Search results for "NEMS"

Fabrication and Characterization of Double- and Single-Clamped CuO Nanowire Based Nanoelectromechanical Switches

2021

Electrostatically actuated nanoelectromechanical (NEM) switches hold promise for operation with sharply defined ON/OFF states, high ON/OFF current ratio, low OFF state power consumption, and a compact design. The present challenge for the development of nanoelectromechanical system (NEMS) technology is fabrication of single nanowire based NEM switches. In this work, we demonstrate the first application of CuO nanowires as NEM switch active elements. We develop bottom-up and top-down approaches for NEM switch fabrication, such as CuO nanowire synthesis, lithography, etching, dielectrophoretic alignment of nanowires on electrodes, and nanomanipulations for building devices that are suitable f…

Resonance assisted jump-in voltage reduction for electrostatically actuated nanobeam-based gateless NEM switches.

2019

Electrostatically actuated nanobeam-based electromechanical switches have shown promise for versatile novel applications, such as low power devices. However, their widespread use is restricted due to poor reliability resulting from high jump-in voltages. This article reports a new method for lowering the jump-in voltage by inducing mechanical oscillations in the active element during the switching ON process, reducing the jump-in voltage by more than three times. Ge0.91Sn0.09 alloy and Bi2Se3 nanowire-based nanoelectromechanical switches were constructed in situ to demonstrate the operation principles and advantages of the proposed method.

Sequence type 101 (ST101) as the predominant carbapenem-non-susceptible Klebsiella pneumoniae clone in an acute general hospital in Italy.

2012

Klebsiella pneumoniae is one of the most common multidrug-resistant (MDR) Gram-negative organisms worldwide, responsible for high morbidity and mortality both in hospitals and alternative healthcare settings. Recently, increasing use of carbapenems has promoted the emergence and dissemination of carbapenem-non-susceptible MDR K. pneumoniae strains. All of the CNSKP strains isolated between January 2009 and December 2011 in the General Hospital of Prato (Prato, Italy) were studied. Our findings indicate that, unlike previously reported by other authors from different regions of Italy, K. pneumoniae producing KPC-2 and belonging to ST101 have been established in the area of Prato, Tuscany, It…

Is the monoclonal spread of the ST258, KPC-3-producing clone being replaced in southern Italy by the dissemination of multiple clones of carbapenem-n…

2015

D. M. Geraci, C. Bonura, M. Giuffre, L. Saporito, G. Graziano, A. Aleo, T. Fasciana, F. Di Bernardo, T. Stampone, D. M. Palma and C. Mammina 1) Department of Sciences for Health Promotion and Mother-Child Care ‘G. D’Alessandro’, University of Palermo, 2) Postgraduate Specialty School in Hygiene and Preventive Medicine, University of Palermo, 3) Laboratory of Microbiology, General Hospital ARNAS ‘Civico, Di Cristina & Benfratelli’, 4) Laboratory of Microbiology, General Hospital Azienda Ospedaliera ‘Villa Sofia-V, Cervello’ and 5) II Intensive Care Unit, General Hospital ARNAS ‘Civico, Di Cristina & Benfratelli’, Palermo, Italy

Multiclonal emergence of carbapenem-resistant Klebsiella pneumoniae in Tuscany, Italy

2010

Targeting the Class A Carbapenemase GES-5 via Virtual Screening

2020

The worldwide spread of &beta

Modello numerico per la caratterizzazione elettromeccanica dei nanotubi di carbonio

2016

Nell’ultimo decennio i nanotubi di carbonio (Carbon nanotubes, CNTs) hanno suscitato un considerevole interesse nella comunità scientifica internazionale a causa delle loro proprietà meccaniche, bassa densità ed elevata conducibilità termica. I CNT possiedono inoltre peculiari proprietà elettroniche dipendenti da elicoicità e stato di deformazione, rendendoli potenziali elementi costruttivi di una nuova tecnologia nano-elettronica. Numerosissimi dispositivi elettronici basati sui CNTs (transistors, nano-switches, attuatori, ecc.) sono già stati realizzati. Un nuovo approccio è stato sviluppato per investigare la deformazione dei CNTs e si basa su modelli agli elementi finiti accuratamente s…

Antimicrobial de-escalation in the critically ill patient and assessment of clinical cure : the DIANA study

2020

© 2020 The Author(s).

Human Amnion-Derived Mesenchymal Stromal Cells: A New Potential Treatment for Carbapenem-Resistant Enterobacterales in Decompensated Cirrhosis

2022

Background: Spontaneous bacterial peritonitis (SBP) is a severe and often fatal infection in patients with decompensated cirrhosis and ascites. The only cure for SBP is antibiotic therapy, but the emerging problem of bacterial resistance requires novel therapeutic strategies. Human amniotic mesenchymal stromal cells (hA-MSCs) possess immunomodulatory and anti-inflammatory properties that can be harnessed as a therapy in such a context. Methods: An in vitro applications of hA-MSCs in ascitic fluid (AF) of cirrhotic patients, subsequently infected with carbapenem-resistant Enterobacterales, was performed. We evaluated the effects of hA-MSCs on bacterial load, innate immunity factors, and macr…

Analytical Solutions of Viscoelastic Nonlocal Timoshenko Beams

2022

A consistent nonlocal viscoelastic beam model is proposed in this paper. Specifically, a Timoshenko bending problem, where size- and time-dependent effects cannot be neglected, is investigated. In order to inspect scale phenomena, a stress-driven nonlocal formulation is used, whereas to simulate time-dependent effects, fractional linear viscoelasticity is considered. These two approaches are adopted to develop a new Timoshenko bending model. Analytical solutions and application samples of the proposed formulation are presented. Moreover, in order to show influences of viscoelastic and size effects on mechanical response, parametric analyses are provided. The contributed results can be usefu…