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

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3];  [4];  [4];  [4]; ORCiD logo [2]; ORCiD logo [2];  [5]; ORCiD logo [5]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [4] more »; ORCiD logo [4]; ORCiD logo [2] « less
  1. Univ. of Illinois at Urbana, IL (United States); Hefei Univ. of Technology (China); DOE/OSTI
  2. Univ. of Illinois at Urbana, IL (United States)
  3. Stanford Univ., CA (United States); Univ. of Twente, Enschede (Netherlands)
  4. Stanford Univ., CA (United States)
  5. Hefei Univ. of Technology (China)

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/mm2 and 23 μH/mm3, respectively. The simulated intensity of the magnetic induction reaches tens of mtesla in fabricated devices at 10 MHz.

Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); National Science Foundation Engineering Research Center for Power Optimization of Electro-Thermal Systems (POETS); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-07ER46471
OSTI ID:
1626042
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 3 Vol. 6; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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