Bond Length Variations Research Articles

Biocompatible AlOOH-based memristor with biomimicking synaptic functions for artificial nociceptor applications

Electronic devices with biomimetic synaptic characteristics are one of the most critical components in health monitoring and artificial intelligence. The design of neuromorphic responsive devices, however, yet remains a ground challenge. Herein, a biocompatible and electrically responsive boehmite material (γ-AlOOH) is utilized to fabricate artificial memristors to realize mimicking biological synapsefunctions. The obtained AlOOH memristor is flexible, highly transparent, and biocompatible, exhibiting nonvolatile resistive switching behaviours with low threshold voltages, high ON-OFF ratios (>103), good switching durability (>104 cycles), and long retention time (>104 s). Specifically, the device can mimic the biosynaptic functions, such as paired-pulse facilitation (PPF), long-term potentiation/depression (LTP/LTD), amplitude-dependent plasticity (SADP), and spike time dependent plasticity (STDP), and the typical sensitization, desensitization, hyperalgesia, and allodynia behaviours of the biological nociceptors. This study reveals that the AlOOH memristor with excellent artificial synapses is resulted by the high proton mobility along with the OH bond length variation of AlOOH subjected to applied stimuli, such as voltages, pulse width, and pulse intervals. Therefore, the biocompatible AlOOH-based memristors with artificial synapse behaviour have promising potential for the applications in high-performance neuromorphic devices and future artificial intelligence.

A comparative study on the local structures of the V4+ and Cu2+ centers in WO3

Abstract The local structures and electron paramagnetic resonance (EPR) parameters (the g factors g i and the hyperfine structure constants A i , with i = x, y, z) of the V4+ and Cu2+ centers in WO3 were theoretically investigated based on the perturbation formulas of the EPR parameters for 3d1 and 3d9 ions under rhombically compressed and elongated octahedra, respectively. In these formulas, the adopted crystal-field parameters (CFPs) are obtained from the superposition model which enables connection of the CFPs and hence the EPR parameters to the rhombic distortion. Based on the calculations, the impurity-ligand distances of the studied [VO6]8− (or [CuO6]10−) cluster are found to suffer the axial compression (or elongation) δz of about 0.098 Å (or 0.132 Å) along the z-axis, and the additional planar bond length variation δr (≈0.052 or 0.047 Å) along x- and y-axis, respectively, due to the Jahn–Teller (JT) effect.

Periodic Atomic Displacements and Visualization of the Electron-Lattice Interaction in the Cuprate

Traditionally, X-ray scattering techniques have been used to detect the breaking of the structural symmetry of the lattice, which accompanies a periodic displacement of the atoms associated with charge density wave (CDW) formation in the cuprate pseudogap states. Similarly, the Spectroscopic Imaging Scanning Tunneling Microscopy (SI-STM) has visualized the short-range CDW. However, local coupling of electrons to the lattice in the form of a short-range CDW has been a challenge to visualize, thus a link between these measurements has been missing. Here, we introduce a novel STM-based technique to visualize the local bond length variations obtained from topographic imaging with picometer precision. Application of this technique to the high-Tc cuprate superconductor Bi2Sr2CaCu2O8+{\delta} revealed a high-fidelity local lattice distortion of the BiO lattice as large as 2%. In addition, analysis of local breaking of rotational symmetry associated with the bond lengths reveals modulations around four-unit-cell periodicity in both B1 and E representations in the C4v group of the lattice, which coincides with the uni-directional d-symmetry CDW (dCDW) previously identified within the CuO2 planes, thus providing direct evidence of electron-lattice coupling in the pseudogap state and a link between the X-ray scattering and STM measurements. Overall, our results suggest that the periodic lattice displacements in E representations correspond to a locally-frozen version of the soft phonons identified by the X-ray scattering measurements, and a fluctuation of the bond length is reflected by the fluctuation of the dCDW formation near the quantum critical point.

Minimizing Bond Angle Distortion to Improve Thermal Stability of Cr3+ Doped Near‐Infrared Phosphor

AbstractBroadband near‐infrared (NIR) phosphor‐converted light‐emitting diodes are next‐generation smart NIR light sources. However, the NIR phosphor suffers from serious thermal quenching (TQ), resulting in efficiency reduction and spectral shift. Here, a novel strategy is realized to suppress TQ by minimizing bond angle distortion, completely different from the conventional TQ suppression approach through bond length variation. Li(Sr1−xCax)AlF6:Cr3+ NIR phosphor is taken as an example in which rotation between the two parallel fluorine planes perpendicular to the C3 axis in the [AlF6] octahedron is found to dominate TQ. Increasing x from 0 to 1 reduces the amplitude of the rotation from 16.17° to 5.06°, weakening the electron–phonon coupling and, consequently, raising the TQ temperature significantly from 320 to 570 K. This mechanism is elucidated from both theoretical calculations and spectroscopic studies. The findings open a new horizon for the exploration of thermally stable NIR phosphors.

Subpicosecond Molecular Rearrangements Affect Local Electric Fields and Auto-Dissociation in Water.

Molecular simulations of auto-dissociation of water molecules in an 81,000 atom bulk water system show that the electric field variations caused by local bond length and angle variations enhance proton transfer within ∼600 fs prior to auto-dissociation. In this paper, auto-dissociation relates to the initial separation of a proton from a water molecule to another, forming the H33O+ and OH- ions. Only transfers for which a proton's initial nearest covalently bonded oxygen remained the same for at least 1 ps prior to the transfer and for which that proton's new nearest acceptor oxygen remained the same for at least 1 ps after the transfer were evaluated. Electric fields from solvent atoms within 6 Å of a transferring proton (H*) are dominant, with little contribution from farther molecules. However, exclusion of the accepting oxygen in such electric field calculations shows that the field on H* from the other solvent atoms weakens as the time to transfer becomes less than 600 fs, indicating the primary importance of the accepting oxygen on enabling auto-dissociation. All resultant OH- and H3O+ ion pairs recombined at times greater than 1 ps after auto-dissociation. A concentration of 8.01 × 1017 cm-3 for these ion pairs was observed. The simulations indicate that transient auto-dissociation in water is more common than that inferred from dc-conductivity experiments (10-5 vs 10-7) and is consistent with the results of calculations that include nuclear quantum effects. The conductivity experiments require the rearrangement of farther water molecules to form hydrogen-bonded "water wires" that afford long-range and measurable proton transport away from the reaction site. Nonetheless, the relatively large number of picosecond-lived auto-dissociation products might be engineered within 2D layers and oriented external fields to offer new energy-related systems.

Investigate the effect of the synthesis method on the magnetic dynamic properties of SrAl4Fe8O19 hexaferrite

M-type SrAl4Fe8O19 hexaferrite was synthesized through three different synthesis methods, i.e., solid-state, co-precipitation, and sol–gel auto-combustion, to study the effect of synthesis on the structural and magnetic properties. X-ray diffraction (XRD), Rietveld refinement, high-resolution scanning electron microscope, and SQUID-magnetic property measurement system (MPMS) magnetometer were performed. The structural analysis demonstrated the formation of magnetoplumbite structure by these three synthesis methods. The variation in bond length and bond angle was also observed due to the synthesis methods, which affected the super-exchange interaction of the system. The solid-state method produced larger grains and more significant saturation magnetization i.e., 4.03 µm and 43.16 emu/gm, respectively, than the co-precipitate and sol–gel auto combustion methods. Magnetization–temperature (M−T) measurement revealed that the solid-state synthesized sample showed a higher blocking temperature than the rest. Magnetic susceptibility (χ) was performed with temperature dependence on different frequencies to demonstrate the magnetic dynamic properties of the SrAl4Fe8O19 hexaferrite. AC susceptibility results showed very strong magnetic interaction between particles leading to spin glass action at very low temperatures. The Neel–Arrhenius (N-A) & Vogel-Fulcher (V-F) models were used to determine the jump attempt time (τ0) and E0/KB (energy barrier or activation energy and Boltzmann constant) through AC susceptibility of magnetic particles. The τ0 and E0/KB were observed at about 2.84 × 10-11 sec and 871.31, respectively, for the solid-state synthesized sample by the V-F model.

Density functional theory study of energetics, local chemical environment and magnetic properties in a high-entropic MnNiSi0.2Ge0.2Sn0.2Al0.2Ga0.2 intermetallic magnet

Rare-earth-free magnetostructural MnNiSi-based solid solutions are considered as promising candidates for solid-state cooling applications. In this paper, we use density functional theory calculations to study the energetics, variations in atomic displacements and bond length, and magnetic properties of high-entropic, intermetallic MnNi-X (X = Si0.2Ge0.2Sn0.2Al0.2Ga0.2) magnet in both the low-symmetry Pnma and high-symmetry structures, where we confine the large configurational entropy to the non-magnetic X-site of the compound. Our calculations reveal that the high-entropic chemical substitution of Si0.2Ge0.2Sn0.2Al0.2Ga0.2 in the X-site carry fingerprints that favor a reduction in magnetostructural transition temperature with minimal impact of total magnetization. These results motivate a promising path of high-entropic X-site substitutions to tune the magnetostructural properties of MnNiSi-based solid solutions.

Piezoelectric substrate-induced strain engineering on tuning polarized Raman spectra of crystalline black phosphorus

A black phosphorus (BP) ultrathin nanosheet has significant research values in broad fields ranging from nano-electronics/photonics to quantum physics. Here, a piezoelectric actuator is utilized to perform biaxial strain engineering for the investigation of anisotropic Raman response of the ultrathin BP transferred to the oxide dielectric substrate. Three characteristic peaks exhibit redshift when tensile strain is applied, while the peaks reveal blueshift under compressive strain. When applying compressive strain of −0.2%, the Raman shift rate of B2g mode can reach up to 15.3 cm−1/%. In contrast, with the application of 0.2% tensile strain, the B2g mode is shifted by −12.2 cm−1/%. Furthermore, we calculated the Grüneisen parameters to deduce the relationship between the tensile or compressive strain and phonon behavior of crystalline BP. The physical mechanism behind the observation of strained Raman response is discussed, which is related to the variations of bond angle and bond length in BP. Additionally, biaxial strain modulation may change the anisotropic dispersion of BP, revealing the significant potential of BP in innovative polarized light detection.

First principles investigations of Cobalt and Manganese doped boron nitride nanosheet for gas sensing application

In the present study, Cobalt (Co) and Manganese (Mn) doped Boron Nitride nanosheet (BNNS) has been designed for density functional theory calculation. The variation in structural, electronic, and optical properties of BNNS due to Co and Mn doping has been studied along with the gas sensing ability of the designed nanosheets towards CH4, H2S, NH3, O3, PH3, and SO2 hazardous gases. Co and Mn doping in the BNNS result in an insulator-to-conductor and insulator-to-semiconductor transition, respectively. Co and Mn-doped BNNS show a stronger interaction with the selected gases resulting in high adsorption energy. The designed sheets show the strongest interaction with the O3 molecule resulting in a very high recovery time. Though doping results in significant structural deformation of the BNNS, a slight variation in bond length is observed due to gas adsorption. BNNS demonstrate a substantial drop in the band gap due to O3 and SO2 adsorption. In other cases, significant variations in the band gap of all the designed sheets are observed after gas adsorption. All the structures show a very high absorption coefficient of 105 cm−1 order which shows a slight peak shifting due to the interaction with toxic gases.

Interface alloying design to improve the stability and cohesion of W/HfC interface by first-principles study

Tungsten (W) and its composites have been regarded as the most promising candidate plasma-facing materials (PFMs) for fusion reactors due to its exceptional properties. In this work, we systematically investigated the effects of alloying elements (i.e., main groups, 3d-, 4d- and 5d-transition metals) on the stabilities and cohesion properties of the W/HfC interface by first-principles calculations. It is found that the alloying atoms of all main groups and transition metals of group VIB to IIB tend to segregate at the interface and increase the interface stability. In addition, when the alloy atom is doped, the change of interfacial bonding strength is highly correlated with the variation of bond length between interfacial atoms, and a linear model was proposed to account for most of the variations in the relative work of separation, with a R2 value of 0.94. Among these alloying elements, Re was found to enhance the cohesion strength of W/HfC interface by forming a strong Re-C bond based on the electronic structure analyses, and it is universal for Re to enhance the interfacial bonding strength in other W-transition metal carbide composites. This work provides a theoretical guidance for screening alloying elements that can improve mechanical properties of carbides dispersed W alloy in experiments.

Pressure and temperature effects on (TiZrTa)C medium-entropy carbide from first-principles

Multicomponent carbides have recently received considerable interest because of their remarkable material properties and vast material composition space compared to traditional carbides. However, the underlying physical mechanisms of multicomponent carbides remain poorly understood, particularly involving high pressure and temperature applications. Herein, the impacts of pressure and temperature on the stability, mechanical, and thermophysical properties of (TiZrTa)C are explored and evaluated by the density functional theory (DFT) computations. The study demonstrates that (TiZrTa)C is mechanically and thermally stable even at 100 GPa or 1500 K. (TiZrTa)C exhibits significant local lattice distortion, metallic conductivity, mechanical anisotropy, and covalent characteristics. Lattice distortion stems from the covalent bond length and angle variation caused by the random distribution of metal elements. Elevated pressure increases the elastic constants, Young's modulus, Bulk modulus, shear modulus, hardness, and fracture toughness of (TiZrTa)C. Increasing temperature leads to decrease the elastic constants and mechanical stiffness of (TiZrTa)C. The hybridization of C-p electrons and M-d electrons results in forming a pseudogap near the Fermi level and directional covalent bonds within the crystal. (TiZrTa)C has similar material properties to binary carbides, meaning that it has the potential to be used as a viable ultra-high temperature ceramic.

Computational analysis of geometric structures and edge‐termination effects of boron‐nitride and edge‐termination boron‐nitride nanoribbons

AbstractIn this work, we examined geometry, electronic structure, and edged termination effect of boron‐nitride nanoribbons (BNNRs) by employing localized Gaussian‐type orbital, periodic‐boundary condition, density functional theory (LGTO‐PBC‐DFT) calculations. Armchair (ABNNR) and zigzag (ZBNNR)‐type BNNRs are obtained and then bond lengths variation in two types of BNNRs are analyzed. We find that the B‐N bond length variation of ZBNNR is less diverse than that of ABNNR, and decreases with an increase in the ribbon width, monotonically. For those in ABNNR, it appears as an oscillatory convergence as a function of the ribbon width. The energy gap of edged termination ABNNR and ZBNNRs are also calculated using OH and SH as electron donating groups and CN‐, and Cl‐ as electron‐withdrawing groups. The introduction of SH‐ and Cl‐terminator significantly reduce the energy gap to the semiconducting region for ZBNNR, but for ABNNR. These calculated results may be exploited for nano‐electronic applications. To examine the surface behavior of the BNNRs, we also calculated their Raman shifts with the edge termination effects.

Periodic trends in trivalent actinide halides, phosphates, and arsenates.

Due to the limited abundance of the actinide elements, computational methods, for now, remain an exclusive avenue to investigate the periodic trends across the actinide series. As every actinide element can exhibit a +3-oxidation state, we have explored model systems of gas-phase actinide trihalides, phosphates, and arsenates across the series to capture the periodic trends. By doing so, we were able to capture the periodic trends down the halogen series as well, and for the first time we are reporting a study on actinide astatides. Using scalar and spin-orbit relativistic Density Functional Theory (DFT) calculations, we have explored the variations in bond lengths, bond angles, and the charges on actinides (An). Despite the use of different sets of ligands, the trends remain similar. The properties of trivalent Pa, U, Np, and Pu are nearly identical; similar ionic radii could be the reason. The actinide elements show a tendency to exhibit a pre-Pu and a post-Cm behaviour, with Am acting as a switch. This could be due to the change in the behaviour from d-f-type to f-filling/d-type at around Pu-Cm in the actinides as already proposed in the previous literature. Bond lengths in the AnX3 increase down the halide series, and the atomic charges decrease on the actinide elements.

Strain-dependent magnetic ordering switching in 2D AFM ternary V-based chalcogenide monolayers.

The lack of macroscopic magnetic moments makes antiferromagnetic materials promising candidates for high-speed spintronic devices. The 2D ternary V-based chalcogenides (VXYSe4; X, Y = Al, Ga) monolayers are investigated based on the density-functional theory and Monte Carlo simulations. The results reveal that the Néel temperature of the VGa2Se4 monolayer is 18 K with zigzag2-antiferromagnetic (AFM) spin ordering. Also, the magnetic ordering of V ions in VAl2Se4 and VAlGaSe4 monolayers prefer zigzag1-AFM coupling with Néel temperature of 47 K and 33 K, respectively. The magnetic anisotropy calculations demonstrate that the easy magnetization axis of the VXYSe4 monolayers is parallel to the y axis. In addition, the VXYSe4 monolayers can be adjusted from the AFM state to the ferromagnetic (FM) state under biaxial stretching, which can be attributed to the competition between d-p-d superexchange and d-d direct exchange caused by the variation of bond length. The transition temperature of VXYSe4 monolayers can be elevated above room temperature with the help of compression strain. In particular, the in-plane magnetic anisotropy is a robust characteristic regardless of the magnitude of the applied biaxial strain. These explorations not only enrich the family of AFM monolayers with excellent stability but also provide distinctive ideas for the performance control of AFM materials and their applications in nanodevices.

Yttrium- and zirconium-decorated Mg12O12-X (X = Y, Zr) nanoclusters as sensors for diazomethane (CH2N2) gas.

Diazomethane (CH2N2) presents a notable hazard as a respiratory irritant, resulting in various adverse effects upon exposure. Consequently, there has been increasing concern in the field of environmental research to develop a sensor material that exhibits heightened sensitivity and conductivity for the detection and adsorption of this gas. Therefore, this study aims to provide a comprehensive analysis of the geometric structure of three systems: CH2N2@MgO (C1), CH2N2@YMgO (CY1), and CH2N2@ZrMgO (CZ1), in addition to pristine MgO nanocages. The investigation involves a theoretical analysis employing the DFT/ωB97XD method at the GenECP/6-311++G(d,p)/SDD level of theory. Notably, the examination of bond lengths within the MgO cage yielded specific values, including Mg15-O4 (1.896 Å), Mg19-O4 (1.952 Å), and Mg23-O4 (1.952 Å), thereby offering valuable insights into the structural properties and interactions with CH2N2 gas. Intriguingly, after the interaction, bond length variations were observed, with CH2N2@MgO exhibiting shorter bonds and CH2N2@YMgO showcasing longer bonds. Meanwhile, CH2N2@ZrMgO displayed shorter bonds, except for a longer bond in Mg19-O4, suggesting increased stability due to shorter bond distances. The study further investigated the electronic properties, revealing changes in the energy gap that influenced electrical conductivity and sensitivity. The energy gap increased for Zr@MgO, CH2N2@MgO, CH2N2@YMgO, and CH2N2@ZrMgO, indicating weak interactions on the MgO surface. Conversely, Y@MgO showed a decrease in energy, suggesting a strong interaction. The pure MgO surface exhibited the ability to donate and accept electrons, resulting in an energy gap of 4.799 eV. Surfaces decorated with yttrium and zirconium exhibited decreased energies of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), as well as decreased energy gap, indicating increased conductivity and sensitivity. Notably, Zr@MgO had the highest energy gap before CH2N2 adsorption, but C1 exhibited a significantly higher energy gap after adsorption, implying increased conductivity and sensitivity. The study also examined the density of states, demonstrating significant variations in the electronic properties of MgO and its decorated surfaces due to CH2N2 adsorption. Moreover, various analysis techniques were employed, including natural bond orbital (NBO), quantum theory of atoms in molecules (QTAIM), and noncovalent interaction (NCI) analysis, which provided insights into bonding, charge density, and intermolecular interactions. The findings contribute to a deeper understanding of the sensing mechanisms of CH2N2 gas on nanocage surfaces, shedding light on adsorption energy, conductivity, and recovery time. These results hold significance for gas-sensing applications and provide a basis for further exploration and development in this field.

First-principles study of torsional single-walled carbon nanotubes

The controllable band gap of single-walled carbon nanotube (SWCNT) has become a research hotspot. This study introduces a torsional model that involves each rotating carbon atom along the axial direction of SWCNT, and a detailed description of the model creation process. Two guidelines for constructing the model are proposed, and the self-consistency of the torsion model is established through first-principles density functional theory. Initially, the band gap map of SWCNTs under torsion is present. As the twist strength increases, the band gap of SWCNT undergoes several phase transitions, including semiconductor-metal transition and metal-semiconductor transition. Moreover, we investigate the variations in the average bond length, average bond angle, and diameter of SWCNT under torsion. Furthermore, this work turns to the analysis of carbon atomic energy statistics, revealing distinct energy changes for different types of single-walled carbon nanotubes under identical torsion intensity. The findings shed light on the controllable band gap of SWCNTs, offering a theoretical foundation for the development of nanoelectronic devices and microintegrated circuits utilizing single-walled carbon nanotubes. In conclusion, this research presents a novel approach for exploring the controllable band gap of single-walled carbon nanotube through torsional manipulation. Theoretical insights into the behavior of SWCNTs under torsion provide valuable contributions to the field and pave the way for potential applications in nanoelectronics and microintegrated circuits.

Spin-dependent transport properties of a tetra-coordinated Fe(II) spin-crossover complex

Spin-crossover (SCO) complexes are being regarded as one of the most promising components of molecular spintronics, since they can exhibit different spin states (high-spin/HS or low-spin/LS) in response to external stimuli. Here, the electronic structure as well as the transport properties of a tetra-coordinated bis(formazanate) Fe(II) SCO complex have been investigated with the DFT + NEGF approach. From the calculated results, the transition between different spin states of the Fe(II) SCO complex is accompanied by a variation of the Fe-N bond length and the dihedral angle between the planes of the ligands. The I-V curves of the molecular junctions revealed that the SCO complexes in different spin configurations display significantly different bias-dependent characteristics. When the bias is above 0.1 V, the current through the HS-configured molecular junction increases rapidly and is significantly greater as compared to that in the LS configuration. Furthermore, the transport properties of the HS-state SCO complex are dominated by spin-up electrons, indicating a strong spin-filtering effect.

Innovative Insight into O2/N2 Permeation Behavior through an Ionomer Film in Cathode Catalyst Layers of Polymer Electrolyte Membrane Fuel Cells.

It is crucial to clarify the permeation behavior of O2 through the ionomer film for enhancing local O2 transport in cathodes of fuel cells. However, all existing studies mainly deal with pure O2 rather than air. Herein, the permeation behavior of the O2/N2 mixture through the ionomer film has been well explored in view of molecular bond length variations by molecular dynamics simulations. The bond lengths for O2 and N2 are shortened under a low hydration level when permeating through a dense layer with small free voids while no obvious change occurs at higher hydration. In the bulk ionomer region, O2 molecules residing in water domains are energetically unstable because the bond lengths deviate far from the equilibrium length; thus, O2 diffuses through the interfacial or hydrophobic regions. N2 molecules show similar properties with O2. This study provides a novel perspective on the permeation behavior of O2 and N2 through the ionomer film, which definitely benefits enhancing local O2 transport.

Strain induced structural phase transition and compositional dependent magnetic phase transition in Ti doped Bi0.80Ba0.20FeO3 ceramics

Bi0.80Ba0.20Fe1-xTixO3 (0≤x≤0.10) samples are prepared using solid state reaction technique. Bi3+ site is replaced with 20 % Ba2+ which induced structural modification from rhombohedral to pseudo cubic accompanied by the creation of oxygen vacancies owing to the charge reimbursement. Fe3+ site is replaced with different concentrations of Ti4+ keeping Ba content fixed. All the samples exhibited similar morphology and no significant variation in grain size is observed by substituting Ti at Fe site. All of the samples exhibited ferromagnetic behavior, which is ascribed to the destruction of spiral spin structures and changes in super-exchange interaction strength caused by variations in bond lengths of Fe–O and Fe–O–Fe. The decrease in magnetization with increasing Ti concentration is due to magnetic moment dilution caused by non-magnetic Ti4+. An anomalous trend in magnetization is observed for magnetic measurements at low temperature (77 K) where structural transformation from ferromagnetic to diamagnetic behavior was noted for 10% Ti content. Further, because of the incorporation of Ti4+, an improved dielectric property was observed due to increase in resistivity and decrease in the defect concentration (oxygen vacancies). In the present study, it was concluded that optimum concentration of Ba2+ (20%) and Ti4+ co-doped BiFeO3 systems have shown enhanced multiferroic properties at room temperature.

Dual Ion Conducting Solid Electrolyte and Electrochemical Protocol for Interface Design

The major challenges for the development of all solid-state batteries (ASSBs), that would be cheaper and can be charged and discharged faster, are stable solid electrolytes and robust interfacial design. We report the dual ion conduction capability of Na-based NASICON type super ion conductor materials using Na1+xMnx/2Zr2-x/2(PO4)3 (NMZP) as a candidate system [1]. This method enables the use of Na-based NASICON material family in both Na as well as Li all solid-state batteries (Figure 1a). The ionic conductivity NZMPs increased as the x value increased and x = 2 showed the highest room temperature conductivities. Crystallographic analysis using neutron diffraction revealed that conductivities observed in these materials are related to the variations in the Na-O bond length and the concentration of mobile sodium content. Using Galvano static plating and stripping tests, we show that these NMZPs boast good cycling stability against both Na and Li metals which also reveals dual ion conduction. Mechanistic investigations through postmortem SEM/EDS and XPS characterizations of the alkali metal and the cycled NMZPs confirm that the Na-Li ion exchange occurs readily in these materials when electrochemically cycled. ASSBs have several interfaces and the interface properties vary depending on the contact condition, energy states, type defects, and chemical/electrochemical stability. ASSB life and performance rely largely on these interfaces since dendrite formation, Li-depleted space-charge layer generation, and spatial variation in interfacial adhesion originate at the interfaces, which leads to battery failure. Stabilizing Li | SE interface is crucial for the development of high-energy-density solid-state batteries. Current approaches in Li metal stabilization employ energy and cost-intensive protocols that have a detrimental impact on the techno-economic feasibility of the ASSBs. This presentation will focus on the facile, electrochemical protocol for improving the interfacial impedance and contact at the Li | Li6.25Al0.25La3Zr2O12 (LALZO) interface. Implementation of a fraction of second short duration high voltage pulse to a poorly formed interface leads to a sustained improvement in contact impedance and lower overpotentials for electrodeposition and electro-dissolution [2] (Figure 1b). This high pulse protocol does not induce the formation of dendrites on the symmetric cells. This electrochemical protocol has direct application in battery formation cycles as well as online management systems for ASSBs. Reference [1]. A. Parejiya, R. Essehli, R. Amin, J. Liu, N. Muralidharan, H. M. Meyer, III, D. L. Wood, III, and I. Belharouak, ACS Energy Letters 6 (2021) 429.[2]. A. Parejiya, R. Amin, M.B. Dixit, R. Essehli, C. Jafta, D.L. Wood, and I. Belharouak., ACS Energy Lett. 6 (2021) 3669. Figure 1