Inorganic carbon nanomaterials, also called nanodots, exhibit a strong photoluminescence with unusual properties and, thus, have been the focus of intense research. Nonetheless, origin their is still unclear and subject scientific debates. Here, we present single particle comprehensive study nanodot photoluminescence, which combines emission lifetime spectroscopy, defocused dipole imaging, azimuthally polarized excitation scanning, nanocavity-based quantum yield measurements, high resolution...

Ferroelectricity in ZnO is an unlikely physical phenomenon. Here, we show ferroelectricity undoped [001] nanorods due to zinc vacancies. Generation of a nanorod effectively increases its piezoelectricity and turns the into ultrahigh-piezoelectric material. Here using piezoelectric force microscopy (PFM), it observed that increasing frequency AC excitation electric field decreases effective d33. Subsequently, existence reversible permanent dipole also found from P–E hysteresis loop nanorods....

Investigating nonlinear fluid dynamics remains a challenge across physics from nanofluidics and biophysics to astrophysics. Here we introduce quantum/classical theoretical approach that takes into account both quantum correlations classical behaviour within 2D is confined in 3 μm side square. We employ modified Gross-Pitaevskii equation, encompassing many-body interactions confinement. This system reveals complex characterised by dissipative solitons; significant outcome an asymptotic...

Abstract We report microstructures of SU-8 photo-sensitive polymer with high-aspect-ratio, which is defined as the ratio height to in-plane feature size. The highest aspect achieved in this work exceeds 250. A multi-layer and single-photon lithography approach used expose photoresist thickness up 100 μm. Here, time-lapsed writing key concept that enables nanometer localised controlled photo-induced polymerisation. use a converging monochromatic laser beam 405 nm wavelength controllable...

Mechanical properties of nanocrystals are influenced by atomic defects. Here, we demonstrate the effect planar defects on mechanics ZnO nanorods using force microscopy, high-resolution transmission electron and large-scale atomistic simulation. We study two different conditionally grown single nanorods. One contains extended I1-type stacking fault (SF) another is defect free. The SF containing show buckling behaviors with reduced critical loading, whereas other kinds linear elastic behavior....

Investigating nonlinear fluid dynamics remains a challenge across physics from nanofluidics and biophysics to astrophysics. Here we introduce quantum/classical theoretical approach that takes into account both quantum correlations classical behaviour within 2D is confined in 3 μm side square. We employ modified Gross-Pitaevskii equation, encompassing many-body interactions confinement. This system reveals complex characterised by dissipative solitons; significant outcome an asymptotic...

A single-molecule nanofluidic detection method resolving fundamental limit of molecular shot noise along with 1D manipulation sub-3 nm sized single molecules – a potential application for early COVID-19, cancer and protein misfolding.

We demonstrate a basal stacking fault induced localised quantum well with single degenerate-transition-dipole in undoped ZnO nanorods using defocused optical wide-field microscopy.

Luminescent carbon nanodots (CND) are a recent addition to the family of nanostructures. Interestingly, large group CNDs fluorescent in visible spectrum and possess single dipole emitters with potential applications super-resolution microscopy, quantum information science, optoelectronics. There is diversity CND's size as well strong variability edge topology functional groups real samples. This hampers direct comparison experimental theoretical findings that necessary understand unusual...

Investigating the intricacies of confined nonlinear dynamics presents formidable challenges, primarily due to unpredictable behaviour molecular constituents. This study introduces a promising avenue for comprehending and harnessing within constrained domains, with broad applications spanning fields like nanofluidics astrophysics. Quantum-level control emerges as powerful tool, enabling manipulation classical systems achieve specific outcomes, including quantum fluidic at nanoscale...

Here, we present a comprehensive study of self-driven flow dynamics at the liquid-gas interface within nanofluidic pores in absence external driving forces. The investigation focuses on Rayleigh-Taylor instability phenomena that occur sub-100 nm scale fluidic interfacing between 2 μm water and air reservoir. We obtain velocity equation, validate it using simulations, concentrating mass transfer efficiency these structures. Furthermore, introduce concept─"active solid-state nanopore"─that...

We report high aspect-ratio micromechanical structures made of SU-8 polymer, which is a negative photoresist. Mask-less direct writing with 405 nm laser used to pattern spin-cast films thickness more than 600 um. As compared X-ray lithography, helps material give aspect ratios 1:50 or higher, less expensive and accessible alternative. In this work, up 1:30 were obtained on narrow pillars cantilever structures. Deep vertical patterning was achieved in multiple exposures the surface varying...

Self-driven nanofluidic flow at the liquid-air interface is a non-intuitive phenomenon. This behaviour was not driven by classical pressure difference or evaporation only. Depending on position of pore we can observe and no-flow with chaotic behaviour. In this paper, study nonlinear dynamics confined nanopore system interface. The finite-range interactions between interacting species are quantified corresponding critical velocity system. visualised using finite element method analysed...

While the education systems largely remain knowledge oriented and artificial intelligence started exploding to be used in education, this paper reviews Tagorean Theory of sustainable human development substantiate cognitive symmetry breaking by combining creativity with that builds on legacy Rabindranath Tagore. The theory followed a rigorous process empirical analysis, theoretical reflection, statistical simulation. We analysed current state research, economic several countries identify...

Mesoscopic persistent current phenomena have sought significant attention, initially observed in metal micro-ring structures at cryogenic temperatures and subsequently nanoparticles room temperature. This paper explores the underlying physics of this intriguing phenomenon potential explanations proposed by various research groups. Specifically, we focus on two major theoretical approaches, each shedding light unique characteristics mesoscopic currents. The first approach draws upon...

We present a study of self-driven flow dynamics at the liquid-gas interface within nanofluidic pores, devoid any external driving forces. The investigation centres on Rayleigh-Taylor instability phenomena occurring in sub-100 nanometre-scale fluidic pores situated micrometer-scale water and air domain. This research rigorously validates our velocity equation using simulation results while delving into mass transfer efficiency these intricate structures. Notably, we introduce concept - an...

A significantly large scope is available for the scientific and engineering developments of high-throughput ultra-high sensitive oxygen sensors. We give a perspective sensing two physical states matters—solid-state nanomaterials plasma. From single-molecule experiments to material selection, we reviewed various aspects sensing, such as capacitance, photophysics, electron mobility, response time, yearly progress. Towards miniaturization, have highlighted benefit lab-on-chip-based devices...

Single-molecule motions in the nanofluidic domain are extremely difficult to characterise because of various complex physical and physicochemical interactions. We present a method for quasi-one-dimensional sub-diffraction-limited fluorescent single molecules using Feynman-Enderlein path integral approach. This theory was validated Monte Carlo simulation provide fundamental understandings single-molecule flow diffusion liquid. The distribution burst size can be precise enough detect molecular...

One major limitation of single-molecule fluorescence spectroscopy is the finite residence time diffusing molecules in confocal detection volume. The ranges order milliseconds. This has typical size femtoliter. Here, we present a concept extending using nanochannels ca. 60 nm x cross-section to restrict molecular motion. We use solid-state silicon and dioxide. work aimed for dual-focus combining Anti-Brownian ELectrophoretic or ABEL trap actively single molecule.

Disease or damage to articular cartilage is major problem of medical science. In this paper we have demonstrated a novel preliminary attempt analyze surface characteristics with noncontact method. We utilized Environmental Scanning Electron Microscope (ESEM) obtain the morphology lower femoral head Bovine sp. at nanoscale. Surface roughness has been computed from ESEM images three dimensional reconstruction tomography.