Density Shift Research Articles

Conformational change-modulated spin transport at single-molecule level in carbon systems

Controlling the spin transport at the single-molecule level, especially without the use of ferromagnetic contacts, becomes a focus of research in spintronics. Inspired by the progress on atomic-level molecular synthesis, through first-principles calculations, we investigate the spin-dependent electronic transport of graphene nanoflakes with side-bonded functional groups, contacted by atomic carbon chain electrodes. It is found that, by rotating the functional group, the spin polarization of the transmission at the Fermi level could be switched between completely polarized and unpolarized states. Moreover, the transition between spin-up and spin-down polarized states can also be achieved, operating as a dual-spin filter. Further analysis shows that, it is the spin-dependent shift of density of states, caused by the rotation, that triggers the shift of transmission peaks, and then results in the variation of spin polarization. Such a feature is found to be robust to the length of the nanoflake and the electrode material, showing great application potential. Those findings may throw light on the development of spintronic devices.

Rational design of BiFeO3 nanostructures for efficient charge carrier transfer and consumption for photocatalytic water oxidation

Crystal surfaces play significant role in controlling the photocatalytic properties of a semiconductor material. In this work, we report the controlled synthesis of various BiFeO3 nanostructures and validate the influence of various crystal surfaces towards photocatalytic properties for water oxidation. The synthesis of BiFeO3 nanostructures including hexagons, rectangular cuboids and nanoplates is achieved in NaOH aqueous solutions with various concentrations via a facile hydrothermal method. High-resolution transmission electron microscopy (HRTEM) revealed NaOH concentration dependent growth direction of various BiFeO3 nanostructures. BiFeO3 rectangular cuboids dominated with (102) crystal facets exhibited higher surface photovoltage (SPV) response confirming efficient charge carrier separation compared to hexagons and nanoplates. Furthermore, the photoelectrochemical measurements also confirmed the improved photocurrent density and positive shift in flat band potential for BiFeO3 rectangular cuboids studied via Mott-Schottky plots. Resultantly, BiFeO3 rectangular cuboids demonstrated superior photocatalytic O2 evolution activity of 82.2 µmol h−1 g−1 compared to 42.6 µmol h−1 g−1 and 53 µmol h−1 g−1 for hexagons and nanoplates, respectively, without any cocatalyst under visible light irradiation.

Anion complexes of diborane derivatives inserted to benzene

AbstractThe complexes formed between three molecules where the diboryl units (HBH2BH) replace the C2H2 moiety in benzene (B6H12, C2B4H10, and C4B2H8) and 10 anions (H−, F−, Cl−, Br−, OH−, CCH−, CH3−, CN−, N3−, and CNO−) have been studied using MP2 computational methods with the complete basis set (CBS) extrapolation scheme. The stability of the complexes for a given anion increases with the number of diborane units in the molecules, and these energy values are correlated with the presence of different anions and number of diborane units. The electron density of the complexes has been characterized and analyzed using the quantum theory of atoms in molecules (QTAIM) and electron density shift (EDS) models.

Ion implantation of tunnel junction as a method for defining the aperture of III-nitride-based micro-light-emitting diodes.

We report on III-nitride-based micro-light-emitting diodes (µLEDs) operating at 450 nm wavelength with diameters down to 2 µm. Devices with a standard LED structure followed by a tunnel junction were grown by plasma-assisted molecular beam epitaxy. The emission size of µLEDs was defined by shallow He+ implantation of the tunnel junction region. The ion implantation process allows to create flat devices, applicable to further epitaxial regrowth. The shift of current density for the maximum external quantum efficiency as a function of µLEDs diameter was observed. This effect may be a fingerprint of the change in the external efficiency related to the lateral carrier diffusion (limited by holes) in InGaN quantum wells.

Non-volatile flash memory based on Van der Waals gate stack using bandgap tunability of hexagonal boron nitride

Electronic devices based on two-dimensional (2D) materials have extended their applications to non-volatile flash memory devices. The gate stack is a key structure in flash memory devices, and the conventional silicon-oxide-nitride-oxide-silicon (SONOS) structure has been widely applied. In this study, we propose a van der Waals (vdW) gate stack based on graphene, molybdenum disulfide (MoS2), and hexagonal boron nitride (hBN) for next-generation flash memory devices. Owing to the bandgap tunability of hBN by functionalization, hBN is capable of forming a tunneling layer, charge trap layer, and blocking layer with different bandgaps, resulting in a suitable energy band offset for program/erase operations and charge storage. This study on the vdW gate stack of MoS2/tunneling hBN/charge trap hBN/blocking hBN/graphene was carried out through technology computer-aided design (TCAD) simulation. The trapped charge density and threshold voltage (Vth) shift were investigated for different bandgaps of the hBN layers. Moreover, the pulse width and cycle were varied to reveal the charge-trapping behavior for further applications.

Intermolecular interactions between cyclo[18]carbon and XCN (X = H, F, Cl, Br, I): a theoretical study.

In this article, the intermolecular interactions of cyclo[18]carbon with XCN (X = H, F, Cl, Br, I) were investigated in detail by quantum chemistry calculations and wavefunction analyses. The electrostatic potential and van der Waals potential of cyclo[18]carbon were examined, then the structures of the complexes, the interaction energies of the intermolecular interactions were studied. Quantum theory of atoms in molecules analysis was performed to help understand the specific interactions. The XCN molecules can insert into the cyclo[18]carbon ring, and ClCN, BrCN, and ICN could also bind with cyclo[18]carbon from outside. Charge transfer in the inner complex is more prominent than that of the outer complex. Plots of electron density difference revealed that electron density shift was significantly different when the X atom changed. The main driving force for molecular binding is dispersion attraction, which is disclosed by interaction region indicator analysis and energy decomposition calculations.

Crystal plasticity modeling of strain-induced martensitic transformations to predict strain rate and temperature sensitive behavior of 304 L steels: Applications to tension, compression, torsion, and impact

This paper advances crystallographically-based Olson-Cohen (direct γ → α’) and deformation mechanism (indirect γ→ε→α’) phase transformation models for predicting strain-induced austenite to martensite transformation. The advanced transformation models enable predictions of not only strain-path sensitive, but also of strain-rate and temperature sensitive deformation of polycrystalline stainless steels (SSs). The deformation of constituent grains in SSs is modeled as a combination of anisotropic elasticity, crystallographic slip, and phase transformation, while the hardening is based on the evolution of dislocation density and explicit shifts in phase fractions. Such grain-scale deformation is implemented within the meso‑scale elasto-plastic self-consistent (EPSC) homogenization model, which is coupled with the implicit finite element (FE) method to provide a constitutive response at each FE integration point for solving boundary value problems at the macro-scale. Parameters pertaining to the hardening and transformation models within FE-EPSC are calibrated and validated on a suite of data including flow curves and phase fractions for monotonic compression, tension, and torsion as a function of strain-rate and temperature for wrought and additively manufactured (AM) SS304L. To illustrate the potential and accuracy of the integrated multi-level FE-EPSC simulation framework, geometry, mechanical response, phase fractions, and texture evolution are simulated during gas-gun impact deformation of a cylinder and quasi-static tension of a notched specimen made of AM SS304L. Details of the simulation framework, comparison between experimental and simulation results, and insights from the results are presented and discussed.

On predicting bonding patterns of small clusters of alkaline-earth (Be, Mg) and triel (B, Al) fluorides: a balance between atomic size and electron-deficient character

The structures, bonding and stability of (MF2)m:(M´F3)n (M = Be, Mg; M´ = B, Al; m = 0,1,2; n = 0,1,2) clusters were obtained at the B3LYP/aug-cc-pVTZ level of theory. To understand trends across this set of closely related atoms, an analysis of the results obtained using atoms in molecules (AIM), electron localisation function (ELF) and electron density shift (EDS) approaches, permits to identify subtle dissimilarities when the first-row elements, Be and B, are replaced by the second-row counterparts, Mg and Al. For dimers this replacement involves an increase in the bonding enthalpies as a direct consequence of a much larger ionic character of the derivatives including second-row elements. For trimers and tetramers, rather stable structures involving penta-coordinated aluminium atoms are formed, which are not found for the B-containing analogues. In all clusters investigated the electronic environment around each monomer does not change significantly neither with nature of the monomers interacting with it or with the size of the cluster, though some small cooperative effects are observed when analyzing the binding enthalpies. The important consequence is that the stability of larger clusters can be easily predicted through a statistical treatment of the values obtained for the smaller ones.

A New Hybrid MCDM Model for Insulation Material Evaluation for Healthier Environment

One of the easiest and most common methods for effectively reducing building energy demand is the selection of adequate thermal insulation materials. Thermal insulation is a substantial contribution and an evident, logical and practical first stage toward improving energy performance, particularly in envelope-load-dominant structures located in difficult climate zones. Today’s insulating materials come in a broad variety of sizes and shapes, each with its a own qualities. It is well acknowledged that material selection is one of the most difficult and time-consuming aspects of a construction project. Therefore, choosing the right insulation material is also a very important topic to increase energy efficiency. However, it is a complex problem with many criteria and alternatives. This study integrates three different multi criteria decision making methods, which are Fuzzy Best-Worst Method, CRiteria Importance Through Inter-criteria Correlation and Mixed Aggregation by COmprehensive Normalization Technique. In this study, the following eight criteria were taken into account in the evaluation: thermal conductivity, periodic thermal transmittance, specific heat, density, decrement factor, surface mass, thermal transmittance, and thermal wave shift. The first method will be used to find the subjective weights, while the second method will be used to find the objective weights. The third method will be used to rank the insulation materials. According to the results of the Fuzzy Best-Worst Method, the most important criterion was determined as thermal conductivity. According to the results of the CRiteria Importance Through Inter-criteria Correlation, the most important criterion was determined as thermal wave shift. According to the results of the Mixed Aggregation by COmprehensive Normalization Technique, the top 10 insulation materials are as follows: polyisocyanurate, polyurethane (1), polyurethane (2), wood fiber (1), kenaf, jute, cellulose (2), wood fiber (1), XPS (1) and XPS (2). According to the results of the proposed method, polyisocyanurate was determined as the best insulation material for healthier environment. This study makes two contributions to the literature: first, a new hybrid method was developed in this study. Secondly, in this study, the newly introduced Mixed Aggregation by COmprehensive Normalization Technique method was used.

Insight into Spodium-π Bonding Characteristics of the MX2⋯π (M = Zn, Cd and Hg; X = Cl, Br and I) Complexes-A Theoretical Study.

The spodium–π bonding between MX2 (M = Zn, Cd, and Hg; X = Cl, Br, and I) acting as a Lewis acid, and C2H2/C2H4 acting as a Lewis base was studied by ab initio calculations. Two types of structures of cross (T) and parallel (P) forms are obtained. For the T form, the X–M–X axis adopts a cross configuration with the molecular axis of C≡C or C=C, but both of them are parallel in the P form. NCI, AIM, and electron density shifts analyses further, indicating that the spodium–π bonding exists in the binary complexes. Spodium–π bonding exhibits a partially covalent nature characterized with a negative energy density and large interaction energy. With the increase of electronegativity of the substituents on the Lewis acid or its decrease in the Lewis base, the interaction energies increase and vice versa. The spodium–π interaction is dominated by electrostatic interaction in most complexes, whereas dispersion and electrostatic energies are responsible for the stability of the MX2⋯C2F2 complexes. The spodium–π bonding further complements the concept of the spodium bond and provides a wider range of research on the adjustment of the strength of spodium bond.

Project development of a precision installer for measuring inhomogeneous density of the solution in the process of automation of the technological software and hardware complex

A project of a precision installer for measuring the inhomogeneous density of the solution has been developed. This module is one of the key components of an automated program-controlled complex created for the encapsulation of cell transport systems. An analysis of existing methods for determining the values of viscosity and density shifts shows that optical measurement methods are the most appropriate for designing the precision installer due to their simplicity and reliability. Implementation of optical measurement is also due to the need to ensure sterility of analyzed material, as well as non-destructive testing of liquid. Using the ultrasound method requires immersion in liquid of transmitting element and receiver, which violates the principle of sterility. According to the results of measurements, it was found that the method of recording optical radiation can determine density distribution in the cuvette volume after centrifugation with a high degree of accuracy. The exact positioning of the needle for the selection of liquid has been achieved. A measuring optical module has been developed to determine the inhomogeneous density of the liquid. Accurate positioning of the carousel at given points by mounting permanent neodymium magnets in the base of cuvette compartments has been achieved. The simplification of measuring configuration by the exclusion of dispersive elements, filters and the monochromator significantly reduces the cost of measuring equipment and makes it easy to implement for solving such problems. The introduction of modern digital technologies into the project makes it possible to process signal packets from positioning sensors and through individual channels, which is especially important for automating measurement and positioning processes, taking into account sterility

Coumarin 343 in aqueous solution: theoretical analysis of absorption.

Vibronic coupling and hydration were taken into account when describing the absorption of coumarin C343 (both neutral and anionic forms) in an aqueous media. It was shown that the B3LYP functional with the 6-31 + + G(d,p) basis set and the IEFPCM solvent continuum model give theoretical vibronic absorption spectra, which are coincide with the experimental ones. Of the structural differences between C3430 and C343-, there is a different twisting of the carboxyl group additionally changing due to excitation. Upon excitation, a significant shift in the electron density occurs from the C10 atom to the C4 atom only. Thus, a charge transfer on the scale of the entire molecule does not occur. Different hydration complexes with strongly bound water molecules have been analyzed.

Determining the atom number from detection noise in a one-dimensional optical lattice clock

In this paper, we demonstrate in situ synchronous frequency comparison between distinct regions in a one-dimensional optical lattice. The synchronous comparison instability is well below the Dick limit and agrees with the limit induced by atomic detection noise. The absolute atom number is extracted from the synchronous comparison instability with an uncertainty below 3%. Surpassing the performance of absorption imaging, this method provides a way to directly and precisely determine the absolute atom number from detection noise. Taking advantage of the inhomogeneous density distribution over the whole lattice, the density shift can also be conveniently measured by this synchronous frequency comparison method. Inconsistent with the expectation of the linear relationship between density shift and atom number difference, nonlinearity is observed, indicating that the assumption of an identical density shift coefficient over the whole lattice is not always safe.

Production characteristics of Porphyridium purpureum (Bory) Drew et Ross semi-continuous culture at low irradiance

The red microalga Porphyridium purpureum (Bory de Saint-Vincent, 1797) Drew et Ross, 1965 is of great interest to researchers as a source of various biologically valuable substances, with their content in cells being determined by cultivation conditions. Phycobiliproteins concentration in P. purpureum cells depends directly on nitrogen concentration in the culture medium and cell irradiance. Semi-continuous cultivation allows maintaining these parameters at a level given. The aim of the work was to study P. purpureum culture growth and B-phycoerythrin (B-PE) accumulation and production at low irradiance, with minimal rates of pigment photodestruction. P. purpureum semi-continuous (quasi-continuous) cultivation was carried out at a specific flow rate of 0.1 and 0.2 day−1 and mean surface irradiance of 5 and 25 W·m−2. P. purpureum culture productivity increased by 1.6–17 times both with a rise in surface irradiance 5 to 25 W·m−2 and an increase in the medium specific flow rate 0.1 to 0.2 day−1. Maximum productivity values for the experimental conditions (0.21 g·L−1·day−1) were recorded at 25 W·m−2 and 20 % medium specific flow rate, but those were 1.5–2 times lower than the precalculated ones. In P. purpureum cells, protein and B-PE concentrations decreased both with an increase in surface irradiance (by 15–20 %) and with a rise in a specific flow rate (by 1.5 times) for all the variants. The shifts in protein and B-PE concentration in P. purpureum culture had a unidirectional character as well; those mainly corresponded to the shift in the culture density. P. purpureum B-PE productivity increased by 1.5–1.9 times with a rise in surface irradiance 5 to 25 W·m−2. Maximum B-PE productivity (13 mg·L−1·day−1) was recorded for the variants of the experiment with a surface irradiance of 25 W·m−2 (0.1 and 0.2 day−1). An increase in specific irradiance of P. purpureum cells 7 to 26 W·g−1 resulted in a rise in biomass productivity by 2.6 times; in B-PE productivity, by 1.8 times; and in protein productivity, by 1.7 times. In the experiment, irradiance was the factor determining the production characteristics of P. purpureum culture, and it was confirmed by the data obtained.

Investigation of the Way of Phase Synchronization of a Self-Injected Bunch and an Accelerating Wakefield in Solid-State Plasma

The electron acceleration, in a laser wakefield accelerator, controlled through plasma density inhomogeneity is studied on a basis of 2.5-dimensional particle-in-cell simulation. The acceleration requires a concordance of the density scale length and shift of the accelerated electron bunch relative to wake bubble during electron acceleration. This paper considers the excitation of a wakefield in plasma with a density equal to the density of free electrons in metals, solid-state plasma (the original idea of Prof. T. Tajima), in the context of studying the wakefield process. As is known in the wake process, as the wake bubble moves through the plasma, the self-injected electron bunch shifts along the wake bubble. Then, the self-injected bunch falls into the phase of deceleration of the wake wave. In this paper, support of the acceleration process by maintaining the position of the self-injected electron bunch using an inhomogeneous plasma is proposed. It is confirmed that the method of maintaining phase synchronization proposed in the article by using a nonuniform plasma leads to an increase in the accelerating gradient and energy of the accelerated electron bunch in comparison with the case of self-injection and acceleration in a homogeneous plasma.

Investigation of the Role of Sr and Development of Superior Sr-Doped Hexagonal BaCoO3−δ Perovskite Bifunctional OER/ORR Catalysts in Alkaline Media

Superior electrocatalytic activity of catalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) enhances the reversible energy storage efficiency of metal–air batteries and electrochemical water splitting performances to produce hydrogen. Sr incorporation in the BaCoO3−δ lattice in the form of 2H-type Ba1–xSrxCoO3−δ (0 ≤ x ≤ 0.5) perovskites enhances both ORR and OER activities. A relatively low overpotential of 395 mV at 10 mA/cm2, lower Tafel slope of 64.95 mV dec–1, and good stability up to 500 cycles (10% reduction of current density and overpotential shift to a 0.04 V higher value) in a 0.1 M KOH electrolyte were obtained for the Ba0.5Sr0.5CoO3−δ electrode. Incorporation of Sr in the BaCoO3−δ lattice decreases the Co–O–Co bond angle that results in a superior orbital overlap between Co(3d) and O(2p) orbitals and a decrease in lattice parameters that generates lower surface oxygen separation pathways and a large number of active sites on the (011) planes, making Ba0.5Sr0.5CoO3−δ a superior catalyst with increased OER/ORR activity. The formation of oxygen-vacant CoO5 octahedra containing surface oxygen vacancies, the presence of Co3+/4+ valence states, and the superior overlap between O(2p)-Co(3d) bands (covalency increases) result in a higher electronic conductivity, a lower flat band potential, and improved OER and ORR activities. The key highlight of this work is the matching of the onset potential with the calculated flat band (Efb) potential from the Mott–Schottky plot. The Mott–Schottky plot was utilized to calculate the flat band potential (Efb) that indicates the basic information about the electrochemical interface potential between the electrode and the electrolyte, and in the case of Ba0.5Sr0.5CoO3−δ, it matches very well with the onset potential for the OER activity of the catalyst.

A novel KCNQ2 missense variant in non-syndromic intellectual disability causes mild gain-of-function of Kv7.2 channel

BackgroundHeterozygous variants of KCNQ2 can cause KCNQ2 associated neurodevelopmental disorder, mainly are benign (familial) neonatal or infantile epilepsy (B(F)NE or B(F)IE) and developmental epileptic encephalopathy(DEE). Moreover, some intermediate phenotypes, including intellectual disability (ID), and myokymia are related to the gene. MethodsWe collected a non-syndromic ID male patient with a novel KCNQ2 missense variant. Whole cell electrophysiology, western blotting, and immunofluorescence were adopted to analyze the variant’s functional alterations. ResultsThe patient presented with global developmental delay since his infancy. He still had profound ID but did not have epilepsy at the adolescence. The de novo KCNQ2 variant p.R75C (NM_172107) in the NH2 domain identified here showed a slightly hyperpolarized shift of activation curves and larger current density in homomeric configurations, which could be abolished in co-expression with Kv7.2 or Kv7.3 wild-type. Western blotting and immunocytochemistry supported that the expression of variant p.R75C is lower than the Kv7.2 wild-type. The findings indicated variant p.R75C causes mild gain-of-function (GOF) of Kv7.2 channel. ConclusionsWe report a non-syndromic ID patient with a KCNQ2 mild GOF variant, adding evidence for this rare clinical phenotype in the disorder. We propose that individuals with KCNQ2 GOF variants are prone to have cognitive impairments.

The assessment of physicochemical properties of Cisplatin complexes with purines and vitamins B group

The positively charged products of Cisplatin hydrolysis can form bonds with Guanine and Adenine, showing the ability to crosslink with nucleobases within the double helical DNA, and leading to apoptosis of the neoplastic cell. It has been proved that the presence of chemicals other than nucleobases, compound of aromatic rings with a nitrogen lone pair on the ring, such as B vitamins, may have a competitive character in relation to a chemotherapeutic drug. A theoretical study confirms the stability of bonds formed not only between Cisplatin and Guanine/Adenine but also Cisplatin and B vitamins, namely Thiamine (vit.B1), Niacin (vit.B3), Riboflavin (vit.B2) and Pyridoxal phosphate (vit.B6). That is why it seems to be justified to conduct the research on the physicochemical, thermochemical and optical properties of mono and diaqua complexes of Cisplatin with nucleobases and B vitamins. Equally important is carrying out such research as spectroscopic measurements, bond order analysis and vibrational analysis of the studied complexes. The complexation reaction is spontaneous and thermodynamically favored with the high electronegativity value, a shift of the electron density from the metal zone towards organic compounds, a reduction the value of gap parameter and a shift of the maximum absorbance ΔλABS towards longer wavelengths. Moreover, the performed density variation upon photoexcitation showed the contributions from HOMO→LUMO transition, where the maximum of the absorption band shifts towards shorter wavelengths compared to the cisPt derivatives, thereby lowering the photoexcitation energy. The formation of complexes causes the reduction of energy gap (ΔEgap) values and show higher kinetic stability with high values of gap. The bonding energies between Cisplatin and the target molecules were performed. Cisplatin forms the strongest bonds with Guanine and Pyridoxal phosphate (vit.B6). The vibrations of Pt–N7 bond in complexes occur in the low range of frequencies with low intensities. Only in case of nucleobases appeared vibrations of Pt–N7 in high frequencies. The highest intensity is shown by symmetry and asymmetry stretching vibrations of H–O(H2O) bonds in the high range of frequencies. The vibrations related with ammonium groups (NH3) of great importance appear in the medium and high range of frequencies. The complexes with Guanine show the highest intensities. A theoretical IR spectra were studied. The obtained calculated IR spectra for native nucleobases and vitamins from B group were compared with their experimental FT-IR. So the conducted research provides theoretical knowledge in practical terms regarding the physicochemical and spectral properties of the formed Cisplatin complexes with both nucleobases and B vitamins. Theoretical and partially experimental studies of the molecular and electronic structure or prediction of spectroscopic characteristics are quite useful for better understanding of the reactivity of this drug with physiological target molecules.

Electron Microscope Studies of the 01Cr17Ni13Mo3 Austenitic Steel Structure after Cold Rolling Combined with Hydrogen Alloying with Varying Degrees of Deformation

In this paper, we consider the effect of cold rolling and hydrogen alloying on the formation of twin boundaries of the corrosion resistance of austenitic steel 01Cr17Ni13Mo3. Using the method of transmission electronic microscopy, microdiffraction patterns were obtained. The analysis of microdiffraction patterns indicates the formation of a developed grain-subgrain structure with small-angle and large-angle misorientation. The structure has a high dislocation density, deformation twins and localized shift bands. It was established that plastic deformation by flat rolling to ε = 90 % at room temperature does not contribute to the appearance of a noticeable amount of α' and ε-martensite. At the temperature of liquid nitrogen, the samples were found to form a small fraction of the α'-martensite phase. Such a small amount of martensite can contribute to steel strengthening, and a decrease in the rolling temperature will lead to an increase in the strength properties of steel. It was detected that the density of twin boundaries under the decrease in the rolling temperature but with the same intensity of hydrogen saturation is significantly higher. A noticeable reduction in the width of the twin lamellas was revealed.

Association of lens density quantified by IOLMaster 700 with lenticular myopia in nuclear cataract.

To explore the associated ocular parameters with lenticular myopia and assess the correlation between lens density and myopic shift. This retrospective cross-sectional study enrolled 50 patients with lenticular high myopia as the study group and 85 cases as the validation group. Lens density was obtained through swept-source optical coherence tomography (SS-OCT, IOLMaster 700) and measured by Image J software. Linear regression analysis and correlation analysis were applied to study the association between lenticular myopia and ocular variables. Receiver operating characteristic curves and calibration charts were plotted for nuclear density (ND) in identifying lenticular high myopia. Both ND and lens thickness were discovered to be associated with spherical equivalent refraction and lens power (p < 0.05); yet, only ND was significantly correlated with lenticular myopia, as the difference of nuclear density (NDdiff) between the lenticular myopic eye and the fellow eye was significantly correlated with the interocular difference of spherical equivalent refraction (SERdiff, r = - 0.752, p < 0.001) and the interocular difference of lens power (LPdiff, r = 0.834, p < 0.001). The ND is a good metric for diagnosing lenticular high myopia, with the area under curve (AUC) being 0.898 (0.821-0.949) and the cut-off value being 98.88 pixel units. The accuracy of the cut-off value in the validation group was 82.35%. Average ND quantified by IOLMaster 700 is not only associated with lenticular myopia but is a suitable metric for predicting the amount of myopic shift.