Engineering topics

Huang, Wen

Publications and source records attributed to Huang, Wen.

3 records

DOE OSTI2021

Rolled-up electromagnetic component for on-chip applications and method of making a rolled-up electromagnetic component

A rolled-up electromagnetic component for on-chip applications comprises: a multilayer sheet in a rolled configuration comprising at least one turn about a longitudinal axis; a core defined by a first turn of the rolled configuration; and a soft magnetic material disposed within the core, where the multilayer sheet comprises a conductive pattern layer on a strain-relieved layer. A method of making a rolled-up electromagnetic component for on-chip applications includes forming a rolled-up device comprising: a multilayer sheet in a rolled configuration having at least one turn about a longitudinal axis, where the multilayer sheet comprises a conductive pattern layer on a strain-relieved layer; and a core defined by a first turn of the rolled configuration. The method further includes introducing a soft magnetic material into the core.

Li, Xiuling↗

DOE OSTI2020

Monolithic mtesla-level magnetic induction by self-rolled-up membrane technology

Monolithic strong magnetic induction at the mtesla to tesla level provides essential functionalities to physical, chemical, and medical systems. Current design options are constrained by existing capabilities in three-dimensional (3D) structure construction, current handling, and magnetic material integration. We report here geometric transformation of large-area and relatively thick (~100 to 250 nm) 2D nanomembranes into multiturn 3D air-core microtubes by a vapor-phase self-rolled-up membrane (S-RuM) nanotechnology, combined with postrolling integration of ferrofluid magnetic materials by capillary force. Hundreds of S-RuM power inductors on sapphire are designed and tested, with maximum operating frequency exceeding 500 MHz. An inductance of 1.24 μH at 10 kHz has been achieved for a single microtube inductor, with corresponding areal and volumetric inductance densities of 3 μH/mm 2 and 23 μH/mm 3 , respectively. The simulated intensity of the magnetic induction reaches tens of mtesla in fabricated devices at 10 MHz.

42 ENGINEERING↗

NASA NTRS2010

Progress in Measurement of Carbon Dioxide Using a Broadband LIDAR

Innovative active system using advanced source technology development will enable precise daytime or nighttime measurements of column CO2. Directly responds to NRC DS ASCENDS mission. Number of lasers is reduced compared to competing technologies which reduces the complexity of sensor and thus the cost and risk of failure. Knowledge gained from previously developed passive sensor decreases the risk and cost of the present lidar system development. The instrument can play a significant role as an intercomparison instrument for OCO (Orbiting Carbon Observatory) if it is rebuilt and launched as well as other laser based instruments under development for participation in ASCENDS. It can play a role as an airborne instrument in its own right in addressing the problems of scale arising from differences between point observations by the existing ground based CO2 network and wider area measurements obtained by satellites. Developed 2.0 micron broadband system as well and will compare performance of both systems to choose optimal approach for ASCENDS. Have begun development of approach that uses array detectors instead of APD. This approach will have lower noise than APD and may simplify design of the detector optical train.

Heaps, William S.↗