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Lanthanide-doped heterostructured nanocomposites toward advanced optical anti-counterfeiting and information storage

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Light(Science & Applications) 2022年第6期11卷 1264-1273页

作者： Yao Xie Yapai Song Guotao Sun Pengfei Hu artur bednarkiewicz Lining Sun Department of Physics College of SciencesShanghai UniversityShanghai 200444China Department of Chemistry College of SciencesShanghai UniversityShanghai 200444China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Research Center of Nano Science and Technology College of SciencesShanghai UniversityShanghai 200444China Instrumental Analysis&Research Center Shanghai UniversityShanghai 200444China Institute of Low Temperature and Structure Research Polish Academy of Sciences50-422 Wroc?awPoland

The continuously growing importance of information storage,transmission,and authentication impose many new demands and challenges for modern nano-photonic materials and information storage technologies,both in security and storage ***,luminescent lanthanide-doped nanomaterials have drawn much attention in this field because of their photostability,multimodal/multicolor/narrowband emissions,and long luminescence ***,we report a multimodal nanocomposite composed of lanthanide-doped upconverting nanoparticle and EuSe semiconductor,which was constructed by utilizing a cation exchange *** nanocomposite can emit blue and white light under 365 and 394 nm excitation,***,the nanocomposites show different colors under 980 nm laser excitation when the content of Tb3+ions is changed in the upconversion ***,the time-gating technology is used to filter the upconversion emission of a long lifetime from Tb3+or Eu3+,and the possibilities for modulating the emission color of the nanocomposites are further *** on the advantage of multiple tunable luminescence,the nanocomposites are designed as optical modules to load optical *** work enables multi-dimensional storage of information and provides new insights into the design and fabrication of next-generation storage materials.

关键词： lanthanide excitation luminescence

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Nd^(3+)-sensitized upconversion nanoparticle coated with antimony shell for bioimaging and photothermal therapy in vitro using single laser irradiation

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Journal of Rare Earths 2022年第6期40卷 862-869,I0001页

作者： Solomon Tiruneh Dibaba Yao Xie Wensong Xi artur bednarkiewicz Wei Ren Lining Sun Research Center of Nano Science and Technology College of SciencesShanghai UniversityShanghai 200444China Physics Department International Centre for Quantum and Molecular StructuresShanghai UniversityShanghai 200444China Applied Physics Department School of Applied Natural ScienceAdama Science and Technology UniversityAdama 1888Ethiopia School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China Institute of Low Temperature and Structure Research Polish Academy of Sciences50-422 WroclawPoland

Combining treatment and diagnosis,called theranostics,which is achieved within single nanoparticle is an ultimate goal of many ***,we developed a new nanotheranostic agent-Nd^(3+)-sensitized upconversion nanoparticles core for dual modal imaging(i.e.,upconversion luminescence imaging and magnetic resonance imaging) and antimony nanoshell for photothermal therapy(PTT).The core-shellshell upconversion nanoparticles(NaYF_(4):Yb,Er@NaYF_(4):Yb,Nd@NaGdF_(4):Nd,named as UCNP) were firstly synthesized using thermal decomposition method and then were coated by antimony shell over the surface of UCNP using simple cost and time effective new ***,the surface of UCNP@Sb nanostructures was modified with DSPE-PEG in order to enhance the water solubility and *** final nanotheranostic agent,named as UCNP@Sb-PEG,exhibits very low toxicity,good biocompatibility,very good photothermal therapeutic effect,and efficient upconversion luminescence(UCL) imaging of HeLa cells under only one laser(808 nm) *** antimony shell is quenching the upconversion emission in pristine nanotheranostic agent,but interestingly,the UCL intensity of the agent recovers progressively under 808 nm laser irradiation due to light induced degradability of antimony ***,high longitudinal relaxivity(r_(1)) obtained from the experiment approves excellent potential of the nanotheranostic agent for T_(1)-weighted magnetic resonance imaging application.

关键词： Rare earths Upconversion luminescence Nanotheranostic agent Antimony shell Bioimaging Photothermal therapy

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Upconversion FRET quantitation:the role of donor photoexcitation mode and compositional architecture on the decay and intensity based responses

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Light(Science & Applications) 2022年第10期11卷 2321-2334页

作者： Agata Mkotulska Aleksandra Pilch-WrÓbel Satu Lahtinen Tero Soukka artur bednarkiewicz Division of Biomedical Physicochemistry Institute of Low Temperature and Structure ResearchPANul.Okolna 2Wroclaw 50-422Poland Department of Life Technologies/Biotechnology University of TurkuKiinamyllynkatu 1020520 TurkuFinland

Lanthanide-doped colloidal nanoparticles capable of photon upconversion(UC)offer long luminescence lifetimes,narrowband absorption and emission spectra,and efficient anti-Stokes *** features are highly advantageous for F?rster Resonance Energy Transfer(FRET)based *** nanoparticles(UCNPs)as donors may solve the existing problems of molecular FRET systems,such as photobleaching and limitations in quantitative analysis,but these new labels also bring new *** we have studied the impact of the core-shell compositional architecture of upconverting nanoparticle donors and the mode of photoexcitation on the performance of UC-FRET from UCNPs to Rose Bengal(RB)molecular *** have quantitatively compared luminescence rise and decay kinetics of Er3+emission using core-only NaYF4:20%Yb,2%Er and core-shell NaYF4:20%Yb@NaYF4:20%Yb,5%Er donor UCNPs under three photoexcitation schemes:(1)direct short-pulse photoexcitation of Er3+at 520 nm;indirect photoexcitation of Er3+through Yb3+sensitizer with(2)980 nm short(5-7 ns)or(3)980 nm long(4 ms)laser *** donor luminescence kinetics and steady-state emission spectra differed between the UCNP architectures and excitation *** for highly sensitive kinetic upconversion FRET-based biomolecular assays,the experimental results underline the complexity of the excitation and energy-migration mechanisms affecting the Er3+donor responses and suggest ways to optimize the photoexcitation scheme and the architecture of the UCNPs used as luminescent donors.

关键词： excitation donor decay

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Biofunctionalized upconverting CaF2：Yb,Tm nanoparticles for Candida albicans detection and imaging

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Nano Research 2017年第10期10卷 3333-3345页

作者： Malgorzata Misiak Michal Skowicki Tomasz Lipinski Agnieszka Kowalczyk Katarzyna Prorok Sebastian Arabasz artur bednarkiewicz Wroctaw Research Centre EIT+ ul. Stablowicka 147 54-066 Wroclaw Poland Insitute of Immunology and Experimental Therapy Polish Academy of Sciences ul. Rudolfa Weigla 12 53-114 Wroctaw Poland Centre of Polymer and Carbon Materials Polish Academy of Sciences M. Curie-Sklodowskiej 34 41-819 Zabrze Poland Institute of Low Temperature and Structure Research Polish Academy of Sciences ul. Okolna 2 50-422 Wroctaw Poland

Versatile optimization of the synthesis method and composition of Yb^3＋ and Tm^3＋ co-doped CaF2 nanoparticles as well as a novel biofunctionalization method were developed and evaluated. Through multistep synthesis, the luminescence intensity of the Tm3. activator was enhanced by more than 10-fold compared to standard one-step synthesis. The proposed methods were used to homogenously distribute the doping ions within the nanoparticle＇s volume and thus reduce luminescence quenching. Optimization of dopant ions concentration led to the selection of the most efficient visible and near-infrared up-converting nanoparticles, which were CaF2 doped with 10% Yb^3＋ 0.05% Tm^3＋ and 20% Yb3. 0.5% Tm^3＋, respectively. To illustrate the suitability of the synthesized nanoparticles as bio-labels, a dedicated biofunctionalization method was used, and the nanoparticles were applied for labeling and imaging of Candida albicans cells. This method shows great promise because of extremely low background and high specificity because of the presence of the attached molecules.

关键词： up-conversion luminescence nanomaterials fluoride nanoparticles bioimaging

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