scholarly journals Multifunctional NaYF4:Yb3+,Er3+@SiO2@Au heterogeneous nanocomposites for upconversion luminescence, temperature sensing and photothermal conversion

RSC Advances ◽  
2017 ◽  
Vol 7 (19) ◽  
pp. 11491-11495 ◽  
Author(s):  
Dongdong Li ◽  
Wen-Yong Lai ◽  
Qiyue Shao ◽  
Wei Huang
Keyword(s):  
Real Time ◽  
Photothermal Therapy ◽  
Upconversion Luminescence ◽  
Temperature Monitoring ◽  
Temperature Sensing ◽  
Photothermal Conversion

NaYF4:Yb3+,Er3+@SiO2@Au heterogeneous nanostructures, with the ability of integrating upconversion luminescence, photothermal therapy and real-time temperature monitoring, have been successfully prepared.

High-Quantum-Yield Upconverting Er3+/Yb3+-Organic–Inorganic Hybrid Dual Coatings for Real-Time Temperature Sensing and Photothermal Conversion

2020 ◽  
Vol 124 (37) ◽  
pp. 19892-19903
Author(s):  
Fábio J. Caixeta ◽  
Ana R. N. Bastos ◽  
Alexandre M. P. Botas ◽  
Leonardo S. Rosa ◽  
Vítor S. Souza ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Real Time ◽  
Temperature Sensing ◽  
High Quantum Yield ◽  
Inorganic Hybrid ◽  
Photothermal Conversion ◽  
High Quantum

Multifunctional NaYF4:Yb3+, Er3+@Au Nanocomposites: Upconversion Luminescence, Temperature Sensing and Photothermal Therapy

2015 ◽  
Vol 1088 ◽  
pp. 23-27 ◽  
Author(s):  
Dong Dong Li ◽  
Qi Yue Shao ◽  
Yan Dong ◽  
Jian Qing Jiang
Keyword(s):  
Gold Nanoparticles ◽  
Photothermal Therapy ◽  
Upconversion Luminescence ◽  
Separation Distance ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Composite Nanostructures ◽  
Sensing Properties ◽  
Quenching Effect ◽  
Biomedical Fields

Composite nanostructures of NaYF4:Yb3+, Er3+@Au have been successfully prepared by attaching gold nanoparticles onto the surface of NaYF4: Yb3+, Er3+ upconversion nanoparticles (UCNPs). NaYF4 inert shell was used to adjust the separation distance between gold nanoparticles and UCNPs. Effects of the gold nanoparticles on their upconversion luminescent (UCL), temperature sensing and photothermal therapy properties were systematically investigated. For all samples, a slight decrease of the UCL intensity was observed after gold nanoparticles attachment, suggesting that the nonradiative quenching effect is the dominant interaction between UCNPs and gold nanoparticles. However, the reduction of the UCL intensity is negligible due to the significant improvement of UCL properties by NaYF4shell. In addition, the gold attachment can obviously improve the photothermal conversion effect, but do not affect the temperature sensing properties of NaYF4:Yb3+, Er3+ UCNPs, indicating their high capability for multifunctional applications in biomedical fields.

A Photothermal Therapy Strategy for Monitoring Real-Time Temperature in Kidney Cancers by Injecting Gold Nanorods with Phosphors

2021 ◽  
Vol 17 (3) ◽  
pp. 501-508
Author(s):  
Wenzeng Shen ◽  
Xuefeng Zhang ◽  
Dongyang Liu ◽  
Christina Xing ◽  
Isabelle Tucker ◽  
...  
Keyword(s):  
Real Time ◽  
Gold Nanorods ◽  
Photothermal Therapy ◽  
Normal Tissue ◽  
Temperature Monitoring ◽  
Internal Temperature ◽  
Absorbed Energy ◽  
Ablation Therapy ◽  
Photothermal Ablation ◽  
Therapy Strategy

Photothermal ablation therapy (PTA) has been widely reported; however, it is not possible to predict the internal temperature of the tumor in real time that causes ineffective treatment and normal tissue burns. Here, we have designed a photothermal therapy strategy under real-time temperature monitoring by injecting gold nanorods (AuNRs) and NaYF4: Yb3+ /Er3+ into the tumor site where AuNRs are used for PTA of cancer cells by converting the absorbed energy into heat and using Yb3+ , Er3+-NaYF 4 phosphors to monitor the temperature inside the tumor. Our experiments confirm the effectiveness of this strategy, which is expected to be an aid in the development of real-time temperature monitoring and effective photothermal therapy for the treatment of cancers.

Facile synthesis of polypyrrole–rhodamine B nanoparticles for self-monitored photothermal therapy of cancer cells

2020 ◽  
Vol 8 (5) ◽  
pp. 1033-1039 ◽  
Author(s):  
Xiao-Hui Wang ◽  
Xue-Qiao Chen ◽  
Hong-Shang Peng ◽  
Xiao-Fei Wei ◽  
Xiao-Juan Wang ◽  
...  
Keyword(s):  
Cancer Cells ◽  
Real Time ◽  
Rhodamine B ◽  
Photothermal Therapy ◽  
Temperature Monitoring ◽  
Facile Synthesis ◽  
Functional Nanoparticles ◽  
Dual Functional ◽  
Photothermal Ablation

Biocompatible dual-functional nanoparticles combining polypyrrole with rhodamine B are constructed for photothermal ablation of cancer cells and real-time temperature monitoring during PTT.

Upconversion nanoparticles modified by Cu2S for photothermal therapy along with a real-time optical thermometry

Nanoscale ◽  
2021 ◽  
Author(s):  
Guotao Xiang ◽  
Qing Xia ◽  
Xiaotong Liu ◽  
Yongjie Wang ◽  
Sha Jiang ◽  
...  
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Photothermal Therapy ◽  
Upconversion Nanoparticles ◽  
Photothermal Conversion ◽  
Temperature Detection ◽  
Optical Thermometry ◽  
Highly Effective ◽  
Conversion Performance

Highly effective photothermal conversion performance assembled with high resolution temperature detection in real time is an urgent need for photothermal therapy (PTT). Herein, the ultra-small Cu2S nanoparticles (NPs) is designed...

Coconut-shell-derived activated carbon for NIR photo-activated synergistic photothermal-chemodynamic cancer therapy

2021 ◽  
Author(s):  
Gang Wu ◽  
Bao Jiang ◽  
Lin Zhou ◽  
Ao Wang ◽  
Shaohua Wei
Keyword(s):  
Activated Carbon ◽  
Cancer Therapy ◽  
Cancer Treatment ◽  
Photothermal Therapy ◽  
Carbon Nanoparticles ◽  
Coconut Shell ◽  
Photothermal Conversion

Activated carbon nanoparticles (ANs) were synthesized from coconut shell. ANs show peroxidase and photothermal conversion activities, allowing synergistic cancer treatment via chemodynamic therapy (CDT) and photothermal therapy (PTT).

scholarly journals Design of a Real-Time Breakdown Voltage and On-Chip Temperature Monitoring System for Single Photon Avalanche Diodes

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 25
Author(s):  
Shijie Deng ◽  
Alan P. Morrison ◽  
Yong Guo ◽  
Chuanxin Teng ◽  
Ming Chen ◽  
...  
Keyword(s):  
Real Time ◽  
Breakdown Voltage ◽  
Count Rate ◽  
Single Photon ◽  
Photon Counting ◽  
Temperature Monitoring ◽  
Dark Count ◽  
Chip Temperature ◽  
Avalanche Diodes ◽  
On Chip

The design and implementation of a real-time breakdown voltage and on-chip temperature monitoring system for single photon avalanche diodes (SPADs) is described in this work. In the system, an on-chip shaded (active area of the detector covered by a metal layer) SPAD is used to provide a dark count rate for the breakdown voltage and temperature calculation. A bias circuit was designed to provide a bias voltage scanning for the shaded SPAD. A microcontroller records the pulses from the anode of the shaded SPAD and calculates its real-time dark count rate. An algorithm was developed for the microcontroller to calculate the SPAD’s breakdown voltage and the on-chip temperature in real time. Experimental results show that the system is capable of measuring the SPAD’s breakdown voltage with a mismatch of less than 1.2%. Results also show that the system can provide real-time on-chip temperature monitoring for the range of −10 to 50 °C with errors of less than 1.7 °C. The system proposed can be used for the real-time SPAD’s breakdown voltage and temperature estimation for dual-SPADs or SPAD arrays chip where identical detectors are fabricated on the same chip and one or more dummy SPADs are shaded. With the breakdown voltage and the on-chip temperature monitoring, intelligent control logic can be developed to optimize the performance of the SPAD-based photon counting system by adjusting the parameters such as excess bias voltage and dead-time. This is particularly useful for SPAD photon counting systems used in complex working environments such as the applications in 3D LIDAR imaging for geodesy, geology, geomorphology, forestry, atmospheric physics and autonomous vehicles.

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