an array of rolled up nanomembranes


Nanomaterials design

9 Nov 2018

Rolled‐up self‐assembly of compact inductors and transformers

D. D. Karnaushenko, D. Karnaushenko, H.‐J. Grafe, V. Kataev, B. Büchner, O. G. Schmidt

Adv. Electron. Mater. 4, 1800298 (2018)

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9 Apr 2018

Manipulating photon−plasmon coupling in microtube cavities

In situ generation of silver nanoparticles for selective coupling between localized plasmonic resonances and whispering-gallery modes is demonstrated by spatially resolved laser dewetting on microtube surfaces.

ACS Nano 12, 3726 (2018)

3 Aug 2017

Thermal conductivity in radial and planar Si/SiOx hybrid superlattices

Thermal conductivities through radial and planar Si/SiOx hybrid superlattices are substantially reduced -- putting forth a novel efficient way of managing phonon transport in Si-based devices.

ACS Nano 11, 8215 (2017)

24 Jan 2017

Monolithically integrated microtube cavities for optofluidic sensing

Monolithically integrated vertical ring resonators pave the way for optofluidics in three-dimensions on photonic chips.

Opt. Lett. 42, 486 (2017)

30 Aug 2016

Piezo-controlled silicon integrated quantum dot photonics

The single photon emission from a single III-V quantum dot (QD) is tuned into resonance with that of another QD by a fully Si-integrated MEMS platform .

Nano Lett. 16, 5785 (2016)

23 Jun 2016

Plasmon-photon coupling in tubular microcavities

Selective coupling of localized surface plasmons and resonant optical modes is achieved in cleverly patterned microtubular optical cavities. 

Phys. Rev. Lett. 116, 253904 (2016)

18 Feb 2016

Organic nanocrystal diode for room temperature NO2 sensing

Organic diodes consisting of molecular nano-pyramid structures demonstrate high average sensitivity (151% ppm−1) and fast recovery time (12 min) for NO2 detection.

Adv. Mater. 28, 2971 (2016)

	Biomimetic microelectronics for regenerative neuronal cuff implants

Biomimetic microelectronics for regenerative neuronal cuff implants

D. Karnaushenko, N. Münzenrieder, D. D. Karnaushenko, B. Koch, A. K. Meyer, S. Baunack, L. Petti, G. Tröster, D. Makarov, O. G. Schmidt

 Adv. Mater. 27, 6797 (2015)

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	High performance tubular GMI sensors

High performance tubular GMI sensors

Arrays of rolled-up on-chip-integrated giant magneto-impedance (GMI) sensors equipped with pick-up coils are demonstrated.

Adv. Mater. 27, 6582 (2015)

	 All-electric access to the magnetic-field-invariant magnetization of antiferromagnets

All-electric access to the magnetic-field-invariant magnetization of antiferromagnets

We provide new insights into the physics of the fundamentally-appealing magnetoelectric Cr2O3 and application-relevant IrMn antiferromagnets.

Phys. Rev. Lett. 115, 097201 (2015)

	Monolithic integration of vertical optical ring resonators

Monolithic integration of vertical optical ring resonators

We demonstrate full integration of vertical optical ring resonators with silicon nanophotonic waveguides on silicon-on-insulator substrates to accomplish a significant step towards 3D photonic integration.

Opt. Lett. 40, 3826 (2015)

	Ultra-compact helical antennas for smart system implants

Ultra-compact helical antennas for smart system implants

Ultra-compact helical antennas with a total length five times smaller compared to their conventional dipole counterparts are demonstrated to operate in the Industry-Scientific-Medical radio band. 

NPG Asia Mater. 7, e188 (2015)

	Magnetism in Möbius rings

Magnetism in Möbius rings

 We demonstrate that the magnetic Möbius ring is a unique object because it unites two classes of geometrical effects, namely, topologically induced magnetization patterning and curvature induced chirality symmetry breaking.

Phys. Rev. Lett. 114, 197204 (2015)

	Transfer printed stretchable magnetoelectronics

Transfer printed stretchable magnetoelectronics

M. Melzer, D. Karnaushenko, G. Lin, S. Baunack, D. Makarov, O. G. Schmidt

Adv. Mater. 27, 1333 (2015)

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	Thermal conductivity of mechanically joined nanomembrane superlattices

Thermal conductivity of mechanically joined nanomembrane superlattices

Hybrid superlattices consisting of a large number of nanomembranes mechanically stacked on top of each other are fabricated by a roll-up and press-back technique. 

Nano Lett. 14, 2837 (2014)

	Large-area rolled-up nanomembrane capacitor arrays

Large-area rolled-up nanomembrane capacitor arrays

R. Sharma, C. C. Bof Bufon, D. Grimm, R. Sommer, A. Wollatz, J. Schadewald, D. J. Thurmer, P. F. Siles, M. Bauer, O. G. Schmidt

Adv. Energy Mater. 4, 1301631 (2014)

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	Domain patterns of magnetic rolled-up microtubes

Domain patterns of magnetic rolled-up microtubes

Rolled-up magnetic microtubes display spiral-like, longitudinally or azimuthally magnetized domain patterns. 

Adv. Mater. 26, 316 (2014)

	Stretching quantum dots till they become light

Stretching quantum dots till they become light

We demonstrate the creation of a light-hole exciton ground state by applying elastic stress to an initially unstrained quantum dot. 

Nat. Phys. 10, 46 (2014)

	Diamond lattice photonic crystals from rolled-up membranes

Diamond lattice photonic crystals from rolled-up membranes

A novel method for the fabrication of diamond lattice photonic crystals with full band gap by rolling strained pre-patterned titania membranes is proposed.

Phys. Rev. A. 87, 041803 (2013)

	Dynamic molecular processes detected by nanomembrane based microtube cavities

Dynamic molecular processes detected by nanomembrane based microtube cavities

Dynamic molecular processes of water and ethanol are detected on the surface of rolled-up opto-chemical microtube resonators.

Adv. Mater. 25, 2357 (2013)

	Rolled-up field effect transistors

Rolled-up field effect transistors

We fabricate inorganic thin film transistors with bending radii of less than 5μm maintaining their high electronic performance with on-off ratios of more than 100.000 and subthreshold swings of 160mV/dec.

Nano Lett. 13, 213 (2013)

	Self - Elongating Nanowires

Self - Elongating Nanowires

We report the self-assembled growth of Ge nanowires with a height of only 3 unit cells and a length of up to 2 micrometers by means of molecular beam epitaxy.

Phys. Rev. Lett. 109, 085502 (2012)

	Stretchable magnetoelectronics

Stretchable magnetoelectronics

Stretchable magnetoelectronic devices are demonstrated for the first time.

Adv. Mater. 24, 6468 (2012)

Nano Lett. 11, 2522 (2011)

	Magnetically capped rolled-up nanomembranes

Magnetically capped rolled-up nanomembranes

In this work, we address curvature-driven modifications of magnetic properties in confined cylindrically curved magnetic nanomembranes.

Nano Lett. 12, 3961 (2012)

	Printable magnetoelectronics

Printable magnetoelectronics

D. Karnaushenko, D. Makarov, C. Yan, R. Streubel, O. G. Schmidt

Adv. Mater. 24, 4518 (2012)

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	Self-propelled nanotools drilling into cells

Self-propelled nanotools drilling into cells

We design nanoscale tools in the form of autonomous and remotely guided catalytically self-propelled rolled-up tubes.

ACS Nano 6, 1751 (2012)

	Fabrication and applications of large arrays of multifunctional rolled-up SiO/SiO2 microtubes

Fabrication and applications of large arrays of multifunctional rolled-up SiO/SiO2 microtubes

S. M. Harazim, W. Xi, C. K. Schmidt, S. Sanchez, O. G. Schmidt

J. Mater. Chem. 22, 2878 (2012)

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	Tunable generation of correlated vortices in open superconductor tubes

Tunable generation of correlated vortices in open superconductor tubes

We theoretically apply transport currents and magnetic fields to open superconducting tubes.

Nano Lett. 12, 1282 (2012)

	Engineering the properties of Quantum-Light-Emitting Diodes by strain

Engineering the properties of quantum-light-emitting diodes by strain

We present the first nanomembrane quantum-light-emitting diodes (QLEDs) integrated onto piezoelectric actuators. 

Adv. Mater. 24, 2668–2672 (2012)

	Lab-in-a-tube

Lab-in-a-tube

A lab-in-a-tube device comprises numerous ultracompact components in a single tube which can be developed using rolled-up technology.

Lab Chip 12, 1917 (2012)

	Magnetic microhelix coil structures

Magnetic microhelix coil structures

We design and investigate three-dimensional microhelix coil structures that are radial-, corkscrew-, and hollow-bar-magnetized. 

Phys. Rev. Lett. 107, 097204 (2011)

	Hybrid organic/inorganic molecular heterojunctions

Hybrid organic/inorganic molecular heterojunctions

We combine self-assembly and top-down methods to create hybrid junctions consisting of single organic molecular monolayers sandwiched between metal and/or single-crystalline semiconductor nanomembrane based electrodes.

Nano Lett. 11, 3727 (2011)

	Cardboard rolls on the nanoscale

Cardboard rolls on the nanoscale

We have exploited the card-board effect on the nanoscale to define the roll-up direction of ultra-thin membranes on a substrate surface.

Nano Lett. 11, 236 (2011)

	Tubular optofluidic sensors for enhanced refractive index sensing

Tubular optofluidic sensors for enhanced refractive index sensing

Optofluidic microcavities from rolled-up ring resonators with subwavelength wall thicknesses are fabricated with excellent sensing function.

ACS Nano 4, 3123 (2010)

	Rolled-up nanotech for lithium energy storage devices

Rolled-up nanotech for lithium energy storage devices

H.‐X. Ji, X.‐L. Wu, L.‐Z. Fan, C. Krien, I. Fiering, Y.‐G. Guo, Y. Mei, O. G. Schmidt

Adv. Mater. 22, 4591 (2010)

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	Self-wound ultra-compact energy storage elements

Self-wound ultra-compact energy storage elements

We demonstrate the self-assembly of ultra-compact energy storage devices based on self-wound three-dimensional hybrid organic/inorganic nanomembranes. 

Nano Lett. 10, 2506 (2010)

	First Swiss roll micro-supercapacitor

First Swiss roll micro-supercapacitor

We demonstrate a redox Swiss roll micro-supercapacitor consisting of a self-rolled multilayered nanomembrane with an electrochemical active layer at either the outer or inner surface for different proton diffusion paths.

Chem. Commun. 46, 3881 (2010)

	Neuron cells cultured in rolled-up microtubes

Neuron cells cultured in rolled-up microtubes

Primary mouse motor neurons and immortalised CAD cells, a cell line derived from the central nervous system, can be well cultured on arrays of rolled-up microtubes.

Adv. Eng. Mater. 12, B558 (2010)

	How nanostructures healthily cope with stress...

How nanostructures healthily cope with stress...

 Quantum dots are able to cope with increasing stress by cyclically incorporating large amounts of material from the substrate and corresponding changes of their shape.

Phys. Rev. Lett. 105, 166102 (2010)

	Lateral Si quantum dot molecules

Lateral Si quantum dot molecules

J. Dong, T. Zhang, Y. Zhang, L. Yang, R. Lu

Appl. Phys. Lett. 96, 193101 (2010)

	The DotFET becomes reality

The DotFET becomes reality

On May 18, 2001 a patent to speed up Si transistors was filed by Schmidt and Eberl (US 6,498,359), which relies on a SiGe dot positioned below the channel of a Si transistor. This idea was now realized.

IEEE Electron Device Lett. 31, 1083 (2010)

	Rolled-up mesoscopic Josephson junctions

Rolled-up mesoscopic Josephson junctions

Mesoscopic Josephson junctions are developed simply relying on natural metallic film roughnesses, self-assembly and standard optical lithography.

Nano Lett. 10, 3704 (2010)

	Photovoltaic effect in ultrathin Si nanomembranes

Photovoltaic effect in ultrathin Si nanomembranes

Under local illumination, ultrathin silicon nanomembranes on insulator reveal a gate-controlled photovoltaic effect and negative transconductance in Schottky transistors applying both homo- and hetero-contacts.

Adv. Mater. 22, 3667 (2010)

	Stretch graphene, get more details...

Stretch graphene, get more details...

We are continuously expanding the knowledge of how controllable external stresses, as a basic physical technique, modify the properties and unveil interesting physics of nanomaterials. 

Nano Lett. 10, 3453 (2010)

	Direct laser writing of nanoscale light-emitting diodes

Direct laser writing of nanoscale light-emitting diodes

We have fabricated sub-micrometer light emitting diodes in a mesoscopic semiconductor structure by means of a focused laser beam.

Adv. Mater. 22, 3176 (2010)

	Electromechanical tuning of quantum dot emission energies

Electromechanical tuning of quantum dot emission energies

Elastic mechanical strain is a powerful control tool for engineering the electronic states in quantum dots.

Phys. Rev. Lett. 104, 067405 (2010)

	Metamaterial fiber optics

Metamaterial fiber optics

E. J. Smith, Z. Liu, Y. Mei, O. G. Schmidt

Nano Lett. 10, 1, 1-5 (2010)

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	When Silicon becomes a better thermal insulator than glass…

When Silicon becomes a better thermal insulator than glass…

Introducing Ge nanostructures into single-crystalline Si leads to thermal conductivities which are lower than any other SiGe alloy, amorphous Si  and even glass.

Nat. Mater. 9, 491 (2010)

	Rolled-up hyperlens

Rolled-up hyperlens

An investigation of the material makeup and surrounding medium of an optical rolled-up hyperlens is presented.

Applied Physics Letters 95, 083104 (2009)

Applied Physics Letters 96, 019902 (2010)

	Advanced quantum dot configurations

Advanced quantum dot configurations

We have presented an overview on approaches currently employed to fabricate advanced quantum dot configurations by epitaxial growth.

Rep. Prog. Phys. 72, 046502 (2009)

	Epitaxial quantum dots in stretchable optical microcavities

Epitaxial quantum dots in stretchable optical microcavities

Arrays of GaAs microring optical resonators with embedded quantum dots are placed on top of piezoelectric actuators, which allow the microcavities to be reversibly “stretched” or “squeezed” by applying relatively large biaxial stresses at low temperatures. 

Opt. Express 17, 22452 (2009)

	Tuneable electronic shell structure of GaAs quantum dots

Tuneable electronic shell structure of GaAs quantum dots

We have studied quantum dots for which the wetting layer thickness can be arbitrarily controlled.

Phys. Rev. B 80, 085309 (2009)

	Ultrathin AlN/GaN nanomembranes

Ultrathin AlN/GaN nanomembranes

Y. Mei, D. J. Thurmer, C. Deneke, S. Kiravittaya, Y.-F. Chen, A. Dadgar, F. Bertram, B. Bastek, A. Krost, J. Christen, T. Reindl, M. Stoffel, E. Coric†, O. G. Schmidt

ACS Nano 3, 1663 (2009)

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	Self-assembled quantum dot molecules

Self-assembled quantum dot molecules

L. Wang, A. Rastelli, S. Kiravittaya, M. Benyoucef, O. G. Schmidt

Adv. Mater. 21, 2601 (2009)

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	From wrinkling to rolling

From wrinkling to rolling

We have explored the change-over from wrinkling to rolling for compressively strained thin solid films.

Phys. Rev. B 79, 085429 (2009)

	 New planar hybrid heterostructures and superlattices

New planar hybrid heterostructures and superlattices

We have invented an entirely new approach to create hybrid material layer stacks, which cannot be produced by any other technology. 

Appl. Phys. Lett. 94, 053102 (2009)

	Spectral tunability of microtube resonators on glass

Spectral tunability of microtube resonators on glass

The tunability of optical resonant modes of spiral microtube cavities, rolled-up from square patterned SiO/SiO2 thin nanomembranes on glass substrates, is demonstrated experimentally by coating the tube walls by atomic layer deposition. 

Opt. Lett. 34, 2345 (2009)

	Shaped tubular optical microcavities

Microtubular optical cavities

G. S. Huang, S. Kiravittaya, V. A. Bolaños Quiñones, F. Ding, M. Benyoucef, A. Rastelli1, Y. F. Mei, O. G. Schmidt

Appl. Phys. Lett. 94, 141901 (2009)

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	First single photon source on silicon substrate

First single photon source on silicon substrate

we demonstrate triggered single-photon emission from a single quantum dot grown on Si substrate  for the first time.

Nano Lett. 9, 304–307 (2009)

	First magnetic rolled-up microtubes demonstrated

First magnetic rolled-up microtubes demonstrated

Magnetic rolled-up microtubes are fabricated for the first time, and their hysteresis curves are measured.

Nanotechnology 20, 045703 (2009)

Phys. Status Solidi C 5, 2704 (2008)

	Strain engineered micro-/nanotubes on polymers

Strain engineered micro-/nanotubes on polymers

Y. Mei, G. Huang, A. A. Solovev, E. Bermúdez Ureña, I. Mönch, F. Ding, T. Reindl, R. K. Y. Fu, P. K. Chu, O. G. Schmidt

Adv. Mater. 20, 4085 (2008)

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	Quantum dot crystal defects

Quantum dot crystal defects

In analogy to a conventional crystal we have introduced the terminology and formation of vacancy and interstitial defects in artificial crystals.

Appl. Phys. Lett. 93, 173109 (2008)

	Nanogrooves attract quantum dots

Nanogrooves attract quantum dots

We demonstrate that gentle grooves on a Si substrate "attract" self-assembled SiGe quantum dots  and provide a way to control their position on the substrate.

Phys. Rev. Lett. 101, 096103 (2008)

	Absolute positioning of quantum dots for large scale integration

Absolute positioning of quantum dots for large scale integration

We  control the nucleation sites of quantum dots by small pit patterns on the substrate surface.

Appl. Phys. Lett. 93, 101908 (2008)

	Three-dimensional (3D) composition profiles of quantum dots

Three-dimensional composition profiles of quantum dots

We have developed a simple “nanotomography” approach based on scanning probe microscopy and selective wet chemical etching. 

Nano Lett. 8, 1404 (2008)

	Self-organisation into nanochannel networks

Self-organisation of nanochannel networks

A. Malachias, Y. Mei, R. K. Annabattula, C. Deneke, P. R. Onck, O. G. Schmidt

ACS Nano 2: 1715 (2008)

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	Lateral alignment of epitaxial quantum dots

Lateral alignment of epitaxial quantum dots

Quantum dots constitute a natural template to construct refined artificial matter, such as artificial atoms, molecules and possibly artificial crystals with entirely new electronic and optical properties.

Lateral alignment of epitaxial quantum dots

	From dots to rods

From dots to rods

Periodic metal patterns on a silicon surface provide unprecedented control over the morphology of highly ordered Ge islands.

Phys. Rev. Lett. 98, 106102 (2007)

	Nanochannel arrays by deterministic layer wrinkling

Nanochannel arrays by deterministic layer wrinkling

We have developed a method that exploits the deterministic wrinkling and a subsequent bond-back of a semiconductor layer to create well-defined and versatile nanochannel networks.

Adv. Mater. 19, 2124 (2007)

	Semiconductor/metal radial superlattices

Semiconductor/metal radial superlattices

Strained rolled-up heterostructures allow for the creation of radial superlattices incorporating crystalline and non-crystalline material.

Appl. Phys. Lett. 90, 263107 (2007)

	Quantum wells illuminate the strain state of nanomembranes

Quantum wells illuminate the strain state of nanomembranes

The strain state of a wrinkled nanomembrane has been accurately analyzed by incorporating a quantum well into the layer and subsequently using micro-photoluminescence  to investigate the shift of the transition energy.

Nano Lett. 7, 1676 (2007)

	Perfectly resonant quantum dots

Perfectly resonant quantum dots

Laser processing is used as a post-growth method to tune, within a broad spectral range and with resolution-limited accuracy, the confined energy states of single quantum dots.

Appl. Phys. Lett. 90, 073120 (2007)