scholarly journals Molecular Magnetic Materials on Solid Surfaces

2009 ◽  
Author(s):  
Matteo Mannini
Keyword(s):  
Data Storage ◽  
Single Molecule ◽  
Scanning Probe Microscopy ◽  
Organic Radicals ◽  
Solid Surfaces ◽  
Scanning Probe ◽  
Metallic Surfaces ◽  
Single Molecule Magnets ◽  
Tailored Approach ◽  
Phd Thesis

This PhD thesis summarises a study of the nanostructuration of single molecule magnets and organic radicals on metallic surfaces, carried out by the author in collaboration with a number of research groups in Italy, France, Germany and Israel. A tailored approach was followed to graft individual molecules to the surface, to characterise the morphology of the functionalised surfaces with standard scanning probe microscopy and to investigate their magnetic properties using X-Ray circular dichroism. The aim of this project was to develop the initial basis for the organisation and addressing of magnetic molecules with a view to the development of single molecule devices for data storage and molecular-spintronic applications.

Cationic Polyacrylamide Conformation on Mica Studied by Single Molecule “Pulling” with Scanning Probe Microscopy

2007 ◽  
Vol 40 (13) ◽  
pp. 4561-4567 ◽  
Author(s):  
Brett Brotherson ◽  
Lawrence A. Bottomley ◽  
Peter Ludovice ◽  
Yulin Deng
Keyword(s):  
Single Molecule ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Probe Microscopy ◽  
Cationic Polyacrylamide

Anisotropic acoustic phonon polariton-enhanced infrared spectroscopy for single molecule detection

Nanoscale ◽  
2021 ◽  
Author(s):  
wei Lv ◽  
hanchao Teng ◽  
chenchen Wu ◽  
Xiaotao Zhang ◽  
Xiangdong Guo ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Single Molecule ◽  
Scanning Probe Microscopy ◽  
Acoustic Phonon ◽  
Fourier Transforms ◽  
High Spatial Resolution ◽  
Scanning Probe ◽  
Surface Species ◽  
Composition And Structure ◽  
Fourier Transforms Infrared Spectroscopy

Nanoscale Fourier transforms infrared spectroscopy (nano-FTIR) based on scanning probe microscopy enables identification of chemical composition and structure of surface species with a high spatial resolution (~10 nm), which is...

scholarly journals Vibrational Coherences in Manganese Single-molecule Magnets after Ultrafast Photoexcitation

2018 ◽  
Author(s):  
Florian Liedy ◽  
Robbie McNab ◽  
Julien Eng ◽  
Ross Inglis ◽  
Thomas Penfold ◽  
...  
Keyword(s):  
Data Storage ◽  
Single Molecule ◽  
Optical Data Storage ◽  
Transient Absorption Spectroscopy ◽  
Optical Data ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Single Molecule Magnets ◽  
Teller Distortion ◽  
Jahn Teller

<p>Single-Molecule Magnets (SMMs) are metal complexes with two degenerate magnetic ground states arising from a non-zero spin ground state and a zero-field splitting. SMMs are promising for future applications in data storage, however, to date the ability to manipulate the spins using optical stimulus is lacking. Here, we have explored the ultrafast dynamics occurring after photoexcitation of two structurally related Mn(III)-based SMMs, whose magnetic anisotropy is closely related to the Jahn-Teller distortion, and demonstrate coherent modulation of the axial anisotropy on a femtosecond timescale. Ultrafast transient absorption spectroscopy in solution reveals oscillations superimposed on the decay traces with corresponding energies around 200 cm<sup>−1</sup>, coinciding with a vibrational mode along the Jahn-Teller axis. Our results provide a non-thermal, coherent mechanism to dynamically control the magnetisation in SMMs and open up new molecular design challenges to enhance the change in anisotropy in the excited state, which is essential for future ultrafast magneto-optical data storage devices.</p>

Basic Study on High-density Ferroelectric Data Storage Using Scanning Nonlinear Dielectric Microscopy

2002 ◽  
Vol 748 ◽  
Author(s):  
Yoshiomi Hiranaga ◽  
Kenjiro Fujimoto ◽  
Yasuo Wagatsuma ◽  
Yasuo Cho ◽  
Atsushi Onoe ◽  
...  
Keyword(s):  
Data Storage ◽  
Scanning Probe Microscopy ◽  
High Density ◽  
Scanning Probe ◽  
Ferroelectric Polarization ◽  
Domain Formation ◽  
Basic Study ◽  
Polarization Distribution ◽  
Nonlinear Dielectric ◽  
Probe Microscopy

ABSTRACTScanning Nonlinear Dielectric Microscopy (SNDM) is the method for observing ferroelectric polarization distribution, and now, its resolution has become to the sub-nanometer order, which is much higher than other scanning probe microscopy (SPM) methods for the same purpose. Up to now, we have studied high-density ferroelectric data storage using this microscopy. In this study, we have conducted fundamental experiments of nano-sized inverted domain formation in LiTaO3 single, and successfully formed inverted dot array with the density of 1.5 Tbit/inch2.

Developments in Using Scanning Probe Microscopy To Study Molecules on Surfaces — From Thin Films and Single-Molecule Conductivity to Drug–Living Cell Interactions

2006 ◽  
Vol 59 (6) ◽  
pp. 359 ◽  
Author(s):  
Pall Thordarson ◽  
Rob Atkin ◽  
Wouter H. J. Kalle ◽  
Gregory G. Warr ◽  
Filip Braet
Keyword(s):  
Single Molecule ◽  
Scanning Probe Microscopy ◽  
Cell Interactions ◽  
Scanning Probe ◽  
Probe Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Tunnelling Microscopy ◽  
Molecule Surface

Scanning probe microscopy (SPM) techniques, including atomic force microscopy (AFM) and scanning tunnelling microscopy (STM), have revolutionized our understanding of molecule–surface interactions. The high resolution and versatility of SPM techniques have helped elucidate the morphology of adsorbed surfactant layers, facilitated the study of electronically conductive single molecules and biomolecules connected to metal substrates, and allowed direct observation of real-time processes such as in situ DNA hybridization and drug–cell interactions. These examples illustrate the power that SPM possesses to study (bio)molecules on surfaces and will be discussed in depth in this review.

Large Deflection 3DOF Piezoelectric Microrobotic Manipulator With Positional Sensing and Self-Calibration

2012 ◽  
Author(s):  
Xing Jin ◽  
Jason V. Clark
Keyword(s):  
Dynamic Response ◽  
Frequency Response ◽  
Range Of Motion ◽  
Data Storage ◽  
Scanning Probe Microscopy ◽  
Large Deflection ◽  
Scanning Probe ◽  
Large Deflections ◽  
Self Calibration ◽  
Aqueous Environments

In this paper, we propose a large deflection piezoelectric microrobotic manipulator with the ability to self-calibrate displacement and sense its position. Such a manipulator should be applicable to scanning probe microscopy, nanolithography, data storage, biological probing in murky aqueous environments, and the like. Previous devices for such applications are limited in dexterity, range of motion, frequency response, positional calibration, or require environmental cleanliness. Our device has a three novel attributes, which are: an ability to achieve large deflections with greater than one degree of freedom (DOF); an ability to self-calibrate it displacement; and an ability to sense its position after actuation or prescribed displacement. Through simulation we demonstrate independent 3 DOF motional control (validated experimentally), positional sensing and self-calibration, and dynamic response.

Control of MEMS Nanopositioners With Nano-Scale Resolution

2006 ◽  
Author(s):  
Jason J. Gorman ◽  
Yong-Sik Kim ◽  
Nicholas G. Dagalakis
Keyword(s):  
Data Storage ◽  
Scanning Probe Microscopy ◽  
Dynamic Models ◽  
Beam Steering ◽  
Open Loop ◽  
Experimental Results ◽  
Scanning Probe ◽  
Flexure Mechanism ◽  
Nano Scale ◽  
Ultra Precision

Several approaches for the precision control of micro-scale positioning mechanisms, or MEMS nanopositioners, are presented along with initial experimental results which demonstrate nano-scale positioning resolution. The MEMS nanopositioners discussed in this paper are novel precision mechanisms comprised of a bent-beam thermal actuator and a flexure mechanism for each degree of freedom (DOF). These mechanisms can be used for a host of ultra-precision positioning applications, including nanomanipulation, scanning probe microscopy, high-density data storage and beam steering arrays. Concentrating on a 1 DOF MEMS nanopositioner, empirical static and dynamic models have been derived using characterization data obtained from experiments with optical and laser probe microscopes. Based on these models, three control approaches have been developed: 1) a quasi-static nonlinear open-loop controller, 2) a nonlinear forward compensator, and 3) a nonlinear PI controller. Simulation and initial experimental results are presented, and the benefits of each of these approaches are discussed.

Sign in / Sign up

Export Citation Format

Share Document