scholarly journals Диэлектрические и сегнетоэлектрические свойства тонких гетероэпитаксиальных пленок SBN-50

2021 ◽  
Vol 63 (6) ◽  
pp. 776
Author(s):  
А.В. Павленко ◽  
Д.А. Киселев ◽  
Я.Ю. Матяш
Keyword(s):  
Scanning Probe Microscopy ◽  
Film Surface ◽  
Scanning Probe ◽  
Dielectric Parameters ◽  
Cathode Sputtering ◽  
Force Microscopy ◽  
Ferroelectric Relaxors ◽  
Ferroelectric Domains ◽  
Average Size ◽  
Potential Signal

The phase transformations and ferroelectric characteristics of thin heteroepitaxial barium-strontium niobate SBN-50 films grown by RF cathode sputtering in an oxygen atmosphere were studied using dielectric spectroscopy and scanning probe microscopy (in the modes of force microscopy of the piezoresponse and Kelvin modes). It is shown that the films are characterized by a low surface roughness, an average size of ferroelectric domains of ~ 100 nm, and spontaneous polarization directed from the substrate to the film surface. Differences in the magnitude of the surface potential signal and its relaxation for the regions polarized at +10 V and –10 V were established. The nature of the change in the dielectric parameters in the temperature range T = 275–500 K indicates that the material belongs to ferroelectric relaxors. The reasons for the established regularities are discussed.

SCANNING PROBE MICROSCOPY BASED NANOSCALE PATTERNING AND FABRICATION

COSMOS ◽  
2007 ◽  
Vol 03 (01) ◽  
pp. 1-21 ◽  
Author(s):  
XIAN NING XIE ◽  
HONG JING CHUNG ◽  
ANDREW THYE SHEN WEE
Keyword(s):  
Integrated Circuits ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Force Microscopy ◽  
Nanoscale Patterning ◽  
Atomic Force ◽  
Probe Microscope ◽  
Molecular Manipulation

Nanotechnology is vital to the fabrication of integrated circuits, memory devices, display units, biochips and biosensors. Scanning probe microscope (SPM) has emerged to be a unique tool for materials structuring and patterning with atomic and molecular resolution. SPM includes scanning tunneling microscopy (STM) and atomic force microscopy (AFM). In this chapter, we selectively discuss the atomic and molecular manipulation capabilities of STM nanolithography. As for AFM nanolithography, we focus on those nanopatterning techniques involving water and/or air when operated in ambient. The typical methods, mechanisms and applications of selected SPM nanolithographic techniques in nanoscale structuring and fabrication are reviewed.

Measurement of Plasticity Gradients with Scanning Probe Microscopy

1993 ◽  
Vol 318 ◽  
Author(s):  
James D. Kiely ◽  
Dawn A. Bonnell
Keyword(s):  
Fracture Surface ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Scanning Tunneling ◽  
Ceramic System ◽  
Force Microscopy ◽  
Metal Fracture ◽  
Atomic Force ◽  
Metal Ceramic

ABSTRACTScanning Tunneling and Atomic Force Microscopy were used to characterize the topography of fractured Au /sapphire interfaces. Variance analysis which quantifies surface morphology was developed and applied to the characterization of the metal fracture surface of the metal/ceramic system. Fracture surface features related to plasticity were quantified and correlated to the fracture energy and energy release rate.

scholarly journals The memory effect of nanoscale memristors investigated by conducting scanning probe microscopy methods

2012 ◽  
Vol 3 ◽  
pp. 722-730 ◽  
Author(s):  
César Moreno ◽  
Carmen Munuera ◽  
Xavier Obradors ◽  
Carmen Ocal
Keyword(s):  
Memory Effect ◽  
Scanning Probe Microscopy ◽  
Electrical Characterization ◽  
Scanning Force Microscopy ◽  
Scanning Probe ◽  
Force Microscopy ◽  
Versatile Tool ◽  
Scanning Force ◽  
Memristor Device

We report on the use of scanning force microscopy as a versatile tool for the electrical characterization of nanoscale memristors fabricated on ultrathin La0.7Sr0.3MnO3 (LSMO) films. Combining conventional conductive imaging and nanoscale lithography, reversible switching between low-resistive (ON) and high-resistive (OFF) states was locally achieved by applying voltages within the range of a few volts. Retention times of several months were tested for both ON and OFF states. Spectroscopy modes were used to investigate the I–V characteristics of the different resistive states. This permitted the correlation of device rectification (reset) with the voltage employed to induce each particular state. Analytical simulations by using a nonlinear dopant drift within a memristor device explain the experimental I–V bipolar cycles.

Block Copolymer Microdomain Morphologies by Phase Detection Imaging

1996 ◽  
Vol 461 ◽  
Author(s):  
Ph. Leclère ◽  
J. M. Yu ◽  
R. Lazzaroni ◽  
Ph. Dubois ◽  
R. JéRôme ◽  
...  
Keyword(s):  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Phase Detection ◽  
Surface Phase ◽  
Force Microscopy ◽  
Microscopy Technique ◽  
Atomic Force ◽  
Different Types ◽  
Microdomain Structure ◽  
Thermodynamic Processes

ABSTRACTAtomic Force Microscopy with Phase Detection Imaging is used to study the surface microdomain morphology of thick (i.e., ca. 2 mm) films of triblock copolymers, such as polymethylmethacrylate - block - polybutadiene - block - polymethylmethacrylate copolymers prepared by a well-taylored two-step sequential copolymerization promoted by a 1,3-diisopropenylbenzene based difunctional anionie initiator. By means of this new scanning probe microscopy technique, it is shown that the surface exhibits a segregated microphase structure, corresponding to the different types of components predicted theoretically by thermodynamic processes. We investigate the relationships between the size and characteristics of the microdomain structure as a function of the molecular parameters of the constituent polymers. Our data illustrate the interest of Phase Detection Imaging in the elucidation of surface phase separation in block copolymers.

Creep, Hysteresis, and Vibration Compensation for Piezoactuators: Atomic Force Microscopy Application

1999 ◽  
Vol 123 (1) ◽  
pp. 35-43 ◽  
Author(s):  
D. Croft ◽  
G. Shed ◽  
S. Devasia
Keyword(s):  
High Precision ◽  
Scanning Probe Microscopy ◽  
High Speed ◽  
Scanning Probe ◽  
Optical Systems ◽  
Positioning Precision ◽  
Force Microscopy ◽  
Atomic Force ◽  
Vibration Compensation ◽  
Adverse Affects

This article studies ultra-high-precision positioning with piezoactuators and illustrates the results with an example Scanning Probe Microscopy (SPM) application. Loss of positioning precision in piezoactuators occurs (1) due to hysteresis during long range applications, (2) due to creep effects when positioning is needed over extended periods of time, and (3) due to induced vibrations during high-speed positioning. This loss in precision restricts the use of piezoactuators in high-speed positioning applications like SPM-based nanofabrication, and ultra-high-precision optical systems. An integrated inversion-based approach is presented in this article to compensate for all three adverse affects—creep, hysteresis, and vibrations. The method is applied to an Atomic Force Microscope (AFM) and experimental results are presented that demonstrate substantial improvements in positioning precision and operating speed.

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.

Fabrication and Use of Atomically Smooth Steps on 6H-SiC for Calibration of z-Displacements in Scanning Probe Microscopy

2010 ◽  
Vol 645-648 ◽  
pp. 767-770 ◽  
Author(s):  
Sergey P. Lebedev ◽  
P.A. Dement’ev ◽  
Alexander A. Lebedev ◽  
V.N. Petrov ◽  
Alexander N. Titkov
Keyword(s):  
Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
High Temperature Annealing ◽  
Structured Surfaces ◽  
Force Microscopy ◽  
Atomic Force ◽  
Annealing Procedure ◽  
Test Objects

Atomic-force microscopy and scanning tunnel electron microscopy have been used to study the surface of single-crystal 6H-SiC (0001) substrates subjected to step-by-step high-temperature annealing in vacuum. An annealing procedure leading to surface structuring by atomically smooth steps with heights of 0.75 and 1.5 nm has been found. It is suggested to use the structured surfaces as test objects for z-calibration of scanning probe microscopes.

scholarly journals Nanomechanical Probing With Scanning Force Microscopy

2001 ◽  
Vol 9 (1) ◽  
pp. 8-15 ◽  
Author(s):  
V. V. Tsukruk ◽  
V. V. Gorbunov
Keyword(s):  
Scanning Probe Microscopy ◽  
Scanning Force Microscopy ◽  
Scanning Probe ◽  
Static Force ◽  
Local Surface ◽  
Materials Properties ◽  
Force Microscopy ◽  
Nanomechanical Properties ◽  
Scanning Force ◽  
Magnetic And Electric Properties

Highly localized probing of surface nanomechanical properties with a submicron resolution can be accomplished with scanning probe microscopy (SPM). The SPM ability to probe local surface topography in conjunction with mechanical, adhesive, friction, thermal, magnetic, and electric properties is unique.1 However, the quantitative probing of the nanomechanical materials properties is still a challenge and only a few examples have been published to date.In this note, we briefly review the latest developments in the nanomechanical probing of compliant materials (predominantly polymers). We solely focus our analysis of SPM-based approach in a so-called static force spectroscopy (SFS) mode.

scholarly journals Исследование пленок диметилдиимида перилентетракарбоновой кислоты методами циклической термодесорбции и сканирующей зондовой микроскопии

2018 ◽  
Vol 60 (2) ◽  
pp. 255
Author(s):  
А.Е. Почтенный ◽  
А.Н. Лаппо ◽  
И.П. Ильюшонок
Keyword(s):  
Atomic Force Microscopy ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Scanning Tunneling ◽  
Bandgap Width ◽  
Kelvin Probe ◽  
Tunneling Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Probe Spectroscopy

AbstractSome results of studying the direct-current (DC) conductivity of perylenetetracarboxylic acid dimethylimide films by cyclic oxygen thermal desorption are presented. The microscopic parameters of hopping electron transport over localized impurity and intrinsic states were determined. The bandgap width and the sign of major current carriers were determined by scanning probe microscopy methods (atomic force microscopy, scanning probe spectroscopy, and photoassisted Kelvin probe force microscopy). The possibility of the application of photoassisted scanning tunneling microscopy for the nanoscale phase analysis of photoconductive films is discussed.

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