Compact, low power consumption methane sensor based on a novel miniature multipass gas cell and a CW, room temperature interband cascade laser emitting at 3.3 μm

Abstract Spin-orbit electronics (spin-orbitronics) has been widely discussed for enabling nonvolatile devices that store and process information with low power consumption. The potential of spin-orbitronics for memory and logic applications has been demonstrated by perpendicular anisotropy magnetic devices comprised of heavy-metal/ferromagnet or topological-insulator/ferromagnet bilayers, where the heavy metal or topological insulator provides an efficient source of spin current for manipulating information encoded in the bistable magnetization state of the ferromagnet. However, to reliably switch at room temperature, spin-orbit devices should be large to reduce thermal fluctuations, thereby compromising scalability, which in turn drastically increases power dissipation and degrades performance. Here, we show that the scalability is not a fundamental limitation in spin-orbitronics, and by investigating the interactions between the geometry of the ferromagnetic layer and components of the spin-orbit torque, we derive design rules that lead to deeply scalable spin-orbit devices. Furthermore, employing experimentally verified models, we propose deeply scaled spin-orbit devices exhibiting high-speed deterministic switching at room temperature. The proposed design principles are essential for design and implementation of very-large-scale-integration (VLSI) systems that provide high performance operation with low power consumption.

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Active Nanostructures at Interfaces for Photocatalytic Reactors and Low-power Consumption Sensors

MRS Proceedings ◽

10.1557/proc-1257-o09-04 ◽

2010 ◽

Vol 1257 ◽

Cited By ~ 3

Author(s):

James L Gole ◽

Serdar Ozdemir ◽

Sharka M Prokes ◽

David M Dixon

Keyword(s):

Power Consumption ◽

Low Power ◽

Metal Ions ◽

Metal Ion ◽

Room Temperature ◽

Transition Metal Ions ◽

Low Power Consumption ◽

Temperature Phase ◽

Photocatalytic Reactors ◽

Nanostructured Metal Oxides

AbstractActive nanostructures which provide unique transformations are being introduced to phase matched porous silicon (PS) nano/micropores to form a platform for low power consumption highly selective sensors and microreactors. TiO2-xNx photocatalysts have been formed in seconds at room temperature at the nanoscale via the direct nitration of anatase TiO2 nanocolloids. Tunability throughout the visible depends upon the degree of agglomeration and the ability to seed these nanoparticles with metal ions. Co metal ion seeding leads to the efficient room temperature phase transformation, of anatase to rutile TiO2, where normally much higher temperatures are required. Seeding of a properly nitridated TiO2 nanocolloid with transition metal ions (Co, Ni) allows for the enhancement of the infrared spectra of the TiO2-xNx nitridated titania surface in excess of 10-fold, providing a means to analyze for minor contaminants and intermediates. Evidence for nitrogen fixation is found in Fe treated systems. The TiO2-xNx systems act as visible light absorbing photocatalyts. These photocatalysts and additional nanostructured metal oxides can be placed on the surface of PS-based sensor and microreactor configurations to greatly improve the interface response.

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Structure, Performance, and Application of BiFeO3 Nanomaterials

Nano-Micro Letters ◽

10.1007/s40820-020-00420-6 ◽

2020 ◽

Vol 12 (1) ◽

Cited By ~ 2

Author(s):

Nan Wang ◽

Xudong Luo ◽

Lu Han ◽

Zhiqiang Zhang ◽

Renyun Zhang ◽

...

Keyword(s):

Power Consumption ◽

Low Power ◽

Room Temperature ◽

Bismuth Ferrite ◽

Ferroelectric Properties ◽

Environmentally Friendly ◽

Low Power Consumption ◽

Broad Application ◽

The Future ◽

Potential Applications

AbstractMultiferroic nanomaterials have attracted great interest due to simultaneous two or more properties such as ferroelectricity, ferromagnetism, and ferroelasticity, which can promise a broad application in multifunctional, low-power consumption, environmentally friendly devices. Bismuth ferrite (BiFeO3, BFO) exhibits both (anti)ferromagnetic and ferroelectric properties at room temperature. Thus, it has played an increasingly important role in multiferroic system. In this review, we systematically discussed the developments of BFO nanomaterials including morphology, structures, properties, and potential applications in multiferroic devices with novel functions. Even the opportunities and challenges were all analyzed and summarized. We hope this review can act as an updating and encourage more researchers to push on the development of BFO nanomaterials in the future.

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An ultra-sensitive gas sensor based on two-dimensional manganese porphyrin monolayer

Physical Chemistry Chemical Physics ◽

10.1039/d1cp00747e ◽

2021 ◽

Author(s):

Ze-Wen Hao ◽

Mi-Mi Dong ◽

Rui Qin Zhang ◽

Chuankui Wang ◽

Xiaoxiao Fu

Keyword(s):

Power Consumption ◽

Low Power ◽

Room Temperature ◽

Gas Sensing ◽

Environmental Safety ◽

Low Power Consumption ◽

Two Dimensional ◽

Manganese Porphyrin ◽

Highly Sensitive ◽

Important Solution

The development of highly sensitive, low-power consumption, stable and recyclable gas sensing devices at room temperature has become an important solution for the environmental safety detection. Utilizing two-dimensional metalloporphyrin monolayer...

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Optimal design of a high homogeneous and small-size shim coil for atomic spin gyroscope based on 0-1 linear programming

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209319 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 165-172

Author(s):

Dongge Deng ◽

Mingzhi Zhu ◽

Qiang Shu ◽

Baoxu Wang ◽

Fei Yang

Keyword(s):

Linear Programming ◽

Power Consumption ◽

Low Power ◽

Optimization Design ◽

Structural Parameters ◽

Axial Position ◽

Low Power Consumption ◽

Optimal Method ◽

Atomic Spin ◽

Shim Coil

It is necessary to develop a high homogeneous, low power consumption, high frequency and small-size shim coil for high precision and low-cost atomic spin gyroscope (ASG). To provide the shim coil, a multi-objective optimization design method is proposed. All structural parameters including the wire diameter are optimized. In addition to the homogeneity, the size of optimized coil, especially the axial position and winding number, is restricted to develop the small-size shim coil with low power consumption. The 0-1 linear programming is adopted in the optimal model to conveniently describe winding distributions. The branch and bound algorithm is used to solve this model. Theoretical optimization results show that the homogeneity of the optimized shim coil is several orders of magnitudes better than the same-size solenoid. A simulation experiment is also conducted. Experimental results show that optimization results are verified, and power consumption of the optimized coil is about half of the solenoid when providing the same uniform magnetic field. This indicates that the proposed optimal method is feasible to develop shim coil for ASG.

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