Journal ArticleDOI
Label-Free, Quantitative Imaging of MoS2-Nanosheets in Live Cells with Simultaneous Stimulated Raman Scattering and Transient Absorption Microscopy
Lili Zhang,Sida Shen,Zhuang Liu,Minbiao Ji +3 more
- Vol. 1, Iss: 4, pp 1700013
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TLDR
A dual‐modal SRS/TA microscopy technique is developed to provide a general solution for investigating a large variety of nanomaterials that absorb light but do not fluoresce and different sized MoS2 nanosheets are found to have distinct uptake dynamics as well as transient photocarrier dynamics.Abstract:
Probing nanoparticle-cell interactions in vivo plays a key role in the research and development of nanomedicine and nano-biophotonics. However, simultaneously imaging nanoparticles and intracellular biomolecules in a label-free manner has been a challenge, especially for the majority of nanoparticles that do not emit one- or two-photon excited fluorescence. In this work, a strong optical transient absorption (TA) signal is observed for synthesized MoS2 nanosheets that could be used for sensitive and quantitative imaging of their intracellular distributions. Furthermore, a dual-modal microscopy technique is developed to simultaneously image MoS2 with TA microscopy and cellular lipids/proteins with stimulated Raman scattering (SRS) microscopy. This technique is based on precise pulse engineering and dual-phase lock-in detection. Its capability to quantify the uptake dynamics of MoS2 into live HeLa cells is demonstrated and the colocalization of MoS2 nanosheets with intracellular lipid rich organelles is observed. Different sized MoS2 nanosheets are found to have distinct uptake dynamics as well as transient photocarrier dynamics. These results indicate that dual-modal SRS/TA microscopy may provide a general solution for investigating a large variety of nanomaterials that absorb light but do not fluoresce.read more
Citations
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Journal ArticleDOI
Biological interactions of biocompatible and water-dispersed MoS 2 nanosheets with bacteria and human cells.
Jasneet Kaur,Manjot Singh,Carmela Dell'Aversana,Rosaria Benedetti,Paola Giardina,Manuela Rossi,Mohammadhassan Valadan,Alessandro Vergara,Anna Cutarelli,Angela Michela Immacolata Montone,Lucia Altucci,Federica Corrado,Angela Nebbioso,Carlo Altucci +13 more
TL;DR: High-quality, few-layered and defect-free MoS2 nanosheets, exfoliated and dispersed in pure water, stabilized up to three weeks are produced and cytotoxic effect induced in the tumor cell lines is absent in the normal cells in the tested conditions.
Journal ArticleDOI
Cellular Imaging Using Stimulated Raman Scattering Microscopy
Andrew H. Hill,Dan Fu +1 more
TL;DR: The theoretical background and experimental implementation of SRS microscopy are discussed, and recent developments in the field of cellular imaging with SRS are highlighted and summarized.
Journal ArticleDOI
Instant diagnosis of gastroscopic biopsy via deep-learned single-shot femtosecond stimulated Raman histology
TL;DR: In this article , a single-shot femtosecond SRS (femto-SRS) was used for gastric cancer diagnosis with preserved chemical resolution by integrating with U-Net, revealing essential histoarchitectural hallmarks perfectly agreed with standard histopathology.
Journal ArticleDOI
Rapid, 3D Chemical Profiling of Individual Atmospheric Aerosols with Stimulated Raman Scattering Microscopy
TL;DR: Zhang et al. as discussed by the authors proposed an ORCID identification number for the author(s) of this article, which can be found under https://doi.org/10.1002/smtd.
Journal ArticleDOI
Transient absorption microscopy: Technological innovations and applications in materials science and life science.
Yifan Zhu,Ji-Xin Cheng +1 more
TL;DR: The recent instrumental advancement that is pushing the limit of spatial resolution, detection sensitivity, and imaging speed is reviewed and the emerging application in materials science and life science is highlighted.
References
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Journal Article
Breaking the diffraction resolution limit by stimulated emission: stimulated-emission-depletion fluorescence microscopy
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TL;DR: In this paper, the authors proposed a new type of scanning fluorescence microscope capable of resolving 35 nm in the far field by employing stimulated emission to inhibit the fluorescence process in the outer regions of the excitation point spread function.
Journal ArticleDOI
Label-free biomedical imaging with high sensitivity by stimulated raman scattering microscopy
Christian W. Freudiger,Wei Min,Brian G. Saar,Sijia Lu,Gary R. Holtom,Chengwei He,Jason C. Tsai,Jing X. Kang,X. Sunney Xie +8 more
TL;DR: Three-dimensional multiphoton vibrational imaging technique based on stimulated Raman scattering (SRS) is reported, which offers background-free and readily interpretable chemical contrast in biomedical imaging and shows a variety of biomedical applications.
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Drug Delivery with PEGylated MoS2 Nano‐sheets for Combined Photothermal and Chemotherapy of Cancer
Teng Liu,Chao Wang,Xing Gu,Hua Gong,Liang Cheng,Xiaoze Shi,Liangzhu Feng,Baoquan Sun,Zhuang Liu +8 more
TL;DR: MoS2 nanosheets functionalized with poly-ethylene glycol are for the first time used as a multifunctional drug delivery system with high drug loading capacities achieving excellent synergistic anti-tumor effect upon systemic administration.
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Size-dependent optical properties of colloidal PbS quantum dots.
Iwan Moreels,Karel Lambert,Dries Smeets,David De Muynck,Tom Nollet,José C. Martins,Frank Vanhaecke,André Vantomme,Christophe Delerue,Guy Allan,Zeger Hens +10 more
TL;DR: At high energies, the molar extinction coefficient epsilon increases with the Qdot volume d(3) and agrees with theoretical calculations using the Maxwell-Garnett effective medium theory and bulk values for the Q dot dielectric function.
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