Find research datasets worth reusing

opencc-by-4.0Oct 2019View details →

Data From 'Gallium Phosphide as a Piezoelectric Platform for Quantum Optomechanics'

Source data for figures.

opencc-by-4.0Dec 2023View details →

Deep-potential enabled multiscale simulation of gallium nitride devices on boron arsenide cooling substrates

The data of paper "Deep-potential enabled multiscale simulation of gallium nitride devices on boron arsenide cooling substrates" 1. The BAs file include lammps input file of EMD, BAs model file and NNP model. One can use follw command to perform simulation.                                                             lmp -in in.thermal    Besides, the  ShengBTE results from 3-phonon and 4-phono are included in ShengBTE file. 2. The GaN file include lammps input file of EMD, GaN model file and NNP model. One can use follw command to perform simulation.                                                             lmp -in in.thermal    Besides, the  ShengBTE results from 4-phonon are included in ShengBTE file. 3. The BAs-GaN file include lammps input file of NEMD, heterostructure model file and NNP model. One can use follw command to perform simulation.                                                             lmp -in in.thermal 4. The active learning framework that includes the initial file, running file, machine configuration file and other input files.It is worht to note that the  machine      configuration file may not normally work, duo to different cluster environment.  5. The FEM file contains python scripts for building finite element models.

opencc-by-4.0Mar 2024View details →

Selective recovery of boron, cobalt, gallium and germanium from seawater solar saltworks brines using N-methylglucamine sorbents: Column operation performance

The European Union (EU) identified a list of Critical Raw Materials (CRMs) crucial for its economy, aiming to find alternative sources. Seawater is a promising option as it contains almost all elements, although most at low concentrations. However, to the present, the CRMs' recovery from seawater is technically and economically unfeasible. Other alternatives to implement sea mining might be preferred, such as reverse osmosis brines or saltworks bitterns (after sodium chloride crystallisation). The CRMs' extraction in a selective way can be achieved using highly selective recovery processes, such as chelating sorbents. This study focuses on extracting Trace Elements (TEs) from solar saltworks brines, including boron, cobalt, gallium and germanium, using commercial N-methylglucamine sorbents (S108, CRB03, CRB05). The application of these sorbents has shown potential for boron recovery, but their selectivity for cobalt, gallium, and germanium requires further investigation. This research aims to assess these sorbents' kinetics and column mode performance for TEs recovery from synthetic bitterns. Boron and germanium were rapidly sorbed, reaching equilibrium (>90 %) within 1 h, except for S108, which took 2 h. In column mode, 20–25 pore volumes of bittern were treated to remove boron and germanium, but competition from other elements reduced treatment capacity. An acidic elution (1 M hydrochloric acid) allowed to elute them (>90 %), reaching concentration factors for germanium and boron of 35 and 11, respectively, while cobalt and gallium had less affinity for the sorbents. In addition, the experiments performed were fitted by a mass transfer model to determine the equilibrium constants and selectivities. Therefore, bittern mining has been proven as a secondary/alternative source to obtain CRMs, which can lead the EU to a position in which its dependence on other countries to obtain these raw materials would be decreased.

opencc-by-4.0Apr 2024View details →

Reactivity Switch of Platinum with Gallium: From Reverse Water Gas Shift to Methanol Synthesis

The development of efficient catalysts for the hydrogenation of CO2 to methanol using “green” H2 is foreseen to be a key step to close the carbon cycle. In this study, we show that small and narrowly distributed alloyed PtGa nanoparticles supported on silica, prepared via a surface organometallic chemistry (SOMC) approach, display notable activity for the hydrogenation of CO2 to methanol, reaching 7.2 mol h-1 molPt-1 methanol formation rate with a 54% intrinsic CH3OH selectivity. This reactivity sharply contrasts with what is expected for Pt, which favors the reverse water gas shift reaction, albeit with a poor activity (2.6 mol h-1 molPt-1). In situ XAS studies indicate that ca. 50% of Ga is reduced to Ga0 yielding alloyed PtGa nanoparticles, while the remaining 50% persist as isolated GaIII sites. The PtGa catalyst slightly dealloys under CO2 hydrogenation conditions and displays redox dynamics with PtGa-GaOx interfaces, responsible for promoting both CO2 hydrogenation activity and methanol selectivity. Further tailoring the catalyst interface by using a carbon support in place of silica enables to improve the methanol formation rate by a factor of ~5.

opencc-by-4.0Jun 2019View details →

Data for the publication "A polarization-induced 2D hole gas in undoped gallium nitride quantum wells"

This upload contains the data presented in the manuscript "A polarization-induced 2D hole gas in undoped gallium nitride quantum wells", which reports the observation of a  high conductivity 2DHG in an epitaxially grown GaN/AlN heterostructure. This upload contains 4 files : <ul> <li>1_tabulated_raw_data.xlsx : Both the raw experimental data along with the simulation results used in the Figures 1A, 2B, 3, 4, S2 in the paper. The data is encapsulated in a Excel file, with separate sheets used for each figure.</li> <li>2_nextnano_GaN_AlN_band_diagram.in :  Input file for nextnano software (<a href="https://www.nextnano.de/">https://www.nextnano.de/</a>) for generating the band diagrams in the paper.</li> <li>3_README_XRD_sim.txt : Readme file with instructions for the XRD simulation for Fig 2</li> <li>4_XRD_sim_run.py : Python script for running the XRD simulation</li> </ul>

dryad36/100

Data from: Interfacial tension hysteresis of eutectic gallium-indium

When in a pristine state, gallium and its alloys have the largest interfacial tensions of any liquid at room temperature. Nonetheless, applying as little as 0.8 V of electric potential across eutectic gallium indium (EGaIn) placed within aqueous NaOH (or other electrolyte) solution will cause the metal to behave as if its interfacial tension is near zero. The mechanism behind this phenomenon has remained poorly understood because NaOH dissolves the oxide species, making it difficult to directly measure the concentration, thickness, or chemical composition of the film that forms at the interface. In addition, the oxide layers formed are atomically-thin. Here, we present a suite of techniques which allow us to simultaneously measure both electrical and interfacial properties as a function of applied electric potential, allowing for new insights into the mechanisms which cause the dramatic liquid metal, oxidation, and interfacial tension decrease in interfacial tension. A key discovery from this work is that the interfacial tension displays hysteresis while lowering the applied potential. We combine these observations with electrochemical impedance spectroscopy to evaluate how these changes in interfacial tension arise from chemical, electrical, and mechanical changes on the interface, and close with ideas for how to build a free energy model to predict these changes from first principles.

opencc-zeroDec 2023View details →

opencc-by-4.0Oct 2022View details →

Data from: Ultra-low-noise Microwave to Optics Conversion in Gallium Phosphide

Source data for Figures.

opencc-by-4.0Nov 2019View details →

Integrated Gallium Phosphide Nonlinear Photonics

Gallium phosphide (GaP) is an indirect bandgap semiconductor used widely in solid-state lighting. Despite numerous intriguing optical properties|including large chi(2) and chi(3) coefficients, a high refractive index (> 3), and transparency from visible to long-infrared wavelengths (0.55-11 \mum) its application as an integrated photonics material has been little studied. Here we introduce GaP-on-insulator as a platform for nonlinear photonics, exploiting a direct wafer bonding approach to realize integrated waveguides with 1.2 dB/cm loss in the telecommunications C-band (on par with Si-on-insulator). High quality (Q > 105), grating-coupled ring resonators are fabricated and studied. Employing a modulation transfer approach, we obtain a direct experimental estimate of the nonlinear index of GaP at telecommunication wavelengths: n2 = 1.2(5)*10^17 m^2/W. We also observe Kerr frequency comb generation in resonators with engineered dispersion. Parametric threshold powers as low as 3 mW are realized, followed by broadband (> 100 nm) frequency combs with sub-THz spacing, frequency-doubled combs and, in a separate device, efficient Raman lasing. These results signal the emergence of GaP-on-insulator as a novel platform for integrated nonlinear photonics.

opencc-by-4.0Sep 2024View details →

Gold, Lanthanum, Gallium, Cobalt and Tantalum quantification performed with relative standardization-NAA in candidate electronic waste (LED) reference material within the METROCYCLEEU project

Datasets containing uncertainty budgets of measurements performed with Neutron Activation Analysis (NAA) on electronic waste materials (specifically light-emitting diodes, LED). Results reported in the datasets are part of the characterization of CRM candidate material LED. Data are elaborated and resulting dataset files are obtained with INAA-INRIM 3.1 software, pre-release development version.

opencc-by-3.0Nov 2020View details →

Dataset related to the publication "An invar-based fabry-perot cavity refractometer with a gallium fixed-point cell for assessment of pressure"

The data set consists of; The published paper, all figures that present measurement or simulation data in .png and .fig format and the underlying data plotted in the figures in text format.  The published plots were generated from the fig files. The text files were generated by reading the plotted data from the fig files. The files are named Fig_XX were XX corresponds to the figure number in the publication.  The format of the text file is as follows. Before every data set there is a header consisting of; The number of the subplot where the data is plotted (Plot: XX), the number of the data set in the sub plot (DataSet: XX), and the color of the line or marker in the plot (Color: XX). The description of what each color represents can be found in the publication.

Gallium Ga 68 DOTA-NeoBOMB1 and Gallium Ga 68 PSMA-R2 PET/MRI in Diagnosing Participants With Recurrent Prostate Cancer

ClinicalTrials.gov study NCT03698370. IPD Sharing: NO. Countries: 1. Publications: 0.

Evaluation of Gallium-68-HBED-CC-PSMA Imaging in Prostate Cancer Patients

ClinicalTrials.gov study NCT02611882. IPD Sharing: NO. Countries: 1. Publications: 4.

Gallium-68 PSMA-11 PET in Patients With Biochemical Recurrence

ClinicalTrials.gov study NCT03396874. IPD Sharing: YES. Countries: 1. Publications: 1.

Evaluating the Clinical Accuracy of Gallium-68 PSMA PET/CT Imaging in Patients With Biochemical Recurrence of Prostate Cancer

ClinicalTrials.gov study NCT03822845. IPD Sharing: YES. Countries: 1. Publications: 5.

Gallium-68 PSMA-11 PET in Intermediate to High-risk Preprostatectomy Patients

ClinicalTrials.gov study NCT02919111. IPD Sharing: NO. Countries: 1. Publications: 2.

Radiolabeled Gallium-68 (68Ga-PSMA) for PET/CT Imaging to Detect Prostate Cancer

ClinicalTrials.gov study NCT03689582. IPD Sharing: YES. Countries: 1. Publications: 1.

Gallium-68 PSMA-11 Positron Emission Tomography (PET) Imaging in Patients With Biochemical Recurrence

ClinicalTrials.gov study NCT03353740. IPD Sharing: YES. Countries: 1. Publications: 2.

Erbium, Chromium: Yttrium, Scandium, Gallium, Garnet (Er,Cr:YSGG) Laser in Root Canal Disinfection

ClinicalTrials.gov study NCT05959629. IPD Sharing: NO. Countries: 1. Publications: 25.