Expansion of financial system and productionbased carbon emissions: evidence from highincome countries

The recent environmental and energy economics is more influential towards sustainability of the environment. Unlike the existing literature covering extensively consumption-based carbon emissions factors, this research tends to identify the factors influencing production-based carbon emissions in the G7 economies from 1989 to 2020. The study utilised various panel econometric approaches to find the presence of cross-section dependence, stationarity of variables, and the validation of long-run cointegration association between the variables. This study uses a non-parametric long-run estimator (method of moment quantile regression) to explore the association between these variables at four (Q0.25, Q0.50, Q0.75, Q0.90) quantiles. The estimated results revealed that economic growth is a significant positive factor of productionbased carbon emissions, whereas the influence of imports is positive but insignificant across the quantiles. On the other hand, this study found the negative and significant influence of exports and financial expansion on the production-based carbon emissions and helps to achieve environmental sustainability in the region. The non-parametric (bootstrap quantile regression) and parametric (robust regression) robustness tests also validate the earlier estimator’s empirical findings. Based on the results obtained, this study recommends increased investment in environmentally friendly energy resources, technologies, and energy efficiency, increased exports, and strengthening financial institution

Development of a Transferable Reactive Force Field of P/H Systems: Application to the Chemical and Mechanical Properties of Phosphorene

ReaxFF provides a method to model reactive chemical systems in large-scale molecular dynamics simulations. Here, we developed ReaxFF parameters for phosphorus and hydrogen to give a good description of the chemical and mechanical properties of pristine and defected black phosphorene. ReaxFF for P/H is transferable to a wide range of phosphorus and hydrogen containing systems including bulk black phosphorus, blue phosphorene, edge-hydrogenated phosphorene, phosphorus clusters and phosphorus hydride molecules. The potential parameters were obtained by conducting unbiased global optimization with respect to a set of reference data generated by extensive ab initio calculations. We extend ReaxFF by adding a 60{\deg} correction term which significantly improves the description of phosphorus clusters. Emphasis has been put on obtaining a good description of mechanical response of black phosphorene with different types of defects. Compared to nonreactive SW potential [1], ReaxFF for P/H systems provides a huge improvement in describing the mechanical properties the pristine and defected black phosphorene and the thermal stability of phosphorene nanotubes. A counterintuitive phenomenon is observed that single vacancies weaken the black phosphorene more than double vacancies with higher formation energy. Our results also show that mechanical response of black phosphorene is more sensitive to defects for the zigzag direction than for the armchair direction. Since ReaxFF allows straightforward extensions to the heterogeneous systems, such as oxides, nitrides, ReaxFF parameters for P/H systems build a solid foundation for the reactive force field description of heterogeneous P systems, including P-containing 2D van der Waals heterostructures, oxides, etc

Spectroscopic study of light scattering in linear alkylbenzene for liquid scintillator neutrino detectors

We has set up a light scattering spectrometer to study the depolarization of light scattering in linear alkylbenzene. From the scattering spectra it can be unambiguously shown that the depolarized part of light scattering belongs to Rayleigh scattering. The additional depolarized Rayleigh scattering can make the effective transparency of linear alkylbenzene much better than it was expected. Therefore sufficient scintillation photons can transmit through the large liquid scintillator detector of JUNO. Our study is crucial to achieving the unprecedented energy resolution 3\%/$\sqrt{E\mathrm{(MeV)}}$ for JUNO experiment to determine the neutrino mass hierarchy. The spectroscopic method can also be used to judge the attribution of the depolarization of other organic solvents used in neutrino experiments.Comment: 6 pages, 5 figure