Nanometer-Scale Surface Modification Using the Scanning Probe Microscope:  Progress since 1991

Nyffenegger, R.; Penner, Reginald M.

doi:10.1021/cr960069i

Cited by 244 publications

(198 citation statements)

References 356 publications

(534 reference statements)

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“…Among the various SPM techniques, Scanning Tunneling Microscopy (STM) and Atomic Force Microscopy (AFM) have been extraordinarily useful for obtaining images of the electrode surface directly, also under a controlled polarisation potential [14][15][16][17][18][19]. In particular, AFM and electrochemical AFM have been extensively used in the study of the polymer deposition process at varying the polymerisation conditions, such as type of substrate, solvent, supporting electrolyte, temperature, etc., as well as in the investigation of the polymerisation procedure [20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

In situ atomic force microscopy in the study of electrogeneration of polybithiophene on Pt electrode

Innocenti

Loglio

Pigani

et al. 2005

Electrochimica Acta

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Electrochemical AFM technique has been used for the in situ study of the electrogeneration-deposition process of polybithiophene at varying the polymerisation conditions, such as supporting electrolyte, i.e., LiClO 4 or tetrabutylammonium hexafluorophosphate, and polymerisation procedure, i.e., either potentiostatic or potentiodynamic method. In order to better follow the evolution of the morphology of the deposit, particularly during the early stages of the polymer film growth, a suitable home-made electrochemical cell has been used.

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Section: Introductionmentioning

confidence: 99%

In situ atomic force microscopy in the study of electrogeneration of polybithiophene on Pt electrode

Innocenti

Loglio

Pigani

et al. 2005

Electrochimica Acta

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“…It is difficult to modify metal or semiconductor surfaces on a nanometer scale by optical or electron beam lithography but scanning probe lithography ͑SPL͒ is considered to be a promising tool for solving this difficulty. 1,2 There are two major SPM-based lithography techniques. One is based on a mechanical mechanism that uses an atomic force microscope ͑AFM͒ 3-8 and the other is based on an electrical mechanism that uses a scanning tunneling microscope ͑STM͒.…”

Section: Introductionmentioning

confidence: 99%

Formation and electric property measurement of nanosized patterns of tantalum oxide by current sensing atomic force microscope

Kim¹,

Zhao²,

Uosaki³

2003

Journal of Applied Physics

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Nanosized patterns of tantalum oxide were fabricated on a tantalum substrate by applying a potential pulse utilizing current sensing atomic force microscopy ͑CSAFM͒. The dimensions of the dots were strongly dependent on the bias applied, scan rate, and potential pulse duration. By controlling these variables, the minimum size nanodots with full width at half maximum of 35 nm was achieved. Immediately after pattern formation, the electrical properties of the Ta oxide nanodots were measured using CSAFM. The charge transport at the CSAFM tip and the nanosized Ta oxide dot can be described by Poole-Frenkel type conduction. The relative dielectric constant of the nanosized Ta 2 O 5 dots was calculated to be 17. 8 -24.3, showing that the quality of the oxide was high. In addition, by controlling the substrate bias applied, pulse duration, and tip scan speed, nanosized Ta oxide lines with the desired dimensions were prepared.

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“…Em óptica não-linear, a resposta pode ser frequentemente generalizada pela equação (2). A polarização (t) é então representada por uma série de potências no campo E(t) como:…”

Section: Figura 7 -Estrutura Molecular Do Aminoácidounclassified

“…As quantidades (2) e (3) são conhecidas como as susceptibilidades ópticas não-lineares de segunda e terceira ordem, respectivamente. De uma forma mais simples, assumiremos por enquanto que a polarização depende somente da amplitude instantânea do campo elétrico.…”

Section: Figura 7 -Estrutura Molecular Do Aminoácidounclassified

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Estudo de filmes de Langmuir e Langmuir-Blodgett de aminas anfifílicas utilizando a espectroscopia SFG

Uehara¹

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AgradecimentosPrimeiramente a Deus, por apresentar os melhores caminhos em minha vida, de tal forma que é possível descobrir o fascinante mundo que vivemos, mesmo com um mundo com tantas adversidades.Aos meus familiares, avós, tios e primos, incentivando nos meus estudos, desde o tempo que eu me dedicava a graduação. The study of the interaction of organic molecules with water is of great importance for many areas of science, such as the understanding of biological systems. A large diversity of studies in this area have been performed, however some aspects of the study of thin films of amphiphilic amines have not been satisfactorily clarified. This dissertation focuses on Langmuir films of Octadecylamine as a function of pH and ionic strength of the aqueous subphase, investigating the structure of the organic monolayer and its interaction with water at various degrees of ionization. Sum-Frequency Vibrational Spectroscopy (SFG spectroscopy), a nonlinear optical technique to study surfaces and interfaces, was used in order to investigate the molecular conformation of the Langmuir films, its degree of ionization and the structure of water interacting with the organic monolayer. The monolayer ionization could be monitored by the intensity of the NH 3 + group stretch mode, and it was found that it depends on the local pH at the interface, which in turn is changed by the monolayer ionization and is sensitive to the subphase ionic strength. Water interacts with the monolayer by H bonds with NH 2 /NH 3 + groups, forming a layer with a high degree of orientational order along the surface normal, but relatively disordered regarding the H-bonding network (like in the bulk liquid). The conformation of the alkyl chains depends on the monolayer ionization, being compact and all-trans at high pHs, but more expanded and disordered at low pHs. In addition, Langmuir-Blodgett (LB) films of Octadecylamine were fabricated to compare their structure on the solid substrate to those on the water surface.

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Nanometer-Scale Surface Modification Using the Scanning Probe Microscope: Progress since 1991

Cited by 244 publications

References 356 publications

In situ atomic force microscopy in the study of electrogeneration of polybithiophene on Pt electrode

In situ atomic force microscopy in the study of electrogeneration of polybithiophene on Pt electrode

Formation and electric property measurement of nanosized patterns of tantalum oxide by current sensing atomic force microscope

Estudo de filmes de Langmuir e Langmuir-Blodgett de aminas anfifílicas utilizando a espectroscopia SFG

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