Results 111 to 120 of about 36,694 (225)

Cascade upconversion: a strategy enabling four-photon lithography in weak light intensity

Nature Communications
Multiphoton lithography offers the minimum feature size available in submicron scale true 3D printing, but excessive femtosecond laser intensity prevents it from leading to higher photon counts.
Shishuo Li, Kai Li, Chenqi Yi, Xingyu Gao, Zongsong Gan   +4 more
doaj   +1 more source

Precharging Photon Upconversion: Interfacial Interactions in Solution-Processed Perovskite Upconversion Devices

The Journal of Physical Chemistry Letters, 2019
Recent advances in perovskite-sensitized photon upconversion via triplet-triplet annihilation (TTA) in rubrene have yielded several unanswered questions about the underlying mechanism and processes occurring at the interface. In particular, the near-infrared perovskite emission is not significantly quenched and a rapid reversible photobleach of the ...
Sarah Wieghold, Lea Nienhaus
openaire   +2 more sources

Oral Squamous Cell Carcinoma‐Risk Factors, Diagnosis, Treatment, and Prevention

Cancer Nexus, EarlyView.
ABSTRACT Oral squamous cell carcinoma (OSCC) usually originates from the precancerous lesions of oral mucosa and accounts for approximately 90% of oral cancers. In‐depth understanding of pathogenesis, hallmarks, and etiological factors is a crucial prerequisite for advancing the diagnosis and treatment for OSCC patients. This review aims to present the
Liping Wang, Xiaole Liu, Mengjie Chen, Ying Hu, Lilei Zhu   +4 more
wiley   +1 more source

Bright upconversion over extended temperatures enabled by an organic surface layer

Nature Communications
Lanthanide-doped nanocrystals are promising for photon frequency upconversion with substantial spectrum tunability. However, the utilization of the upconversion process has been constrained by low luminescence efficiency, which may further attenuate at ...
Hao Suo, Peihang Zhao, Xin Zhang, Yang Guo, Dongxu Guo, Jiwen Chang, Jiangkun Chen, Panlai Li, Zhijun Wang, Hanlin Wei, Weilin Zheng, Feng Wang   +11 more
doaj   +1 more source

JUDD-OFELT ANALYSIS OF Tb3+ AND UPCONVERSION STUDY IN Yb3+-Tb3+ CO-DOPED CALIBO GLASSES

Química Nova
We report on the study of the spectroscopic properties in Ytterbium-Terbium (Yb3+-Tb3+) co-doped calcium lithium borate (CaLiBO) glasses, with the study’s focus being on the upconversion process.
Idelma A. A. Terra, Luis J. Borrero-González, Juliana M. P. Almeida, Antonio C. Hernandes, Luiz A. O. Nunes   +4 more
doaj   +1 more source

Ultralow-threshold, continuous-wave upconverting lasing from subwavelength plasmons. [PDF]

, 2019
Miniaturized lasers are an emerging platform for generating coherent light for quantum photonics, in vivo cellular imaging, solid-state lighting and fast three-dimensional sensing in smartphones1-3.
Barnard, Edward S, Chan, Emory M, Cohen, Bruce E, Fernandez-Bravo, Angel, Guan, Jun, Odom, Teri W, Schatz, George C, Schuck, P James, Tajon, Cheryl, Teitelboim, Ayelet, Wang, Danqing   +10 more
core  

Nanoparticles in microdroplets: Recent advances in microfluidic generators for producing functional microbeads

Droplet, EarlyView.
Functional hybrid microbeads with electrical, magnetic, and/or optical responsiveness have emerged as versatile platforms for biotechnology. This review highlights recent advances in microfluidic technologies for producing such microbeads, with a focus on incorporating functional nanoparticles in microdroplet systems.
  Bayinqiaoge, Chengchen Zhang, Shi‐Yang Tang   +2 more
wiley   +1 more source

Tuning NaYF4 Nanoparticles through Alkaline Earth Doping

Nanomaterials, 2013
Phase and size of lanthanide-doped nanoparticles are the most important characteristics that dictate optical properties of these nanoparticles and affect their technological applications.
Feng Wang, Xian Chen, Dengfeng Peng
doaj   +1 more source

Programmable luminescent platform based on carbon quantum dots enables wavelength‐multiplexed optical data storage and encryption

FlexMat, EarlyView.
A carbon‐quantum‐dots (CQDs)‐based programmable luminescent platform is proposed for multidimensional optical information encryption and high‐capacity data storage by leveraging wavelength‐division multiplexing. Furthermore, a prototype tri‐layer optical disk is demonstrated, where data written via laser ablation on different CQD layers are retrieved ...
Honglei Sun, Qingfeng Gui, Yunsong Di, Zihan Ying, Siqi Liu, Mengqi Li, Meng Zhang, Lun Yang, Yushen Liu, Zhixing Gan   +9 more
wiley   +1 more source

Spirobifluorene fusion in multiple resonance frameworks enables efficient pure‐red OLEDs with narrowband emission and suppressed efficiency roll‐off

FlexMat, EarlyView.
An orthogonal spirobifluorene‐fusion strategy is introduced for B/N/O‐alternated MR frameworks, enabling improved kRISC (5.46 × 103 s−1), high ΦPL (97%), and narrow‐band pure‐red emission. Vacuum‐evaporated OLEDs incorporating this emitter achieve an EQEmax >40% (FWHM = 36 nm) and exhibit exceptionally low efficiency roll‐off at high luminance ...
Yan‐Yun Jing, Han Wu, Xiaoling Xu, Sijie Xian, Jingsheng Miao, Xiaojun Yin, Chuluo Yang, Xiaosong Cao   +7 more
wiley   +1 more source