Surface-enhanced Raman scattering (SERS) probes based on a charge transfer (CT) process with high stability and reproducibility are powerful tools under open-air conditions. However, the key problem ahead of practical usage of CT-based SERS technology is how to effectively improve sensitivity. Here, a novel ternary heterostructure SERS substrate, Fe3O4@GO@TiO2, with a significant enhancement factor of 8.08 × 106 was first synthesized. We found the remarkable enhanced effect of SERS signal to be attributed to the resonance effect of CuPc, CT between GO and TiO2, and enrichment from a porous TiO2 shell. In addition, we developed a robust SERS probe with good recyclability under visible light illumination on Fe3O4@GO@TiO2 nanocomposites toward ultrasensitive detection of cancer cells down to three cells. We have now successfully applied this probe for in situ quantification and imaging of programmed cell death receptor ligand 1 (PD-L1) on triple-negative breast cancer cell surface at the single-cell level and for monitoring the expression variation of PD-L1 during drug treatment.

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At the Best Western, The Concord Singers will play at 2 p.m., followed by the Bockfest boys at 3:15 p.m. The Concord Singers return to the stage at 6:30 p.m., followed by The Wendinger Band at 8 p.m.

The frock embodied pure elegance, featuring a gathered center and floor-sweeping skirt along with full peasant sleeves. 

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A chunk of the mineral malachite, used to make the pigment Malachite Green, sits beneath a portrait of Mark Rothko taken by Herbert Matter and borrowed from the New York Public Library’s picture collection. The red spectrum is a reference to Rothko’s Harvard murals, in which the Lithol Red has faded.

”If New Zealand got too expensive we would see a decline in visitor numbers and a demand drop off. You would assume that pricing has not reached a point of no return yet but it is something we are very mindful of,” England-Hall said.

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And in the pain and anxiety of losing. But another ambiguous innovation – medical, followed by recreational – marijuana will be around to soothe the discomfort.

In addition to his parents he was preceded in death by his first wife, Dorothy Brock Williams and his second wife, Joyce Hall Williams and a son, Billy Joe Williams.

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