This paper follows our earlier work where a strong high frequency pressure peak has been observed as consequence of the formation shock waves due to collapse cavitation bubbles in water, excited by an ultrasonic source at 24 kHz. We study here effects liquid physical properties on wave characteristics replacing water medium successively with ethanol, glycerol and finally 1:1 ethanol-water solution. The spectra obtained experiments (from more than 1.5 million collapsing events) show that...

Molecular structures appear to be natural candidates for a quantum technology: individual atoms can support superpositions long periods, and such in principle embedded permanent molecular scaffolding form an array. This would true nanotechnology, with dimensions of order nanometre. However, the challenges realizing vision are immense. One must identify suitable elementary unit demonstrate its merits qubit storage manipulation, including input/output. These units then formed into large arrays...

A cyclic porphyrin trimer has been synthesized which a high affinity for fullerenes. It forms 1:1 complexes with C(60) and C(70) association constants of 2 x 10(6) 10(8) M(-1), respectively, in toluene. Its affinities C(86) La@C(82) are too strong to measure by fluorescence titration. The solvent dependence the shows that solvation both guest host influence binding strength.

Liquid Phase Exfoliation (LPE) is an efficient method for graphene flake exfoliation and considered to be compatible with industrial production requirements. However, most of available LPE methods require the use harmful expensive solvents chemical prior mechanical dispersion flakes, therefore additional step needed remove contamination caused by added chemicals, making process complex, costly, unsafe detrimental environment. By studying effects key ultrasonic parameters, our study...

We report transport measurements on a graphene-fullerene single-molecule transistor. The device architecture where functionalized C60 binds to graphene nanoelectrodes results in strong electron-vibron coupling and weak vibron relaxation. Using combined approach of spectroscopy, Raman DFT calculations, we demonstrate center-of-mass oscillations, redox-dependent Franck-Condon blockade, regime characterized by avalanche tunnelling

Over the past few years, healthcare sector is being transformed due to rise of Internet Things (IoT) and introduction Medical (IoMT) technology, whose purpose improvement patient’s quality life. Nevertheless, heterogenous resource-constrained characteristics IoMT networks make them vulnerable a wide range threats. Thus, novel security mechanisms, such as accurate efficient anomaly-based intrusion detection systems (AIDSs), considering inherent limitations networks, need be developed before...

Ultrasonic assisted liquid phase exfoliation (ULPE) is a promising method for the large scale production of 2D materials. Currently, toxic solvents such as N-Methyl-2-pyrrolidone (NMP) are commonly used graphene. In this paper four solvents; three green (water, ethanol and water/ethanol) plus NMP comparison, were sonicated examined in terms their bubble dynamics acoustic emissions. Advanced fundamental analysis was conducted using high-speed imaging synchronised with pressure measurements...

Nowadays, one of the promising methods for scalable graphene production is ultrasound-aided liquid phase exfoliation (ULPE) graphite. Two current limiting factors ULPE are use harmful solutions (such as N-Methyl-2-pyrrolidone or Dimethylformamide) and a relatively low yield. In this study, we demonstrate new dual frequency (20 kHz 1174 kHz) approach in various eco-friendly media, which enabled us to produce few-layer (FLG) high quality. By implementing sophisticated characterisation...

We report the application of SWNTs as templates for forming covalent polymeric chains from C(60)O reacting inside SWNTs; resulting peapod polymer topology is different bulk in that it linear and unbranched.

We examine the temperature dependence of relaxation times molecules N@C60 and N@C70 (which comprise atomic nitrogen trapped within a carbon cage) in liquid CS2 solution. The results are inconsistent with fluctuating zero field splitting (ZFS) mechanism, which is commonly invoked to explain electron spin for S > 1/2 spins solution, mechanism postulated literature these systems. Instead, we find clear Arrhenius N@C60, indicating driven primarily by an Orbach process. For asymmetric molecule,...

Redox flow batteries have the potential to revolutionize our use of intermittent sustainable energy sources such as solar and wind power by storing in liquid electrolytes. Our concept study utilizes a novel electrolyte system, exploiting derivatized fullerenes both anolyte catholyte species series battery cells, including symmetric, single system which alleviates common problem membrane crossover. The prototype multielectron utilizing molecular based charge carriers, made from inexpensive,...

This review presents progress in the field of MIM hosts for ion recognition and sensing since 2014, focusing on synthetic approaches employed mechanisms host–guest binding detection.

Although it was demonstrated that discrete molecular levels determine the sign and magnitude of thermoelectric effect in single-molecule junctions, full electrostatic control these has not been achieved to date. Here, we show graphene nanogaps combined with gold microheaters serve as a testbed for studying thermoelectricity. Reduced screening gate electric field compared conventional metal electrodes allows position dominant transport orbital by hundreds meV. We find power factor...

The powerful electron accepting ability of fullerenes makes them ubiquitous components in biomimetic donor–acceptor systems that model the intermolecular transfer processes Nature's photosynthetic center. Exploiting perylene diimides (PDIs) as cyclic host for noncovalent recognition is unprecedented, part because archetypal PDIs are also deficient, making dyad assembly formation electronically unfavorable. To address this, we report strategic design and synthesis a novel large, macrocyclic...

The application of ultrasound and acoustic cavitation in liquid exfoliation bulk layered materials is a widely used method. However, despite extensive research, the fundamental mechanisms remain far from being fully understood. A number theories have been proposed to interpret interactions between hence explain assisted exfoliation. Unfortunately, most research reported date ambiguous or inconclusive due lack direct real-time experimental evidence. In this paper, we report systematic work...

Ultrasonic cavitation is used in various processes and applications, utilizing powerful shock waves high-speed liquid jets generated by the collapsing bubbles. Typically, a single frequency source to produce desired effects. However, optimization of efficiency ultrasound reactors necessary improve activity specific applications such as for exfoliation two dimensional materials. This research takes next step investigate effect dual transducer system on bubble dynamics, zone, pressure fields,...

By addressing the challenge of controlling molecular motion, mechanically interlocked machines are primed for a variety applications in field nanotechnology. Specifically, designed manipulation communication pathways between electron donor and acceptor moieties that strategically integrated into dynamic photoactive rotaxanes catenanes may lead to efficient artificial photosynthetic devices. In this pursuit, novel [3]rotaxane shuttle consisting four-station bis-naphthalene diimide (NDI)...

Abstract Lead Iodide (PbI 2 ) is a large bandgap 2D layered material that has potential for semiconductor applications. However, atomic level study of PbI monolayer been limited due to challenges in obtaining thin crystals. Here, we use liquid exfoliation produce nanodisks (30-40 nm diameter and > 99% purity) deposit them onto suspended graphene supports enable structure . Strong epitaxial alignment monolayers with the underlying lattice occurs, leading phase shift from 1 T H increase...

Ultrasound-aided liquid phase exfoliation (ULPE) of graphene in pure water is environment-friendly. Two limiting factors ULPE are the non-uniform thickness few-layer (FLG) and a relatively low yield. Here we describe that enables us to produce FLG flakes with 3 layers flake sizes exceeding 1 μm2 just 2 h. This process based on using combination two ultrasound sources high frequencies: 1174 kHz 20 kHz. different frequencies generate wider population size distribution cavitation bubbles act...

Achieving a sustainable production of pristine high-quality graphene and other layered materials at low cost is one the bottlenecks that needs to be overcome for reaching 2D material applications large scale. Liquid phase exfoliation in conjunction with N-methyl-2-pyrrolidone (NMP) recognized as most efficient method both dispersion graphene. Unfortunately, NMP neither nor suitable up-scaling due its adverse impact on environment. Here, we show real potential green solvents by revealing...

Fullerenes have a unique structure, capable of both encapsulating other molecules and reacting with those on the exterior surface. Fullerene derivatives also been found to enormous potential address challenges renewable energy sector current environmental issues, such as in production n-type materials bulk heterojunction solar cells, antimicrobial agents, photocatalytic water treatment processes, sensor technologies. Endohedral metallofullerenes, particular, can possess unpaired electron...