SC State Research Articles

Understanding into atomic structures and electronic properties from the analysis of intramolecular junctions in carbon nanotubes

Octuplet arrangements of intra-molecular junctions (IJs) are selected and studied in order to forecast each one's atomic structure, quantum density of states of CNTs with imperfections, and electronic transmittals. Each of these can be divided into groups of triplets, specifically those that exhibit comparable characteristics to one another, such as Semiconductor_Semiconductor IJs (SC_SC IJs) (in arrangements of first, second, fifth and eight), Metal_Metal IJs (in arrangements of third and seventh) and Semiconductor_Metal IJs (in arrangements of fourth and sixth). The quantum density of states of SC_SC IJs results in semiconductors with the same order as before, but with a reduced band gap as compared to the primary standards. Additionally, a resized image of quantum density of states is provided to demonstrate the specifics of the divergence near the Fermi limit. quantum density of states for CNTs-IJs (fifth, fourth) – (fifth, fourth) (SC_SC) estimated across a handful of rings at the intersection indicated by the blue lines is shown through the illustration. The hexagonal-assembly of CNTs contains pentagons & heptagon-paired imperfections, which can alter CNTs’ helicity and their basic electronic framework. The red lines indicate the quantum density of states of Perfect-CNTs with indices (fifth, fourth). Despite being semiconductors by nature, Perfect-CNTs (fifth, fourth) exhibit a band gap around 1.22 eV. The semiconductor Perfect-CNTs with indices (seventh, fourth) have a quantum density of states that is mirrored around the Fermi limit (E = 0). Additionally, at the Fermi limit, it has a value that does not equal zero, along with a difference in particle energy. The picture shows that the behavior of CNTs-IJs quantum density of states changes from being purely semiconductor-like to becoming less like a semiconductor when mixed with metallic CNTs at the intersection. The combination of metal and semiconductor is tangible. It changes from one system to another, beginning as a semiconductor and changing into a semiconductor with a considerable number of switching operations. The observation shows that the semiconductor with the indices (seventh, third) and the metal carbon nanotubes with the indices (seventh, fourth) both have zero QDS at the Fermi energy level. Despite being diluted within a few atomic rings, the quantum density of states in the case of CNTs-IJs (seventh, third) – (seventh, fourth) remains at 0.0 at the Fermi energy level due to being diluted within a few atomic rings.

Synthesis of impregnants for dispenser cathodes via homogeneous-lyophilization: Phase structure, optical response and emission property of four aluminates

Dispenser cathodes are the most widely used electron emission source in vacuum electron devices. The impregnant is the source for producing active substances in the dispenser cathodes, which play an irreplaceable role. However, impregnants’ phase structure and optical response properties have yet to be systematically investigated. Herein, four aluminates were prepared as impregnants via homogeneous-lyophilization followed by calcination. Due to the unique preparation process, the elemental distribution of aluminates is exceptionally uniform. Based on the first-principles DFT calculations, the primary phases of the two aluminates 532 and 411 were confirmed to be (Ba0.61Ca0.39)3Al2O6 (P213) and (Ba0.75Ca0.25)4Al2O7 (Cmca). At the same time, α-Ba2ScAlO5 and β-Ba2ScAlO5 are the only phases of aluminates 411-0.75Sc and 411-1.25Sc, respectively. XPS confirmed two chemical states of Ba and Sc in the aluminates. FT-IR and 27Al NMR indicate that the aluminum-oxygen skeleton in all aluminates exists mainly as [AlO4] tetrahedrons, accompanied by a small amount of distorted [AlOx] (x = 5, 6) polyhedrons. The UV–visible light absorption capacity, band gap and intra-structural electron transfer capacity of all aluminates are determined by UV–Vis DRS and PL spectra. The dispenser cathodes impregnated with aluminates 532 and 411 have zero-field current densities of 5.3 A/cm2 and 14.3 A/cm2 at 1100°Cb, respectively. The dispenser cathodes impregnated with aluminate containing scandium have different space-charge-limited current densities, i.e., 29.48 A/cm2 for 411-0.75Sc and 13.66 A/cm2 for 411-1.25Sc at 1000°Cb. This work will provide more options for synthesizing and applying impregnants.

SKIN TONE AND GENDER INFLUENCE SUICIDAL BEHAVIOR OF BRAZILIANS: A CORRESPONDENCE ANALYSIS USING THE CAINTERTOOLS PACKAGE

Suicide is a multidetermined biopsychosocial phenomenon that involves the subjectivity and the environment experienced by individuals. The study aimed to analyze the correspondence between gender and race in the Brazilian regions in 2020 about suicide. A descriptive, quantitative study was carried out, based on the collection of the DATASUS database, in October 2022. Multivariate dimension reduction techniques were used, together with correspondence analysis and cluster analysis, in the rows representing the 27 states of the federation and the types of races as column variables. In the Southeast, the highest suicide rate is for the brown and black races, especially SP, RJ, and PR. We observed the association of indigenous suicide in the state of AM. In CO, there was also variability in the yellow race. The lowest rates were in AP, ES, and RR. The Northeast region had the lowest suicide rates by race. The indigenous race has a weak correlation with the other races. In the states of SC, RS, SP, and PR, suicides by race are associated with the white race. Thus, the number of suicides in Brazilian states is associated with race, color, and gender.

The Process Mineralogical Characterization of Bayan Obo Rare-Earth Tailings and Density Functional Theory Study of the Occurrence State of Sc

As Bayan Obo rare-earth tailings, which are generated after the production of mineral products with the raw ore from different mining areas, are considered secondary resources rich in valuable elements such as F, Fe, REE, and Nb, an effective method is urgently needed to recover such valuable elements for resource recycling and environmental conservation. A mineralogical analysis can enable process diagnosis, design, and optimization and is the key to comprehensively utilizing valuable elements. Hence, detailed mineralogical characterization is necessary as a starting point to develop a feasible processing flowsheet. In this study, various detection methods, namely inductively coupled plasma-optical emission spectrometry (ICP), X-ray Fluorescence Spectrometer (XRF), X-ray powder diffractometer (XRD), scanning electron microscopy system with an energy dispersive spectrometer (SEM-EDS), mineral liberation analysis (MLA), and electron probe microanalysis (EPMA), were applied to conduct detailed mineralogical characterization of Bayan Obo rare-earth tailings, and the occurrence state of Sc in the main Sc-bearing minerals was studied using density functional theory (DFT). The results showed that Fe mainly occurs in hematite, riebeckite, ankerite, siderite, and pyrite, with contents of 50.15 wt%, 27.94 wt%, 8.34 wt%, 4.92 wt%, and 5.59 wt%, respectively. Nearly all F occurs in 26.8 wt% fluorite. The main rare-earth minerals are bastnasite, apatite, and monazite (La), with contents of 5.0%, 5.0%, and 1.6% in Bayan Obo rare-earth tailings, respectively. Notably, 48.47%, 21.70%, 10.34%, and 10.28% of niobium element occurs in nioboaeschynite, pyrochlore, dingdaohengite, and ilmenorutile, respectively. Scandium was detected in five minerals, namely aegirine, riebeckite, monazite, ilmenorutile, and niobite, with average contents of 0.04 wt%, 0.22 wt%, 0.06 wt%, 0.06 wt%, and 1.58 wt%, respectively. According to the DFT analysis, the state of Sc in aegirine is different from that in riebeckite. Scandium in aegirine mainly substitutes Fe or enters the interstitial lattice site, while Sc in riebeckite tends to replace Fe. Based on these results, a process for recovering valuable elements from tailings is proposed.

Strengthening Organisational Resilience Through Knowledge Management: The Santa Catarina´s Civil Defense Case

The constant changes in the political, social, and economic scenarios, as well as recent major crises and natural disasters that have affected Santa Catarina, Brazil, and the world, have increased the demand for organisations to provide more resilient responses. Civil Defence organisations are no exception, and they must prioritise the identification and management of critical knowledge to enhance their organisational resilience. In light of this, a case study was carried out in Santa Catarina´s Civil Defence (SCCD), a public government organisation that plays a critical role in the territorial resilience of SC state. The study aimed to evaluate SCCD’s organisational resilience and develop a continuous improvement plan based on critical knowledge. To achieve this, the Resilience Analysis Grid (RAG) was used as a tool to characterise the SCCD’s resilience potential. The analysis showed that the organisation has an appropriate level of resilience potential. However, to identify ways to enhance this potential, it was necessary to analyse critical knowledge for monitoring, anticipating and responding to unexpected events, as well as exploring how SCCD promotes learning in the face of new situations. To do so, a framework was used to analyse critical knowledge to organisational resilience capabilities. This framework was used to present an improvement plan for the organisation's resilience potential, based on the use of techniques and methods for knowledge management. The plan recommended several practical steps that could be taken to enhance the resilience of the SCCD, including the creation of a knowledge management system, the development of training programmes, and the identification and management of critical knowledge. In conclusion, the study highlighted the importance of critical knowledge in enhancing organisational resilience and demonstrated that a continuous improvement plan based on critical knowledge could lead to significant improvements in the resilience of organisations like the SCCD. By following the study's recommendations, organisations can become better equipped to respond to future challenges and maintain their resilience in the face of change and uncertainty.

Workplace Violence Emergency Nursing Review Questions: May 2023

These review questions are based on the Emergency Nursing Core Curriculum and other pertinent resources to emergency nursing practice. They offer emergency nurses an opportunity to test their knowledge about their practice. Benjamin E. Marett is a Past President of ENA from South Carolina, SC State Council, SC. Dan Nadworny is a member Massachusetts State Council, MA. Kathy Robinson is an ENA Past President and Pennsylvania State Council, PA. Wendy Allen-Thompson is New York State Council, NY.

Energy Transfer Processes in NASICON-Type Phosphates under Synchrotron Radiation Excitation

The luminescence properties of NASICON-type Na3.6M1.8(PO4)3 (M = Y, Lu) and Na3Sc2(PO4)3 phosphates, undoped and rare earth-doped (RE = Tb3+, Dy3+, Eu3+, Ce3+), were studied using synchrotron radiation in a wide energy region of 4.5–45 eV. Intrinsic emission originating from self-trapped excitons with electron component localized at the 3d Sc states was detected in both doped and undoped Na3Sc2(PO4)3 while only defect-related emission was registered in Na3.6M1.8(PO4)3. Emission of RE ions substituting three-valent cations in low-symmetry sites was detected in all doped phosphates. The efficiency and pass ways of energy transfer from the host to emission centres were analysed based on luminescence excitation spectra. It is shown that the most efficient energy transfer is realized in Tb3+-doped phosphors, while it was poor for other RE ions. The differences in energy transfer efficiencies are explained by different position of RE f states in the crystal electronic band structure influencing the efficiency of charge carrier trapping in the substance. Based on excitation spectra analysis, the bandgap values were estimated to ~8 eV for all studied phosphates.

Electron affinity of atomic scandium and yttrium and excited states of their negative ions.

The latest experimental electron affinity (EA) values of atomic scandium and yttrium were 0.189(20) and 0.308(12) eV as reported by Feigerle et al. in 1981. The measurement accuracy of these was far lower than that of other transition elements, and no conclusive result had been made on the excited states of their negative ions. In the current work, we report more accurate EA values of Sc and Y and the electronic structure of their negative ions using the slow-electron velocity-map imaging method. The EA values of Sc and Y are determined to be 0.179 378(22) and 0.311 29(22) eV, respectively. The ground state of Sc- is identified as 3d4s24p 1D2, and the ground state is 4d5s25p 1D2 for Y-. Furthermore, several excited states of Sc- and Y- are observed: Sc- (3D1) and Y- (3D1, 3D2, 3D3, 3F2, and 3F3), and their energy levels are determined to be 1131.8(28), 1210.0(13), 1362.3(30), 1467.7(26), 1747(16), and 1987(33) cm-1, respectively.

«Eastern Partnership» project: current problems and development prospects

The issues of developing the Eastern Partnership, created on the initiative of the European Union to develop integration ties with the countries of the post-Soviet space, were considered. The article analyzes the eastern dimension of European Neighborhood Policy – the Eastern Partnership (SC) based on official government documents and expert assessments. The CCS mainly refers to socio-economic cooperation. The initiative will involve EU member states and six Eastern European partner countries – Azerbaijan, Armenia, Belarus, Georgia, Moldova and Ukraine. The Eastern Partnership is aimed at the conclusion of association agreements by the countries of the post-Soviet space with the EU. The cooperation program included the states of Eastern Europe and Transcaucasia. Cooperation within the framework of the Eastern Partnership is aimed at such priority areas as economic development, strengthening of management institutions; development of contacts in the energy sector, expansion of contacts between people. In relations with partner countries, the EU looks at each individual country from the perspective of a differentiated approach policy. The main tasks of the SC are the rapprochement and deepening of cooperation between the states of Eastern Europe and the South Caucasus with the European Union, the creation of conditions for the further promotion of political community and economic integration both between the EU and the SC States and between the Rs States. The article analyzes the current stage of development of the» Eastern Partnership « and the main results of the participation of these states in the program.

Random-anisotropy mixed-spin Ising on a triangular lattice

We have studied the mixed spin-1/2 and 1 Ising ferrimagnetic system with a random anisotropy on a triangular lattice with three interpenetrating sublattices A, B, and C. The spins on the sublattices are represented by σA (states ±1/2), σB (states ±1/2), and SC (states ±1, 0). We have performed Monte Carlo simulations to obtain the phase diagram temperature kBT/|J| versus the strength of the random anisotropy D/|J|. The phase boundary between two ferrimagnetic FR1 and FR2 phases at lower temperatures are always first-order for p < 0.25 and second-order phase transition between the FR1, FR2 and the paramagnetic P phases. On the other hand, for values of p ⪆ 0.5, the phase diagram presents only second-order phase transition lines.

The Challenges of Emergency Online Instruction at a Small HBCU

In Spring 2020, South Carolina State University, like most institutions of higher learning across the United States, faced a sudden transition to remote instruction due to the global pandemic, a transformation that affected instruction methods throughout 2020-2021. This paper discusses how the Department of English and Communications (EAC) at SC State addressed this abrupt paradigm shift and what lessons were learned. The sudden switch to remote teaching methods imposed an acceleration of group dynamics in a department most comfortable with the Kurt Lewin Model of Change. Nevertheless, the department faculty evolved into a unit with a greater understanding of their abilities and of student needs.

Correction of residual errors in configuration interaction electronic structure calculations.

Methods for correcting residual energy errors of configuration interaction (CI) calculations of molecules and other electronic systems are discussed based on the assumption that the energy defect can be mapped onto atomic regions. The methods do not consider the detailed nature of excitations but instead define a defect energy per electron that is unique to a specific atom. Defect energy contributions are determined from calculations on diatomic and hydride molecules and then applied to other systems. Calculated energies are compared with experimental thermodynamic and spectroscopic data for a set of 41 mainly organic molecules representing a wide range of bonding environments. The most stringent test is based on a severely truncated virtual space in which higher spherical harmonic basis functions are removed. The errors of the initial CI calculations are large, but in each case, including defect corrections brings calculated CI energies into agreement with experimental values. The method is also applied to a NIST compilation of coupled cluster calculations that employ a larger basis set and no truncation of the virtual space. The corrections show excellent consistency with total energies in very good agreement with experimental values. An extension of the method is applied to dmsn states of Sc, Ti, V, Mn, Cr, Fe, Co, Ni, and Cu, significantly improving the agreement of calculated transition energies with spectroscopic values.

Effect of Doping on Rutile TiO2 Surface Stability and Crystal Shapes.

Transition‐metal‐(TM‐)doped TiO2 has been considered as promising electrode material for the oxygen evolution reaction (OER). OER activity is expected to depend on the coordination of the surface atoms. In this study, we theoretically investigate the stability of low‐index surfaces of TM‐doped rutile, (110), (100), (101) and (001), with 50 % of the Ti atoms substituted by Sc, Y, V, Nb or Ta. For Sc and Y, we also consider models with O vacancies providing the most stable oxidation state of Sc and Y. Surface energies are calculated with DFT(+U). Based on the Gibbs‐Wulff theorem, the shape of the single crystals is predicted. It is observed that p‐doping leads to spontaneous oxygen loss and O vacancies cause surface reconstruction. The Wulff shapes of n‐doped TiO2 have smaller contributions of the (110) facet and, for Nb and Ta, larger contributions of other facets. Given the higher coordinative unsaturation of the TM atoms in the latter, a higher catalytic activity is expected.

Multiferroic van der Waals heterostructure FeCl2/Sc2CO2 : Nonvolatile electrically switchable electronic and spintronic properties

Multiferroic van der Waals (vdW) heterostrucutres offers an exciting route towards novel nanoelectronics and spintronics device technology. Here we investigate the electronic and transport properties of multiferroic vdW heterostructure composed of ferromagnetic FeCl$_2$ monolayer and ferroelectric Sc$_2$CO$_2$ monolayer using first-principles density functional theory and quantum transport simulations. We show that FeCl$_2$/Sc$_2$CO$_2$ heterostructure can be reversibly switched from semiconducting to half-metallic behavior by electrically modulating the ferroelectric polarization states of Sc$_2$CO$_2$. Intriguingly, the half-metallic phase exhibits a Type-III broken gap band alignment, which can be beneficial for tunnelling field-effect transistor application. We perform a quantum transport simulation, based on a \emph{proof-of-concept} two-terminal nanodevice, to demonstrate all-electric-controlled valving effects uniquely enabled by the nonvolatile ferroelectric switching of the heterostructure. These findings unravels the potential of FeCl$_2$/Sc$_2$CO$_2$ vdW heterostructures as a building block for designing a next generation of ultimately compact information processing, data storage and spintronics devices.

Benchmark PhotoIonization Cross-Sections of Neutral Scandium from the Ground and Excited States

The B-spline R-matrix method has been used to investigate cross-sections for photoionization of neutral scandium from the ground and excited states in the energy region from the 3d and 4s valence electron ionization thresholds to 25 eV. The initial bound states of Sc and the final residual Sc+ ionic states have been accurately calculated by combining the multiconfiguration Hartree-Fock method with the frozen-core close-coupling approach. The lowest 20 bound states of Sc I belonging to the ground 3d4s2 and excited 3d24s, 3d24p, 3d4s4p, 4s24p, and 3d3 configurations have been considered as initial states. The 81 LS final ionic states of Sc+ belonging to the terms of 3p63d2, 3p63d4l (l = 0–3), 3p63d5l (l = 0–3), 3p63d6s, 3p64s2, 3p64s4l (l = 0–3), 3p64s5l (l = 0–1), and 3p64p2 configurations have been included in the final-state close-coupling expansion. The cross-sections are dominated by complicated resonance structures in the low energy region converging to several Sc+ ionic thresholds. The inclusion of all these final ionic states has been noted to significantly impact the near-threshold resonance structures and background cross-sections. The important scattering channels for leaving the residual ion in various final states have been identified, and the 3d electron ionization channels have been noted to dominate the cross-sections at higher photon energies.

Assessment of phytotoxicity and impact on the enzymatic activity of soil microorganisms caused by veterinary antibiotics used in Brazilian farms

This work aimed to evaluate the impact of veterinary antibiotics on biomass phytoproductivity and soil enzyme activity. The soil was sampled in the city of Camboriú (state of SC, Brazil). The soil enzyme activity was assessed through hydrolysis of fluorescein diacetate (FDA), while phytotoxicity was tested using Lactuca sativa (lettuce). Results showed that the most appropriate exposure time to assess the impact of antibiotics on soil microbiology was 24 h, while the incubation time of 3 h was the most appropriate for FDA hydrolysis. Ampicillin and Amoxicillin at the tested concentrations did not interfere with the enzyme activity of the soil microbiota, while Oxytetracycline and Neomycin showed a significant reduction in soil enzyme activity. For the dry and wet biomass of lettuce, 2% Colistin and 1% Ampicillin were the treatments that reduced lettuce biomass. Hence, the use of excessive antibiotics in animal production may lead to environmental impacts and, in the future, to public health problems.

Theoretical investigation on 5–fluorouracil anti–cancer drug adsorption on Sc– and Ti–doped armchair and zigzag boron nitride nanotubes

The application of nanomaterials as a drug delivery system for anticancer is now becoming an important for control drug release near the tumor cell. Herein, the adsorption properties of 5–fluorouracil (5FU) drug on pristine armchair and zigzag single wall boron nitride nanotubes (BNNT) and their doping with Sc or Ti atom in gas phase and water solution conditions were investigated through density functional theory calculations. The interactions of 5FU molecule and BNNTs on the geometrical stabilities, adsorption abilities and electronic properties were also determined and discussed. The calculations reveal that there are shorter adsorption distance, higher adsorption ability, higher solubilities, and larger charge transfer when 5FU molecule is adsorbed on Sc– and Ti–doped BNNTs in comparison with adsorptions on pristine BNNT. According to the results, the doping of transition metal atom is improved the reactivity of BNNTs toward 5FU molecule. Thermodynamic analyses demonstrate that interactions between 5FU molecule and Sc– and Ti–doped BNNTs are exothermic and spontaneous processes. The recovery time is attained to be 272.63 s for the 5FU desorption from the Ti doping on N site of armchair BNNT. The electronic properties reveal that after 5FU adsorption, the energy gap and density of state of Sc– and Ti–doped BNNTs are clearly changed than that of pristine BNNT, which suggests that Sc and Ti doping is improved the sensitivity of BNNTs to 5FU molecule. Therefore, Sc– and Ti–doped BNNTs can be a good candidate for sensors or catalyst to adsorb and detect 5FU molecule for drug delivery system in the nanomedicine domain.

Superconducting dome with extended s -wave pairing symmetry in the heavily hole-overdoped copper-oxide planes

We analyze the two-orbital (with $d_{x^2-y^2}$ and $d_{3z^2-r^2}$ orbitals) analogue of the $t$-$J$-$U$ model as applied to the description of the copper-oxide monolayer deposited on the Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ substrate (CuO$_2$/BSCCO). We show, that an $extended$ $s$-$wave$ superconducting dome appears in the heavily hole overdoped regime of the model, with dominant contribution to the pairing coming from the $d_{3z^2-r^2}$ orbitals. Also, the lower critical doping for the appearance of the SC state concurs with the Lifshitz Transition after which the hole-like Fermi pockets are created around the $M$ points in the Brillouin zone. The obtained results are in accord with the recent experimental result [cf. Y. Zhong et al., Sci. Bull. 61, 1239 (2016)]. An analogous two-band description is also analyzed in the context of the Ba$_2$CuO$_{4-y}$ bulk compound, where the heavily hole-overdoped situation is believed to be reached [cf. W. M. Li et al. PNAS 116, 12156 (2019)]. As we show, a two dome structure can be realized in such system with the $d$- and $s$-$wave$ symmetries of the gap corresponding to the low hole-doping and heavily hole overdoped cases, respectively.

High-Risk Opioid Prescribing Trends: Prescription Drug Monitoring Program Data From 2010 to 2018.

Deaths due to opioids have continued to increase in South Carolina, with 816 opioid-involved overdose deaths reported in 2018, a 9% increase from the prior year. The objective of the current study is to examine longitudinal trends (quarter [Q] 1 2010 through Q4 2018) of opioid prescribing volume and high-risk opioid prescribing behaviors in South Carolina using comprehensive dispensing data available in the South Carolina Prescription Drug Monitoring Program (SC PDMP). Retrospective analyses of SC PDMP data were performed using general linear models to assess quarterly time trends and change in rate of each outcome Q1 2010 through Q4 2018. Opioid analgesic prescription fills from SC state residents between Q1 2010 and Q4 2018. High-risk prescribing behaviors included (1) opioid prescribing rate; (2) percentage of patients receiving opioids dispensed 90 or more average morphine milligram equivalents daily; (3) percentage of opioid prescribed days with overlapping opioid and benzodiazepine prescriptions; (4) rate per 100 000 residents of multiple provider episodes; and (5) percentage of patients prescribed extended release opioids who were opioid naive. A total of 33 027 461 opioid prescriptions were filled by SC state residents within the time period of Q1 2010 through Q4 2018. A 41% decrease in the quarterly prescribing rate of opioids occurred from Q1 2010 to Q4 2018. The decrease in overall opioid prescribing was mirrored by significant decreases in all 4 high-risk prescribing behaviors. PDMPs may represent the most complete data regarding the dispensing of opioid prescriptions and as such be valuable tools to inform and monitor the supply of licit opioids. Our results indicate that public health policy, legislative action, and multiple clinical interventions aimed at reducing high rates of opioid prescribing across the health care ecosystem appear to be succeeding in the state of South Carolina.

Glutamine Metabolism Controls Stem Cell Fate Reversibility and Long-Term Maintenance in the Hair Follicle

Stem cells reside in specialized niches that are critical for their function. Upon activation, hair follicle stem cells (HFSCs) exit their niche to generate the outer root sheath (ORS), but a subset of ORS progeny returns to the niche to resume an SC state. Mechanisms of this fate reversibility are unclear. We show that the ability of ORS cells to return to the SC state requires suppression of a metabolic switch from glycolysis to oxidative phosphorylation and glutamine metabolism that occurs during early HFSC lineage progression. HFSC fate reversibility and glutamine metabolism are regulated by the mammalian target of rapamycin complex 2 (mTORC2)-Akt signaling axis within the niche. Deletion of mTORC2 results in a failure to re-establish the HFSC niche, defective hair follicle regeneration, and compromised long-term maintenance of HFSCs. These findings highlight the importance of spatiotemporal control of SC metabolic states in organ homeostasis.