Results 121 to 130 of about 31,053 (258)

A Label‐Free Ultraviolet Photoacoustic Microscopy Enables Nuclear Imaging and Toxicity Assessment in an Intact Brain Organoid

open access: yesSmall, EarlyView.
Ultraviolet photoacoustic microscopy enables label‐free visualization of nuclear morphology in intact human brain organoids. By exploiting endogenous nucleic acid absorption at 266 nm, this approach resolves individual nuclei without staining or sectioning.
Hyunjun Kye   +5 more
wiley   +1 more source

Rounded Monodisperse Fluorescent Nanodiamonds

open access: yesSmall, EarlyView.
Nanodiamond (ND) shape control using rapid molten‐nitrate etching is studied as a scale‐up method for monodispersed rounded particles. Optimal etching condition (567°C for 6 min) yields NDs with atomically stepped surfaces and reduced sp2 content. Compared to angular control, rounded NDs exhibit an increased proportion of luminescent particles (66% vs.
Helena Raabova   +7 more
wiley   +1 more source

Material Extrusion‐Enabled Soft Multimodal Pressure Sensors With Fabrication‐Embedded Stretch‐Induced Strain Insensitivity

open access: yesSmall, EarlyView.
Material extrusion‐based additive manufacturing integrates mechanically anisotropic electrospun piezoelectric composite microfibers with stretchable silver electrodes into a three‐dimensional serpentine architecture to realize stretch‐induced strain‐insensitive pressure sensors, maintaining a stable sensing performance under tensile strains up to 30 ...
Jinsheng Fan   +7 more
wiley   +1 more source

An integrated AI-enabled system using One Class Twin Cross Learning for early gastric cancer detection. [PDF]

open access: yesFront Oncol
Liu XX   +12 more
europepmc   +1 more source

Microfluidic Sample Compartmentalization for Biomolecular Concentration Quantification Using a Nanopore Sensor

open access: yesSmall Methods, EarlyView.
We compartmentalize samples into picoliter volumes using a microfluidic device, allowing us to determine biomolecular concentration by counting molecules to depletion within a known volume without calibration. By integrating a nanopore sensor for this counting process, we also obtain real‐time data on the size, shape, and conformation of each ...
Morteza Safari   +5 more
wiley   +1 more source

Single‐Nanoparticle Detection Using Quasi‐Bound States in the Continuum Supported by Silicon Metasurfaces

open access: yesSmall Methods, EarlyView.
This study demonstrates the detection of virus‐sized single polystyrene particles in water by leveraging the ultrahigh‐Q nature of low‐contrast bound states in the continuum (BIC) metasurfaces. The resonance properties of silicon BIC metasurfaces—wavelength, linewidth, and amplitude—all exhibit single‐particle sensitivity, representing a unique sensing
Keisuke Watanabe   +4 more
wiley   +1 more source

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