A5026403991- Quantum Dots Synthesis And Properties
- Advanced Nanomaterials in Catalysis
- Microbial Fuel Cells and Bioremediation
- Advanced biosensing and bioanalysis techniques
- Advanced X-ray Imaging Techniques
- Carbon and Quantum Dots Applications
- Advanced Photocatalysis Techniques
- Nanoparticles: synthesis and applications
- Selenium in Biological Systems
- Advanced Electron Microscopy Techniques and Applications
- Mercury impact and mitigation studies
- Nanoplatforms for cancer theranostics
- Luminescence Properties of Advanced Materials
- Membrane Separation Technologies
- Biosensors and Analytical Detection
- Electrochemical sensors and biosensors
- Perovskite Materials and Applications
- Geochemistry and Elemental Analysis
- Heavy Metal Exposure and Toxicity
- Inorganic Fluorides and Related Compounds
- Nanocluster Synthesis and Applications
- Nanoparticle-Based Drug Delivery
- Mass Spectrometry Techniques and Applications
- Laser-Plasma Interactions and Diagnostics
- Medical Imaging Techniques and Applications
National Synchrotron Radiation Laboratory
2020-2025
University of Science and Technology of China
2016-2025
CAS Key Laboratory of Urban Pollutant Conversion
2016-2021
Hefei University
2019-2020
Beijing Jiaotong University
2014-2015
The biotic–abiotic photosynthetic system integrating inorganic light absorbers with whole-cell biocatalysts innovates the way for sustainable solar-driven chemical transformation. Fundamentally, electron transfer at interface, which may induce biological response to photoexcited stimuli, plays an essential role in solar energy conversion. Herein, we selected electro-active bacterium Shewanella oneidensis MR-1 as a model, constitutes hybrid self-assembled CdS semiconductor, demonstrate unique...
Mercury (Hg), as a highly harmful environmental pollutant, poses severe ecological and health risks even at low concentrations. Accurate sensitive methods for detecting Hg2+ ions in aquatic environments are needed. In this work, we developed fluorescence sensor detection with an integrated use of biosynthetic CdSe/CdS quantum dots (QDs) liposome carrier signal amplification. To construct such sensor, three single-stranded DNA probes were rationally designed based on the thymine-Hg2+-thymine...
Understanding the spatial orientation of nanoparticles and corresponding subcellular architecture events favors uncovering fundamental toxic mechanisms predicting response pathways organisms toward environmental stressors. Herein, we map location label-free citrate-coated Ag (Cit-AgNPs) reorganization in microalgae by a noninvasive 3D imaging approach, cryo-soft X-ray tomography (cryo-SXT). Cryo-SXT near-natively displays maps Cit-AgNPs presenting rarely identified sites, namely,...
Abstract Biotic-abiotic hybrid photocatalytic system is an innovative strategy to capture solar energy. Diversifying energy conversion products and balancing photoelectron generation transduction are critical unravel the potential of photocatalysis. Here, we harvest in a dual mode for Cu 2-x Se nanoparticles biomineralization seawater desalination by integrating merits Shewanella oneidensis MR-1 biogenic nanoparticles. Photoelectrons generated extracellular 0 power synthesis through two...
Although oxygen has been reported to regulate biofilm formation by several Shewanella species, the exact regulatory mechanism mostly remains unclear. Here, we identify a direct oxygen-sensing diguanylate cyclase (DosD) and reveal its role in putrefaciens CN32 under aerobic conditions. In vitro vivo analyses revealed that activity of DosD culminates synthesis cyclic (c-di-GMP) presence oxygen. regulates transcription bpfA operon which encodes seven proteins including large repetitive adhesin...
Biofabrication of nanomaterials is currently constrained by a low production efficiency and poor controllability on product quality compared to chemical synthetic routes. In this work, we show an attractive new biosynthesis system break these limitations. A directed selenium-containing nanoparticles in Shewanella oneidensis MR-1 cells, with fine-tuned composition subcellular location, was achieved modifying the extracellular electron transfer chain. By taking advantage its untapped...
Biosynthesis offers opportunities for cost-effective and sustainable production of semiconductor quantum dots (QDs), but is currently restricted by poor controllability on the synthesis process, resulting from limited knowledge assembly mechanisms lack effective control strategies. In this work, we provide molecular-level insights into formation mechanism biogenic QDs (Bio-QDs) its connection with cellular substrate metabolism in Escherichia coli. Strengthening producing more reducing power...
In this paper, Nd3+-Yb3+-Er3+-doped β-NaYF₄ nanocrystals with different Nd3+ concentrations are synthesized, and the luminescence properties of upconversion nanoparticles (UCNPs) have been studied under 808-nm excitation for sensitive biological applications. The spectra NaYF₄ dopants proves that ion can absorb photons effectively, Yb3+ play role an energy-transfer bridging between Er3+ ion. To investigate effect ion, decay curves ⁴S3/2 → ⁴I15/2 transition at 540 nm measured analyzed. NaYF₄:...
Analysis of cellular ultrastructure dynamics and metal ions' fate can provide insights into the interaction between living organisms ions. Here, we directly visualize distribution biogenic metallic aggregates, ion-induced subcellular reorganization, corresponding regulation effect in yeast by near-native 3D imaging approach, cryo-soft X-ray tomography (cryo-SXT). By comparative morphometric assessment, observe gold ions disrupting organelle homeostasis, resulting noticeable distortion...
FeS nanoparticles were self-assembled by Shewanella oneidensis MR-1, and the biosynthesis yield rate can be regulated regulating precursor content. The resulting Bio-FeS exhibit excellent in vivo therapeutic performance.
The biotransformation of heavy metals in the environment is usually affected by co-existing pollutants like selenium (Se), which may lower ecotoxicity metals, but underlying mechanisms remain unclear. Here, we shed light on pathways copper (Cu2+) and selenite (SeO32–) synergistic biodetoxification Shewanella oneidensis MR-1 illustrate how such processes are anthraquinone-2,6-disulfonate (AQDS), an analogue humic substances. We observed formation selenide nanoparticles (Cu2–xSe) from...
Summary Soft X‐ray microscopy has excellent characteristics for imaging cells and subcellular structures. In this paper, the yeast strain, Candida utilis , was imaged by soft three‐dimensional volumes were reconstructed with SART‐TV method. We performed segmentation on reconstruction in three dimensions identified several types of architecture within specimen based their linear absorption coefficient (LAC) values. Organelles can be correlation between LAC values architectures. Quantitative...
Antagonism between heavy metal and selenium (Se) could significantly affect their biotoxicity, but little is known about the mechanisms underlying such microbial-mediated antagonistic processes as well formed products. In this work, we examined cadmium (Cd)-Se interactions fates in Caenorhabditis elegans through vivo vitro analysis elucidated machinery of Se-stimulated Cd detoxification. Although Se introduction induced up to 3-fold higher bioaccumulation C. than Cd-only group, nematode...
Solar-energy-facilitated CdS<sub>x</sub>Se<sub>1−x</sub> quantum dots with an elongated fluorescence lifetime and fast synthesis rate.
Biotransformation of selenite to valuable elemental selenium nanoparticles (Se0) is a promising avenue remediate seleniferous environments and simultaneously recover (Se). However, the underlying oxyanion competition transformation mechanism in prokaryotes are poorly understood. In this work, impacts phosphate on uptake were elucidated with Escherichia coli its mutant deficient transport as model microbial strains. Selenite was inhibited by E. coli. Moreover, internalized Se shifted from Se0...
X-ray Talbot-Lau interferometer, offering multi-contrast for the imaged objects, has shown powerful capacity in imaging biological soft tissues, low density materials, etc. However, length of system is constant, which limits its applications. Here, we establish a new interferometer theory to achieve flexible phase contrast system. This tunable length-scale scattering sensitivity. The experiments show that can regulate signal individually. Furthermore, construct G2-less based on this validate...