Article
|
Open Access
Featured
-
-
Article |
In vivo ultrasound-induced luminescence molecular imaging
Ultrasound-induced luminescence enables in vivo molecular imaging of tumours and lymph nodes with spatial resolution of 1.46 mm.
- Youjuan Wang
- , Zhigao Yi
- & Weihong Tan
-
Article |
Size-dependent lanthanide energy transfer amplifies upconversion luminescence quantum yields
Researchers demonstrate a size-dependent lanthanide energy transfer effect in upconversion nanoparticles with depleted surface quenching, resulting in upconversion quantum yields of 13.0 ± 1.3%.
- Feng Li
- , Langping Tu
- & Guanying Chen
-
Article |
Dynamic monitoring of oscillatory enzyme activity of individual live bacteria via nanoplasmonic optical antennas
Nanoplasmonic antennas enable label-free monitoring of bacterial enzymes released via outer membrane vesicles. Real-time monitoring reveals the oscillatory behaviour of enzymatic release from individual bacteria as well as the effects of coupled oscillation from neighbouring bacteria.
- Dengyun Lu
- , Guoshuai Zhu
- & Hongbao Xin
-
Article |
Hong–Ou–Mandel interference in colloidal CsPbBr3 perovskite nanocrystals
Large perovskite nanocrystals are synthesized to increase the cryogenic exciton radiative rate. At liquid helium temperatures, single photons from perovskite nanocrystals coalesce at a beam splitter, signalling the existence of indistinguishable photon emission.
- Alexander E. K. Kaplan
- , Chantalle J. Krajewska
- & Moungi G. Bawendi
-
Article
| Open Access
Efficient radioactive gas detection by scintillating porous metal–organic frameworks
Detection of gas radionuclides is limited in sensitivity with present methods, but may be useful in energy, security, medical and other sectors. In this work, gas-concentrating porous scintillating metal–organic frameworks are demonstrated for gas radionuclide detection.
- Matteo Orfano
- , Jacopo Perego
- & Angelo Monguzzi
-
Article |
Bright single-nanocrystal upconversion at sub 0.5 W cm−2 irradiance via coupling to single nanocavity mode
Bright upconversion of single nanocrystals is enabled by coupling to a single plasmonic nanocavity mode. An upconversion luminescence enhancement of ~105 was achieved. Single sub-30-nm nanocrystals provided 560 detected photons per second at an excitation intensity of just 0.45 W cm−2.
- Yongjun Meng
- , Dingxin Huang
- & Xue-Wen Chen
-
Article |
Room-temperature upconverted superfluorescence
Under near-infrared-light excitation, anti-Stokes-shift superfluorescence is observed near 590 nm at room temperature in a medium of lanthanide-doped upconversion nanoparticles. The spectral width and radiative decay lifetime are 2 nm and 46 ns, respectively, in the single-nanoparticle case.
- Kai Huang
- , Kory Kevin Green
- & Shuang Fang Lim
-
News & Views |
Giant nonlinearity in upconversion nanoparticles
Co-doping ytterbium and praseodymium ions in photon avalanche nanoparticles rapidly builds up huge optical nonlinearities, enabling confocal microscopy to achieve super-resolution imaging at high speed.
- Chaohao Chen
- & Dayong Jin
-
Letter |
Multiple exciton generation in tin–lead halide perovskite nanocrystals for photocurrent quantum efficiency enhancement
Researchers demonstrate low-threshold multiple exciton generation and photocurrent quantum efficiency exceeding 100% from high-energy photons in perovskite nanocrystals.
- Yifan Chen
- , Jun Yin
- & Mingjie Li
-
-
Article |
Third-harmonic Mie scattering from semiconductor nanohelices
Third-harmonic Mie scattering optical activity from suspensions of semiconductor (CdTe) nanostructured helices is observed, opening ways for chiroptical characterization of semiconductor and other chiral non-metallic particles in volumes potentially of the order of 10–17 m3.
- Lukas Ohnoutek
- , Ji-Young Kim
- & Ventsislav K. Valev
-
Letter |
Anomalous upconversion amplification induced by surface reconstruction in lanthanide sublattices
Strong lanthanide-doped upconversion luminescence enhancement is achieved by the use of surface molecules which enhance four-photon upconversion emission. The results may lead to new, highly emissive, nanohybrid systems.
- Hui Xu
- , Sanyang Han
- & Xiaogang Liu
-
Article |
Bright and stable light-emitting diodes made with perovskite nanocrystals stabilized in metal–organic frameworks
The use of metal–organic frameworks helps protect perovskite nanocrystals, resulting in bright, stable light-emitting diodes.
- Hsinhan Tsai
- , Shreetu Shrestha
- & Wanyi Nie
-
Article |
Slow carrier relaxation in tin-based perovskite nanocrystals
Tin-based perovskite nanocrystals with slower than usual relaxation dynamics holds promise for superior lead-free perovskite optoelectronic devices.
- Linjie Dai
- , Zeyu Deng
- & Neil C. Greenham
-
Article |
Composite fast scintillators based on high-Z fluorescent metal–organic framework nanocrystals
Composites of fluorescent metal–organic framework nanocrystals in a polymer are exploited to create fast scintillators with a rise time of about 50 ps.
- J. Perego
- , I. Villa
- & A. Monguzzi
-
Article |
Suppression of temperature quenching in perovskite nanocrystals for efficient and thermally stable light-emitting diodes
Fluoride-treated CsPbBr3 nanocrystals emit light with near unity efficiency at temperatures of up to 373 K.
- Mingming Liu
- , Qun Wan
- & Liang Li
-
Article |
Comprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes
Guanidinium doping is shown to enhance the operation of perovskite nanocrystal light-emitting diodes.
- Young-Hoon Kim
- , Sungjin Kim
- & Tae-Woo Lee
-
Article |
NIR II-responsive photon upconversion through energy migration in an ytterbium sublattice
An ytterbium sublattice in an erbium-sensitized multilayer core–shell structure enables photon upconversion from lanthanide ions under 1,530 nm irradiation.
- Bo Zhou
- , Long Yan
- & Qinyuan Zhang
-
Article |
Broadband Mie driven random quasi-phase-matching
Enhanced second-harmonic generation is achieved through random quasi-phase-matching in three-dimensional Mie resonant disordered microspheres realized by the bottom-up assembly of barium titanate nanocrystals.
- Romolo Savo
- , Andrea Morandi
- & Rachel Grange
-
News & Views |
Untapping solar energy resources
The photovoltaics market has long been dominated by silicon, but further improvements of these solar cells require novel approaches. Now, triplet–triplet annihilation photon upconversion has been used to harvest photons from below the bandgap of silicon, extending the spectral response and potentially improving the efficiency of these cells.
- Bo Albinsson
- & Axel Olesund
-
-
Article |
Photochemical upconversion of near-infrared light from below the silicon bandgap
Photochemical upconversion of light with photon energy below the silicon bandgap has remained elusive, but the feat has now been demonstrated using PbS semiconductor nanocrystals and violanthrone.
- Elham M. Gholizadeh
- , Shyamal K. K. Prasad
- & Timothy W. Schmidt
-
-
Letter |
Light-induced magnetism in plasmonic gold nanoparticles
Optically induced magnetization is experimentally demonstrated using gold nanoparticles. The inverse-Faraday-effect-enabled magnetization may lead to new types of compact optical isolator.
- Oscar Hsu-Cheng Cheng
- , Dong Hee Son
- & Matthew Sheldon
-
Letter |
Reversible 3D laser printing of perovskite quantum dots inside a transparent medium
Luminescent CsPbBr3 quantum dots can be written into glass using femtosecond laser pulses and thermal annealing, and erased by further femtosecond laser irradiation. The resulting quantum dot patterns could prove useful for data storage, decoration or security purposes.
- Xiongjian Huang
- , Qianyi Guo
- & Guoping Dong
-
Review Article |
Future and challenges for hybrid upconversion nanosystems
The prospects for improving photon upconversion systems by combining organic dyes and inorganic nanoparticles are reviewed.
- Shihui Wen
- , Jiajia Zhou
- & Dayong Jin
-
Meeting Report |
Into the ‘Mie-tronic’ era
Dielectric antennas and metasurfaces open up new opportunities for future applications in advanced optoelectronics, light detection and ranging for autonomous vehicles, fluorescence-enhancing substrates for bioimaging and many more.
- Rachel Won
-
News & Views |
Overcoming the colour barrier
High-efficiency, time-domain, near-infrared fluorophores provide multiplexed colour channels for distinct deep bioimaging.
- Shoujun Zhu
- & Xiaoyuan Chen
-
-
Letter |
High-sensitivity imaging of time-domain near-infrared light transducer
By time-shifting short-pulse excitation photon energy into prolonged luminescent emission in the time domain, both the number of light signal transducers in sub-15 nm nanoparticles and the near-infrared-in to near-infrared-out conversion efficiency can be maximized, advancing in vivo optical bioimaging.
- Yuyang Gu
- , Zhiyong Guo
- & Fuyou Li
-
-
-
News & Views |
Triplet state brightens upconversion
Efficient photon upconversion is desired for applications ranging from molecular sensing to solar-energy harvesting. Now, the population of hidden triplet state electrons, created on dye antennas and rare-earth-doped nanoparticles, has been amplified to brighten upconversion by five orders of magnitude.
- Jiajia Zhou
- & Dayong Jin
-
Article |
Enrichment of molecular antenna triplets amplifies upconverting nanoparticle emission
Lanthanide-doped upconverting nanoparticles exhibiting a 33,000 times increase in brightness and a 100 times increase in efficiency over bare upconverting nanoparticles are demonstrated. The findings are relevant in fields from solar energy to biophotonics.
- David J. Garfield
- , Nicholas J. Borys
- & P. James Schuck
-
News & Views |
Nanocrystals feel the heat
Phosphors often suffer luminescence quenching at elevated temperatures. Now, thermal quenching can be combated with surface phonon-assisted energy transfer, enabling the luminescence of ultrasmall upconversion nanophosphors to be dramatically enhanced.
- Liangliang Liang
- & Xiaogang Liu
-
Letter |
Femtosecond X-ray Fourier holography imaging of free-flying nanoparticles
Femtosecond X-ray Fourier holography imaging with record-high lateral resolution below 20 nm is demonstrated. Phase information is encoded into the interference of the diffraction patterns of a reference particle with a measurement sample.
- Tais Gorkhover
- , Anatoli Ulmer
- & Christoph Bostedt
-
Letter |
Activation of the surface dark-layer to enhance upconversion in a thermal field
Phonons on the surface of lanthanide-doped upconversion materials are used to combat thermal quenching, enabling ~2,000-fold emission enhancement.
- Jiajia Zhou
- , Shihui Wen
- & Dayong Jin
-
Article |
Plasmonic coupling at a metal/semiconductor interface
The role of direct plasmonic coupling in hot-electron generation at Ag/TiO2 interfaces is clarified by two-photon photoemission spectroscopy.
- Shijing Tan
- , Adam Argondizzo
- & Hrvoje Petek
-
Article |
Giant light-harvesting nanoantenna for single-molecule detection in ambient light
Donor dye nanoparticles have been used to realize structures that are 25 times brighter than quantum dots. This enabled single-molecule imaging using ambient light.
- Kateryna Trofymchuk
- , Andreas Reisch
- & Andrey S. Klymchenko
-
News & Views |
The rise of plasmonic metasurfaces
Ultrathin, versatile, integrated optical devices and high-speed optical information processing could be the upcoming real-world opportunities of plasmonic metasurfaces.
- Rachel Won
-
Article |
Dye-sensitized solar cells for efficient power generation under ambient lighting
A dye-sensitized solar cell that has been designed for efficient operation under indoor lighting could offer a convenient means for powering the Internet of Things.
- Marina Freitag
- , Joël Teuscher
- & Anders Hagfeldt
-
-
Article |
Optical microresonators as single-particle absorption spectrometers
Single-particle double-modulation absorption spectrometers based on whispering-gallery-mode microresonators achieve sub-100-Hz sensitivity to photothermal resonance shifts and allow for the study of arrays of Fano resonances in the context of plasmonic–photonic hybridization.
- Kevin D. Heylman
- , Niket Thakkar
- & Randall H. Goldsmith
-
-
Letter |
Solution-processed solar cells based on environmentally friendly AgBiS2 nanocrystals
AgBiS2 nanocrystals offer a route to solution-processed environmentally friendly solar cells.
- María Bernechea
- , Nichole Cates
- & Gerasimos Konstantatos
-
Article |
Near-field dielectric scattering promotes optical absorption by platinum nanoparticles
A technique to enhance optical absorption by platinum nanoparticles is exploited for driving photocatalytic redox reactions.
- Nan Zhang
- , Chuang Han
- & Yugang Sun
-
-
Article |
X-ray imaging with scintillator-sensitized hybrid organic photodetectors
A 256 × 256 pixel scintillator-based X-ray detector that improves resolution by limiting optical cross-talk is made using terbium-doped gadolinium oxysulfide scintillator particles in an organic photodetector matrix.
- Patric Büchele
- , Moses Richter
- & Oliver Schmidt
-
Article |
Modified optical absorption of molecules on metallic nanoparticles at sub-monolayer coverage
Direct measurements of silver spheres with sub-monolayer concentrations of dye-molecules reveal shifts and broadening of molecular resonances.
- Brendan L. Darby
- , Baptiste Auguié
- & Eric C. Le Ru
Direct linearly polarized electroluminescence from perovskite nanoplatelet superlattices
Molecular optomechanical cavity
Laser nanoprinting
Shrimp eye scattering
Plasmon-enabled disinfection
Assembly by light
Fingerprint visualization