Article
Chemistry, Multidisciplinary
Esmaeil Heydari, Javad AmirAhmadi, Nahid Ghazyani, Gongxun Bai, Hossein Zare-Behtash, MohammadHossein MajlesAra
Summary: We developed a nanophotonic sensor that can be excited in the NIR spectrum for real-time oxygen detection in water and air. By analyzing the photoluminescence lifetime and intensity, we combined lanthanide-doped upconversion nanoparticles with a PtTFPP platinum porphyrin complex in a polystyrene matrix to achieve 68% efficient excitation of the PtTFPP molecules with a 980 nm NIR laser. We reported for the first time the oxygen sensitivity of the upconversion nanoparticles alone and demonstrated a more than 10-fold improvement in sensitivity by adding PtTFPP oxygen-sensitive molecules. Additionally, we investigated the functionality of the sensor and its performance compared to a sensor exposed to direct excitation at 410 nm. Furthermore, we implanted the sensor under the skin of a chicken and found that the PL intensity was amplified more than 12 times using the 980 nm excitation laser, opening up possibilities for the development of implantable oxygen sensor platforms.
Article
Chemistry, Multidisciplinary
Jotaro Honda, Kosuke Sugawa, Seiya Fukumura, Ryuzi Katoh, Hironobu Tahara, Joe Otsuki
Summary: The distance dependence of triplet-triplet annihilation upconversion (TTA-UC) systems remains unexplored. This study investigated the influence of the spatial distance between Ag nanoprisms (AgPRs) and TTA-UC thin films on UC emission. The optimal distance was found to be significantly longer than typical metal-enhanced fluorescence systems. The UC emission enhancement was affected by factors such as PdOEP photoexcitation rate, triplet-triplet energy transfer efficiency, DPA lifetime, and fluorescence efficiency.
Article
Chemistry, Multidisciplinary
Xiumei Chen, Jinyu Wan, Minmin Wei, Zhengyu Xia, Jie Zhou, Min Lu, Ze Yuan, Ling Huang, Xiaoji Xie
Summary: In this study, a tandem fabrication strategy for the preparation of UCNP-based nanocomposites is reported. Protons confined in the non-aqueous polar solvent can produce ligand-free UCNPs for direct fabrication without further treatment. The versatile strategy enables a simple and scalable fabrication of UCNP-based nanocomposites and can be extended to other nanomaterial-based composites.
Article
Biochemistry & Molecular Biology
Juan Ferrera-Gonzalez, Laura Frances-Soriano, Cristina Galiana-Rosello, Jorge Gonzalez-Garcia, Maria Gonzalez-Bejar, Eleonore Froehlich, Julia Perez-Prieto
Summary: Research demonstrates that upconversion nanoparticles coated with cucurbit[7]uril (CB[7]) show no cytotoxicity or endotoxin contamination in endothelial cells for biological applications. However, higher cytotoxicity is observed in other cell types, possibly due to differences in lysosome content and particle uptake rate.
Review
Chemistry, Analytical
Anara Molkenova, Hye Eun Choi, Jeong Min Park, Jin-Ho Lee, Ki Su Kim
Summary: Lanthanide-based upconversion nanoparticles (UCNPs) have attracted scientists' attention for their ability to convert tissue-penetrating near-infrared light into tailored optical illumination inside biological matter. These luminescent UCNPs have been widely used for background-free biorecognition and biosensing. Maximizing NIR light harvesting and upconversion efficiencies while protecting biological tissue is a challenge for laser-assisted photoactivation, and this review provides an overview of recent achievements and challenges in plasmon-modulated upconversion nanoformulations for biosensing applications.
Article
Chemistry, Multidisciplinary
Hong Wang, Yang Xu, Tao Pang, Baojiu Chen, Fangyun Xin, Mingming Xing, Meng Tian, Yao Fu, Xixian Luo, Ying Tian
Summary: A novel Er3+-sensitized core-shell-shell upconversion nanostructure with a Yb3+-enriched core has been designed to achieve highly efficient NIR II emission. The design allows for efficient trapping and locking of excitation energy, leading to enhanced emission and high quantum yield. This functional design provides potential for practical applications in bio-imaging and anti-counterfeiting.
Article
Chemistry, Multidisciplinary
Mingkai Wang, Hanlin Wei, Shuai Wang, Chuanyu Hu, Qianqian Su
Summary: This study focused on developing lanthanide-doped nanocrystals with efficient ultraviolet emission for applications in drug release, photocatalysis, photodynamic therapy, and solid-state lasing. By using a dye-sensitized, heterogeneous core-multishelled lanthanide nanoparticle, the researchers were able to significantly enhance ultraviolet upconversion. Their findings demonstrated a promoted multiphoton upconversion and provided insights into the energy transfer pathway for future developments in ultraviolet-emissive nanohybrids.
Article
Chemistry, Physical
Jaspal Singh, Shrawan Roy, Trang Thu Tran, Sophia Akhtar, Eunji Lee, Jeongyong Kim
Summary: The use of ultrathin nanohybrid films in photocatalytic applications is effective for decomposing pollutants. In this study, ultrathin films composed of Au nanoparticles and Fe2O3 oxy-hydroxides were prepared. These films exhibited outstanding photodecomposition ability and superior photocatalytic activity due to their broad absorption and efficient charge transfer.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Lucia Labrador-Paez, Jouko Kankare, Iko Hyppaenen, Tero Soukka, Elina Andresen, Ute Resch-Genger, Jerker Widengren, Haichun Liu
Summary: The frequency-domain method is an alternative approach to the commonly used time-domain method in characterizing the luminescence kinetics of luminophores. It has the ability to separate multiple lifetime components with higher reliability and accuracy. Although extensively used for down-shifted emission luminophores, its application in studying nonlinear luminescent materials such as lanthanide-doped upconversion nanoparticles has not been explored.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Viktoriia Slynchuk, Christine Schedel, Marcus Scheele, Andreas Schnepf
Summary: This study successfully stabilized halide-terminated Ge nanoparticles with well-defined size distribution through a disproportionation reaction. The stability of the Ge nanoparticles was further tailored by varying the substituent. These nanoparticles can be easily dispersed in organic solvents and possess long-term colloidal stability, making them ideal for thin-film preparation. The results suggest that these nanomaterials have great potential in surface-dependent optical applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Lucia Labrador-Paez, Jouko Kankare, Iko Hyppaenen, Tero Soukka, Elina Andresen, Ute Resch-Genger, Jerker Widengren, Haichun Liu
Summary: The frequency-domain (FD) method is an alternative approach to the time-domain (TD) method for characterizing luminescence kinetics. In this study, the luminescence response of upconversion nanoparticles (UCNPs) was thoroughly analyzed using the FD method, and it was found that the FD method can obtain the effective decay rates of three critical energy states involved in the upconversion process. Experimental data demonstrated the validity of the FD method, showing good agreement with results obtained by TD methods.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Engineering, Biomedical
Yinyan Lin, Yuanfa Yao, Wanmei Zhang, Qiuyu Fang, Luhao Zhang, Yan Zhang, Yingke Xu
Summary: Upconversion-mediated optogenetics utilizes lanthanide upconversion nanoparticles (UCNPs) to indirectly activate traditional optogenetic proteins with near-infrared light, allowing for high spatiotemporal resolution and minimal invasiveness in controlling cell activities in deep tissues and living animals.
ACTA BIOMATERIALIA
(2021)
Article
Chemistry, Physical
Rumeysa Akcapinar, Erdogan Ozgur, Vahabodin Goodarzi, Lokman Uzun
Summary: Upconversion nanoparticles (UCNPs) have been studied for their ability to convert low-energy infrared (IR) photons into high-energy visible photons. In this study, silica-based UCNPs were synthesized using a surface imprinting technique, and magnetic nanoparticles were also synthesized and immobilized with antibodies. A sandwich-like complex was formed between the UCNPs and magnetic nanoparticles, which could be used for recognition, detection, and selective adsorption.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Optics
Yuusuke Takashima, Kentaro Nagamatsu, Masanobu Haraguchi, Yoshiki Naoi
Summary: An ultra-thin perfect absorber for deep ultraviolet light was achieved using an Al/TiO2/AlN system. The TiO2 thickness was optimized to achieve almost perfect light absorption despite the thin film being much thinner than the wavelength. The optimized system demonstrated an average absorption greater than 97% for wavelengths of approximately 255-280 nm at normal light incidence. This structure has the advantage of not requiring nanopatterning processes, making it suitable for low-cost and large-area manufacturing.
Article
Optics
Hui Xu, Sanyang Han, Renren Deng, Qianqian Su, Ying Wei, Yongan Tang, Xian Qin, Xiaogang Liu
Summary: The coordination of bidentate picolinic acid molecules on the surface of nanoparticles can significantly enhance four-photon upconversion, providing new insights into the development of highly emissive nanohybrids. By modulating surface coordination, the reconstruction of orbital energy levels and crystal-field splitting can enhance energy transfer efficiency, offering a new platform for optical interrogation systems at the single-particle level.
Article
Optics
Junjie Wang, Zhixu Jia, Chuanze Zhang, Yan Sun, Yasutake Ohishi, Weiping Qin, Guanshi Qin
Summary: We demonstrated broadband amplification in Tm3+-doped fluorotellurite glass fibers using a 1400/1570 nm dual-wavelength pump technique. The TDFTFs showed positive net gain in the S-band from <1440 nm to 1546 nm, making them promising gain media for constructing efficient broadband S-band fiber amplifiers.
Article
Spectroscopy
Huimin Sun, Xiuting Li, Chenjie Gu, Jinjie Zhang, Guodong Wei, Tao Jiang, Xingfei Zhou
Summary: This study utilized nanoimprint technology to design a quantitative flexible biomimetic surface enhanced Raman scattering (SERS) substrate enabled by internal standard (IS), achieving highly sensitive SERS detection and correcting the quantitative degree with the IS strategy. The research demonstrated the significance of manufacturing highly conformed SERS-active structures from the surface to be tested for achieving the maximum recovery rate.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Materials Science, Multidisciplinary
Yadong Jiao, Fanchao Meng, Zhixu Jia, Q. Guo, Yongsen Yu, Chuantao Zheng, Yasutake Ohishi, Weiping Qin, Guanshi Qin
Summary: In this study, efficient cascaded Raman amplification in fluorotellurite fibers is demonstrated. The results show that fluorotellurite fibers are suitable gain media for constructing cascaded Raman fiber amplifiers with a wide range of wavelengths.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Biophysics
Xiuting Li, Jiali Ma, Yongling Zhang, Lanxin Xu, Chenjie Gu, Guodong Wei, Xiaoling Zhang, Tao Jiang, Jun Zhou
Summary: This study proposes a recyclable immunoassay method utilizing the synergistic effects of electromagnetic and chemical interactions, based on surface-enhanced Raman scattering (SERS) technology, to detect tumor markers in clinical serum samples with high sensitivity. By growing sea-urchin-like gold nanoflowers on two-dimensional red phosphorus nanoplates, efficient enhancement of immunoassay, as well as stable photocatalytic and SERS activities, were achieved. With the combination of a non-metallic immunoprobe, the limit of detection for cancer antigen 19-9 was significantly reduced, demonstrating promising selectivity. These multifunctional red phosphorus/gold nanoflowers have great potential in early cancer detection and point-of-care diagnosis.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Medical Laboratory Technology
Jian Wang, Chong-Chang Zhou, Hong-Cun Sun, Qun Li, Jian-Dao Hu, Tao Jiang, Shao Zhou
Summary: This study establishes a prognostic signature for head and neck squamous cell carcinoma (HNSCC) based on the expression of senescence-associated genes (SAGs), which predicts patient outcome and response to immunotherapy. The results reveal that patients in the high-senescent score group have significantly reduced overall survival and worse clinicopathological characteristics and immunotherapeutic effect. These findings highlight cellular senescence as an important target for HNSCC treatment.
JOURNAL OF CLINICAL LABORATORY ANALYSIS
(2022)
Article
Optics
Siqing Li, Changjian Lv, Hongyu Luo, Linghao Cui, Zhixu Jia, Jianfeng Li, Weiping Qin, Guanshi Qin
Summary: Ultrathin gold nanowires can be used as broadband saturable absorbers for constructing ultra-short pulsed lasers in the near-infrared to mid-infrared range. By inserting the gold nanowire film into fiber laser cavities, stable mode-locked lasers with femtosecond pulse widths at different wavelengths can be achieved.
LASER PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Lingxiao Lu, Lanxin Xu, Yongling Zhang, Tao Jiang
Summary: This study demonstrated the effective monitoring of mixed melamine and dicyandiamide in dairy food using a 3D hybrid SERS substrate, which showed high sensitivity and reliable reproducibility.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Applied
Hao Cui, Zizheng Qin, Haohang Sun, Zhanguo Chen, Weiping Qin
Summary: We demonstrate a method to faithfully excite an ultra-wide bandgap semiconductor hexagonal boron nitride (h-BN) using optical frequency upconversion technology. By using Yb3+ and Tm3+ as dual bridging sensitizers, we successfully excited NaYF4:Yb3+, Tm3+, and Gd3+ microcrystals with near-infrared light and generated high-energy excited states. A photoelectric conversion device was fabricated by attaching the microcrystals to the surfaces of the h-BN thin film. When irradiated with 980nm near-infrared light, the Gd3+ ions in the microcrystals populated high-energy excited states, emitting deep ultraviolet and vacuum ultraviolet fluorescence, providing enough energy for h-BN photoexcitation. Dynamic analysis reveals the important role of Forster resonance energy transfer in optical excitation, with populating Gd3+ ions to high-energy excited states being the key technical step.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Analytical
Rongyan Wang, Jiali Ma, Xing Dai, Yixiao Gao, Chenjie Gu, Tao Jiang
Summary: In this paper, an enhanced SERS chip with high sensitivity was developed by adjusting the heterojunction structure and resonance coupling effect. The chip showed excellent stability and demonstrated promising application feasibility in on-site monitoring of TMTD and MP with low detection limit.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Yanhui Dong, Dan Zhang, Daguang Li, Heng Jia, Weiping Qin
Summary: This study introduces the concepts of critical concentration and time window as the keys to inhibiting Ostwald ripening, and successfully achieves the controllable synthesis of high-quality nanocrystals through precise controls.
SCIENCE CHINA-MATERIALS
(2023)
Article
Computer Science, Information Systems
Tao Jiang, Ming Jin, Qinghua Guo, Ye Tian, Juan Liu
Summary: In cooperative spectrum sensing (CSS), the received signal strengths (RSSs) of multiple secondary users (SUs) are combined to improve sensing performance. Existing CSS schemes often assume RSS levels to be in the same order of magnitude, leading to performance degradation. To address this issue, this letter proposes a graph learning method that selects SUs with similar order of RSS levels using a probability matrix of graph edges. The proposed detector outperforms state-of-the-art detectors according to numerical results.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Article
Biophysics
Rongyan Wang, Huan Liu, Tao Xu, Yongling Zhang, Chenjie Gu, Tao Jiang
Summary: Recently, non-metallic SERS-based immunoassay using mixed-phase magnetic MoS2 and g-C3N4 nanosheets has been developed for the recyclable detection of CA125. The addition of Fe3O4 core promotes the stacking of MoS2 nanoflakes, while the presence of 1T phase enhances the SERS activity. Acid etching converts g-C3N4 to a 2D nanosheet with a high surface area, leading to a significant enhancement factor. The immunosensor shows a limit of detection of 4.96 x 10-4 IU/mL for CA125 and demonstrates great potential in cancer recognition and monitoring.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Analytical
Xinyu Fang, Jiali Ma, Chenjie Gu, Wei Xiong, Tao Jiang
Summary: A flexible SERS substrate based on PDMS combined with Ag NCs and ZIF-67 was developed using a layer-by-layer strategy. The substrate achieved a superhigh enhancement factor through the electromagnetic enhancement from Ag NCs and the chemical enhancement ability of ZIF-67. The substrate was successfully applied to the SERS-based detection of quercetin with an ultra-low LOD, indicating its potential in the direct monitoring of food nutrients.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Physics, Multidisciplinary
Daguang Li, Hao Cui, Guanshi Qin, Weiping Qin
Summary: Under intense light irradiation, pure-white objects exhibit strong light absorption capabilities similar to blackbodies, and generate photon avalanche optical frequency conversion and optical bistable luminescence.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Analytical
Xing Dai, Danni Xue, Xiaohan Liu, Chenjie Gu, Tao Jiang
Summary: Two essential factors in powerful surface-enhanced Raman spectroscopy analysis of trace pesticide residues are high sensitivity and efficient sampling. In this study, a wrinkled structure with abundant nanogaps was formed by a stretched Ag nanowire-tape, leading to appreciable signal enhancement of 4-mercaptobenzoic acid molecules. The Ag NW-tape substrate demonstrated excellent performance in detecting pesticides with high sensitivity, flexibility, and adhesiveness.
ANALYTICAL METHODS
(2023)
