Improvement of Emission Intensity for Near-infrared-emitting Ca14Zn6Al10O35:Mn4+Phosphor by Oxygen-pressure Method

2016 ◽  
Vol 45 (9) ◽  
pp. 1096-1098 ◽  
Author(s):  
Takuya Hasegawa ◽  
Sun Woog Kim ◽  
Takeshi Abe ◽  
Shota Kumagai ◽  
Ryota Yamanashi ◽  
...  
Keyword(s):  
Oxygen Pressure ◽  
Emission Intensity ◽  
Near Infrared ◽  
Pressure Method

scholarly journals Mismatch between Tissue Partial Oxygen Pressure and Near-Infrared Spectroscopy Neuromonitoring of Tissue Respiration in Acute Brain Trauma: The Rationale for Implementing a Multimodal Monitoring Strategy

2021 ◽  
Vol 22 (3) ◽  
pp. 1122
Author(s):  
Mario Forcione ◽  
Mario Ganau ◽  
Lara Prisco ◽  
Antonio Maria Chiarelli ◽  
Andrea Bellelli ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Oxygen Pressure ◽  
Near Infrared ◽  
Optical Signal ◽  
Brain Trauma ◽  
Partial Oxygen Pressure ◽  
Tissue Respiration ◽  
The Brain ◽  
Partial Oxygen

The brain tissue partial oxygen pressure (PbtO2) and near-infrared spectroscopy (NIRS) neuromonitoring are frequently compared in the management of acute moderate and severe traumatic brain injury patients; however, the relationship between their respective output parameters flows from the complex pathogenesis of tissue respiration after brain trauma. NIRS neuromonitoring overcomes certain limitations related to the heterogeneity of the pathology across the brain that cannot be adequately addressed by local-sample invasive neuromonitoring (e.g., PbtO2 neuromonitoring, microdialysis), and it allows clinicians to assess parameters that cannot otherwise be scanned. The anatomical co-registration of an NIRS signal with axial imaging (e.g., computerized tomography scan) enhances the optical signal, which can be changed by the anatomy of the lesions and the significance of the radiological assessment. These arguments led us to conclude that rather than aiming to substitute PbtO2 with tissue saturation, multiple types of NIRS should be included via multimodal systemic- and neuro-monitoring, whose values then are incorporated into biosignatures linked to patient status and prognosis. Discussion on the abnormalities in tissue respiration due to brain trauma and how they affect the PbtO2 and NIRS neuromonitoring is given.

Migration of Materials During Accelerated Aging By Oxygen Pressure Method

1951 ◽  
Vol 23 (11) ◽  
pp. 1646-1649 ◽  
Author(s):  
Marion Fackler ◽  
John Rugg
Keyword(s):  
Oxygen Pressure ◽  
Accelerated Aging ◽  
Pressure Method

High near-infrared emission intensity of Er3+-doped zirconium oxide films on a Si(100) substrate

2013 ◽  
Author(s):  
V. A. G. Rivera ◽  
F. A. Ferri ◽  
J. L. Clabel H. ◽  
M. K. Kawamura ◽  
M. A. Pereira-da-Silva ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Zirconium Oxide ◽  
Near Infrared ◽  
Oxide Films ◽  
Infrared Emission ◽  
Near Infrared Emission

Luminescence Properties of Er3+/Tm3+-Doped Ga2O3-Bi2O3-PbO-GeO2 System Glasses

2011 ◽  
Vol 399-401 ◽  
pp. 982-986
Author(s):  
Jin Liu ◽  
Dong Mei Shi ◽  
Ying Gang Zhao ◽  
Xiao Feng Wang
Keyword(s):  
Emission Intensity ◽  
Near Infrared ◽  
Emission Spectra ◽  
Upconversion Emission ◽  
Infrared Emission ◽  
Optical Devices ◽  
Luminescence Properties ◽  
Red Emission ◽  
Fiber Optical ◽  
Near Infrared Emission

The visible and near infrared emission spectra of Er3+/Tm3+-doped Ga2O3-Bi2O3-PbO-GeO2(GBPG) glasses excited at 808 nm are experimentally investigated. The results reveal that 1.53 µm emission were enhanced with an increase of Er3+concentration. Furthermore, the incorporation of Er3+into Tm3+-doped systems has also resulted in intense 522, 545 and 693nm upconversion emission intensity and an weak 660 nm red emission. The possible mechanism and related discussions on this phenomenon have been presented. The results show that Er3+/Tm3+-codoped GBPG glass may be a promising materials for developing laser and fiber optical devices.

An efficient dye-sensitized NIR emissive lanthanide nanomaterial and its application in fluorescence-guided peritumoral lymph node dissection

Nanoscale ◽  
2018 ◽  
Vol 10 (26) ◽  
pp. 12573-12581 ◽  
Author(s):  
Qingyun Liu ◽  
Xianmei Zou ◽  
Yibing Shi ◽  
Bin Shen ◽  
Cong Cao ◽  
...  
Keyword(s):  
Lymph Node ◽  
Lymph Node Dissection ◽  
Emission Intensity ◽  
Near Infrared ◽  
Infrared Emission ◽  
Node Dissection ◽  
Dye Sensitized ◽  
Near Infrared Emission

Through combining Cy7 and NaYbF4@NaYF4:60%Nd together to form a dye-sensitized system, the near-infrared emission intensity of Yb was significantly enhanced.

Preparation, growth mechanism, size manipulation and near-infrared luminescence enhancement of β-NaYF4:Nd3+ microcrystals via Ca2+ doping

CrystEngComm ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 741-748 ◽  
Author(s):  
Qinqin Shao ◽  
Hong Zhang ◽  
Jiangyun Dai ◽  
Chao Yang ◽  
Xiaoxu Chen ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Emission Intensity ◽  
Near Infrared ◽  
Infrared Emission ◽  
Luminescence Enhancement ◽  
Infrared Luminescence ◽  
Near Infrared Emission

The near-infrared emission intensity of NaYF4:3% Nd3+ doped with 20 mol% Ca2+ is 3 times that of the Ca2+-free samples.

scholarly journals Near-infrared excited luminescence and in vitro imaging of HeLa cells by using Mn2+ enhanced Tb3+ and Yb3+ cooperative upconversion in NaYF4 nanocrystals

2019 ◽  
Vol 1 (9) ◽  
pp. 3463-3473 ◽  
Author(s):  
Katarzyna Prorok ◽  
Michał Olk ◽  
Michał Skowicki ◽  
Agnieszka Kowalczyk ◽  
Agata Kotulska ◽  
...  
Keyword(s):  
Hela Cells ◽  
Emission Intensity ◽  
Near Infrared ◽  
Upconversion Emission ◽  
Significant Enhancement ◽  
New Approach ◽  
Co Doping ◽  
Cooperative Upconversion ◽  
Excited Luminescence

To improve the Tb3+ upconversion emission intensity, a new approach, i.e. Mn2+ co-doping, has been proposed and verified in this work. The significant enhancement of the emission intensity as a result of the introduction of Mn2+ ions was observed.

Effect of Ce3+ Concentration on the Luminescence Properties of Ce3+/Er3+/Yb3+ Tri-Doped NaYF4 Nanocrystals

2016 ◽  
Vol 16 (4) ◽  
pp. 3749-3753 ◽  
Author(s):  
Xuee Liu ◽  
Jianbei Qiu ◽  
Xuhui Xu ◽  
Dacheng Zhou
Keyword(s):  
Energy Transfer ◽  
Hydrothermal Method ◽  
Fluorescence Intensity ◽  
Emission Intensity ◽  
Doping Concentration ◽  
Near Infrared ◽  
Luminescence Properties ◽  
Emission Mechanism ◽  
Emission Properties ◽  
Nir Emission

In order to investigate the effect of Ce3+ concentration on the emission properties of Er3+/Yb3+ codoped NaYF4 nanocrystals, Ce3+/Er3+/Yb3+ tri-doped NaYF4 nanocrystals were prepared through a facile EDTA-assisted hydrothermal method. The upconversion (UC) and the near infrared (NIR) emission properties of Er3+ ions were systematically investigated in the NaYF4:Ce3+/Er3+/Yb3+ nanocrystals. Under 980 nm excitation, with the increasing of Ce3+ concentration, the emission intensity of Er3+ at 1550 nm (4I13/2 → 4I15/2) band increases initially and then decreases. The increase of the fluorescence intensity of 1550 nm is due to the energy transfer between Er3+ and Ce3+ ions: Er3+:4I11/2 +Ce3+:2F5/2 → Er3+:4I13/2 +Ce3+:2F7/2. But when Ce3+ doping concentration is 2.0%, the cross relaxation:Er3+:4I13/2 +Ce3+:2F5/2 →Er3+:4I15/2 +Ce3+:2F7/2 happens, which depopulates the 4I13/2 level of Er3+ and results in the decrease of the emission intensity of Er3+ at 1550 nm band. Meanwhile, incorporation of Ce3+ dramatically decreases the visible UC emission intensity. A possible emission mechanism was proposed.

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