribution, as well as their small size.
Synthesis of Nickel Phosphate Using Self Templated Method
Authors: Azaman M A I , Raihan M F , Zaid H F M 
Published: February 2024

Abstract
Nickel phosphate has diverse applications, such as in glucose sensors, catalysts, and supercapacitors. Different synthesis methods affect its structure and properties, characterized by Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) analysis. Metal phosphates have high ion conductivity, chemical stability, and unique 1D nanostructures. Self-templating techniques, like templating against colloidal particles, create hollow 1D metal phosphate structures, determined by the template size. Materials including triethyl phosphate and ethanol, were used in a self templated method to synthesize different forms of nickel phosphate with varying triethyl phosphate volumes, resulting in products labelled as nickel phosphate-500, nickel phosphate-800, and nickel phosphate-1000. The observation under SEM showed that microflower structures are formed while the XRD analysis revealed that the nickel phosphate material had an amorphous structure with randomly arranged particles, evident from the single broad peak in the XRD patterns. The current response showed that nickel phosphate-500 exhibited the highest reading with the value of 0.2 mA compared to the other two nickel phosphates.
Green Synthesis of Silver/Silver Chloride Nanoparticles using Shallot Peel Extract as Reducing Agent
Authors: Fadli Revi Muharam , Nuruddin Ahmad , Yuliarto Brian 
Published: February 2024

Abstract
Precious metal nanoparticles, especially silver, can be an alternative antibacterial agent that is more promising than antibiotics, which tends to induce resistance over time. Unfortunately, most Silver nanoparticle (AgNP) manufacturing methods involve hazardous substances, extreme conditions, high energy, and complicated separations. Reduction of AgNO3 solution with plant extracts can serve as a ‘green’ synthesis pathway, especially if using food processing waste or other biological materials. Reducing substances that are commonly found in plant extracts, such as flavonoids, are widely contained in shallots (Allium cepa L. var. aggregatum) which are commonly used as food ingredients in Indonesia, but the processing waste is still not widely used. This paper describes the synthesis of silver nanoparticles (AgNP) with the AgNO3 solution reduction method, using onion peel waste extract as a reducing agent. Experiments were carried out with variations in the ratio of AgNO3 solution to onion peel extract. The resulting AgNPs were characterized by TEM and UV-vis.
CV Performance of ZnO-Carbon Nanocomposite Based On ZIF-8 as Lithium-Ion Battery Anode
Authors: Febrian Rizki , Septiani Ni Luh Wulan , Iqbal Muhammad , Sobih  , Nursam Natalita Maulani , Muliani Lia 
Published: February 2024

Abstract
Compositing between metal oxide and carbon is strategy to improve the performance of lithium-ion battery anode. This is due to the high theoretical capacity of metal oxides, carbon acts as a lithium ion accelerator and supports the structural stability of metal oxides. The advantages of the ZnO-Carbon nanocomposite anode based on ZIF-8 are its large surface area and porosity. The method used is non-solvothermal through precipitation at room temperature. After obtaining ZIF-8 powder, then it was carbonized at temperatures 600°C. The characterization used were SEM, EDS and TEM. The samples also have a porous character with a nano-sized pore radius. Cyclic Voltammetry (CV) was carried out using 3-electrode system. The CV test showed 3 reduction peaks. The first peak indicated the conversion reaction, the second peak indicated the alloying reaction, and the third peak indicated a solid electrolyte interface (SEI) reaction. The highest diffusion coefficient is alloying reaction with 3.65 x 10−8 cm2/s.
Integrating Microfluidic and Biosensors: A Mini Review
Authors: Tanjaya Hengky , Harito Christian 
Published: February 2024

Abstract
In recent years, the field of analytical research has witnessed a significant transformation driven by the emergence of integrated microfluidic sensors. This ground-breaking technology has been extensively studied, resulting in the resolution of diverse challenges and a revolutionary impact on experiments, particularly in the biomedical domain. By combining the biosensors with microfluidics, there is a tremendous potential to enhance measurement accuracy and expand the capacity of specimens utilized in biomedical applications and experiments. The integration of biosensors with microfluidics enables effective sample separation, precise control over chemical reactions, and the measurement of various critical parameters. Furthermore, the primary objective of this research is to identify gaps in the existing literature concerning integrated microfluidic sensors. This pursuit involves employing comprehensive bibliometric analysis and conducting a systematic literature review of Scopus-indexed publications that are relevant to the field of integrated microfluidic sensors. PRISMA method was being used to filter the documents that are gathered from Scopus database. The outcomes of this study underscore the pressing need for further research in leveraging electrochemical sensors for specimen analysis by integrating them with the advanced technique of microfluidics. The paper emphasizes the significance of continuous research and development efforts in the realm of integrated microfluidic sensors to fully exploit the potential of electrochemical sensors and enhance the overall research process.
A simulation methodology for establishing IR-drop-induced clock jitter for high precision timing ASICs
Authors: Bergamin Gianmario , Soulier Alexandre Pierre 
Published: February 2024

Abstract
The combination of 3D tracking and high-precision timing measurements has been identified by the European Committee for Future Accelerators as a fundamental requirement to increase detection capabilities for future applications. Among others, on-chip high-quality clock is a key factor determining the overall resolution of timing ASICs. However, in large and dense chips, power-grid drops can severely affect the non-deterministic jitter of the clock, representing a limit to the performances. This contribution presents a simulation framework based on commercial tools to derive power supply-induced jitter, providing a pre-silicon methodology to assess its impact to timing indeterminism. The flow is presented together with practical examples and results.
Distributional impacts of fleet-wide change in light duty transportation: mortality risks of PM2.5 emissions from electric vehicles and Tier 3 conventional vehicles
Authors: Singh Madalsa , Tessum Christopher W , Marshall Julian D , Azevedo Inês M L 
Published: February 2024

Abstract
Light-duty transportation continues to be a significant source of air pollutants that cause premature mortality and greenhouse gases (GHGs) that lead to climate change. We assess PM2.5 emissions and its health consequences under a large-scale shift to electric vehicles (EVs) or Tier-3 internal combustion vehicles (ICVs) across the United States, focusing on implications by states and for the fifty most populous metropolitan statistical areas (MSA). We find that both Tier-3 ICVs and EVs reduce premature mortality by 80%–93% compared to the current light-duty vehicle fleet. The health and climate mitigation benefits of electrification are larger in the West and Northeast. As the grid decarbonizes further, EVs will yield even higher benefits from reduced air pollution and GHG emissions than gasoline vehicles. EVs lead to lower health damages in almost all the 50 most populous MSA than Tier-3 ICVs. Distributional analysis suggests that relying on the current gasoline fleet or moving to Tier-3 ICVs would impact people of color more than White Americans across all states, levels of urbanization, and household income, suggesting that vehicle electrification is more suited to reduce health disparities. We also simulate EVs under a future cleaner electric grid by assuming that the 50 power plants across the nation that have the highest amount of annual SO2 emissions are retired or retrofitted with carbon capture and storage, finding that in that case, vehicle electrification becomes the best strategy for reducing health damages from air pollution across all states.
On particular integrability in classical mechanics
Authors: Escobar-Ruiz A M , Azuaje R 
Published: February 2024

Abstract
In this study the notion of particular integrability in Classical Mechanics, introduced in Turbiner (2013 J. Phys. A: Math. Theor.
46 025203), is revisited within the formalism of symplectic geometry. A particular integral

I

is a function not necessarily conserved in the whole phase space

T
∗

Q

but when restricted to a certain invariant subspace

W

⊆

T
∗

Q

it becomes a Liouville first integral. For natural Hamiltonian systems, it is demonstrated that such a function

I

allows us to construct a lower dimensional Hamiltonian in

W

. This symmetry reduction is intimately related with a phenomenon beyond separation of variables and it is based on an adaptive application of the classical results due to Lie and Liouville on integrability. Three physically relevant systems are used to illustrate the underlying key aspects of the symplectic theory approach to particular integrability: (I) the integrable central-force problem, (II) the chaotic two-body Coulomb system in a constant magnetic field as well as (III) the N-body system.
Trees and Soil Management Impacts on Soil Nutrient and Coffee Production in Coffee-Based Agroforestry
Authors: Nurcholis Omar , Auliya Nugroho Gabryna , Muhammad Yusuf Adi Pujo Nugroho R , Prayogo Cahyo , Kurniawan Syahrul 
Published: February 2024

Abstract
Trees and soil management practices (i.e., pruning and fertilization) are essential in maintaining the soil fertility and coffee yield sustainability in coffee agroforestry systems. This study aimed to evaluate the impact of trees and soil management practices on the soil nutrient status within coffee-based agroforestry systems. The research was conducted in coffee agroforestry systems within Universitas Brawijaya Forest (UB Forest) from January to July 2023. The experiment was performed using a factorial randomized block design with three factors, including: 1) pruning of coffee (T1: pruned coffee, T2: unpruned coffee), 2) Fertilizer type (O: organic fertilizer, A: inorganic fertilizer, M:50% organic + 50% inorganic), and 3) Fertilizer dosage (D1: Farmer‘s dose, D2: recommended doses from the Indonesian Coffee and Cacao Research Institute (ICCRI), D3: Dosage from nutrient replacement), totaling 18 treatments with four replications of each. The soil sample was collected at topsoil (20 cm soil depth) around 50 cm from the coffee stem at the beginning of the research and six months after fertilization. The study revealed that tree management affected (p>0.05) soil nutrient status (i.e., soil total N and available P), where pruned coffee management increased soil nutrient status by 2.02 to 4.53 times compared to the unpruned coffee plot. Types and doses of fertilizer significantly affected soil pH (P < 0.05), where the application of organic fertilizer with the recommended dose (OD2) had the highest soil pH. The correlation analysis showed that soil nutrients correlated to coffee yield. The principal component analysis shows that pruned coffee combined with mixed fertilizer at the farmer‘s dose (T1MD1) is closely related to coffee production.
Productivity of Clonal Teak Plantation Under Different Spacing and Thinning Intensity in Java Monsoon Forest
Authors: Bela Rahmawati Rika , Hardiwinoto Suryo , Widiyatno  , Budiadi  , Wibowo Aris 
Published: February 2024

Abstract
Intensive silviculture plays a crucial role in selecting superior clones with high productivity. The use of superior clones needs to be accompanied by appropriate environmental conditions. The arrangement of growing space is one way for teak clones to grow optimally and produce quality wood products. It can choose initial spacing in the early growth phase and thinning intensity in the later growth phase. This study aims to assess and determine the growth of superior teak clones with different thinning intensities at different planting distances to optimize the growing space. Optimizing growth space also has the potential for intercropping under the stand to produce more diverse products. The research design was a Split-plot design with three blocks as replications. The main plots had four spacings, including 3 m x 3 m, 6 m x 2 m, 8 m x 2 m, and 10 m x 2 m. Subplots were thinning intensity, including 0% thinning (control), 25% thinning (moderate thinning), and 50% thinning (heavy thinning). The results showed that spacing could significantly affect diameter growth. Silvicultural thinning showed significant differences in diameter growth, CADI, height, and volume per hectare. The diameter growth showed higher growth at larger spacing and higher thinning intensity, while the volume per hectare was low. The tree height parameter increased with the thinning intensity. The CADI after two years of thinning increased by 14–42% at 25% thinning intensity and increased by about 35–48% at 50% thinning intensity compared to no thinning at each spacing. Meanwhile, the volume per hectare was lower at wider spacing and decreased at a high thinning intensity. These results indicate an increase in spacing, and thinning accelerates diameter growth and provides better-growing space for intercrops.
Enhancing the Quality of Monoterpenes in (Cymbopogon nardus (L.) Rendle) Through Rhizobacteria Application Toward Sustained Soil Health
Authors: Sudiarso  , Larasati Ferota , Roviq Mochammad , Kurniawan Andi , Salsabila Salvia , Barunawati Nunun 
Published: February 2024

Abstract

Cymbopogon nardus is an aromatic plant which produces essential oil. Citronellal, citronellol, and geraniol as well-known as monoterpenes. The component of monoterpenes in this research were triggered by organic matter, such as organic manure and rhizobacteria. Organic fertilizers are used for environmentally friendly by maintaining soil and plant health and it’s necessary to achieve agricultural sustainability. Rhizobacteria are beneficial microorganisms for plants and soil for environmental management of both soil, plants, and soil micro biodiversity. Rhizobacteria contributes to soil fertilization through bio-fixation and bio-solubilization of essential nutrients along with the production of growth regulators. Microorganisms regulate the mechanism of absorption and mobility of nutrients in soil. The objective of this research is to investigate the effects of rhizobacteria and organic manure on the component of monoterpenes as well as the content of citronellal, citronellol, and geraniol. The results research show that C. nardus treated with rhizobacteria accumulating of nitrogen 1% and geraniol 5% in leaves which is more than those without rhizobacteria. Interestingly, content of citronellal and citronellol in leaves increased reach at 10% treated by without rhizobacteria and it higher than those supplied with rhizobacteria. In that case, citronellal, citronellol, geraniol formed from the carbon which was seems supplied by organic manure. Furthermore, rhizobacteria treatment shows a stable content of oil components in various rates of organic manure, but able to increase the oil yield at about 30% of C. nardus. Meanwhile, without supply of rhizobacteria, the result of oil yield relatively similar in various rates of organic manure. Regarding to the results, found that application of rhizobacteria able to increase the fresh weight, dry weight, and oil content. As consequently, contribution of rhizobacteria and organic manure to the mechanism of mineralization and improve soil health indirectly. Hence, plant able to uptake and accumulation nutrients in particular nitrogen, phosphorous and potassium.
Dynamics of Species Richness in Understory Deciduous Teak Forest (Tectona grandis)
Authors: Setiawan Adi , Putra Ramadhana Varotama , Nurul Kholifah Izzah , Iqbal Maulana Ahmad , Aji Pamungkas Bayu , Arifin Syamsul , Udayana Cicik , Aini Nurul , Thamrin Sebayang Husni , Khumairoh Uma , Puji Wicakcono Karuniawan 
Published: February 2024

Abstract
Teak plantation forest is a deciduous forest that sheds its leaves during the dry season. It is generally a secondary forest that is managed in a monoculture manner so that it is homogeneous. However, when teak sheds its leaves, it that may impacts the dynamics of understory species changes due to differences in environmental factors growing in the dry and wet seasons. The study observed 90 plots carried out over a year, namely two times during the dry season and 2 times during the wet season. We placed three transects around the forest edge, each (9 transects), and plotted 1 m × 1 m plots. Data collection was carried out at distances of 5, 10, 15, 20, 25, 30, 35, 40, 45 and 50 m on each transect. In each plot, the composition of the understory vegetation cover, litter cover and soil bare was observed. The research was also observed canopy openness and collected rainfall data for one year from the nearest Meteorology station. Species found were recorded for identification based on origin, life form, original habitat, and seed dispersal. The study‘s results found 57 species, 16 species only in DS, then 17 species only in WS, and 24 in both seasons. The dynamics of changes in these species are influenced by the season, which will affect the environment around the plant. Seasonal differences impact light intensity, canopy openness, leaf fall and growth, and litter thickness, which impact the understory diversity and abundance.