HIGHLY REPRODUCIBLE SINGLE POLYANILINE NANOWIRE USING ELECTROPHORESIS METHOD

NANO ◽  
2008 ◽  
Vol 03 (02) ◽  
pp. 75-82 ◽  
Author(s):  
INNAM LEE ◽  
HO IL PARK ◽  
SEONGYONG PARK ◽  
MOON J. KIM ◽  
MINHEE YUN
Keyword(s):  
Electrical Conductivity ◽  
Growth Process ◽  
Site Specific ◽  
Post Process ◽  
Polyaniline Nanowires ◽  
Electrophoresis Method ◽  
Polymer Nanowires

Site-specific single polyaniline nanowires were fabricated through electrophoresis growth with acetone wetting. After growing the nanowires, the post-process of acetone wetting of the nanowires improved morphology, topology, and electrical conductivity with coagulation and substitution in polyaniline. They showed resistance changes of 39.57 ± 11.57% and presented 2.38 × 10-4 ± 3 × 10-5 Ω · cm, 133.77 ± 13.82 nm thickness, and 133.17 ± 13.01 nm width in 1 μm to 5.5 μm length. The new combined growth process of electrophoresis and acetone wetting significantly improved reproducibility, reliability, and controllability in the fabrication of single polymer nanowires.

Electrochemically Fabricated Conducting Polymer Nanoframework Electrode Junctions That Function as Resistive Sensors

2004 ◽  
Vol 828 ◽  
Author(s):  
Hsian-Rong Tseng ◽  
Jun Wang ◽  
Maksudul M. Alam
Keyword(s):  
Aqueous Solutions ◽  
Conducting Polymer ◽  
Electrochemical Method ◽  
Chemical Sensing ◽  
Organic Vapors ◽  
Site Specific ◽  
Ph Values ◽  
Template Free ◽  
Polymer Nanowires

ABSTRACTWe have demonstrated a template-free, site-specific, and scalable electrochemical method for the fabrication of individually addressable conducting polymer nanoframework electrode junctions in a parallel-oriented array. These conducting polymer nanoframeworks, which are composed of numerous intercrossing conducting polymer nanowires that have uniform diameters ranging from 40 to 150 nm, can be used for the chemical sensing of HCl and NH3 gases and organic vapors and for sensing pH values of aqueous solutions.

Study of Growth Process for YBa2Cu3Oy Coated Conductors With BaZrO 3 Flux Pinning Centers by Monitoring Electrical Conductivity

2018 ◽  
Vol 28 (4) ◽  
pp. 1-5 ◽  
Author(s):  
Ryo Teranishi ◽  
Kazuki Konya ◽  
Masayoshi Inoue ◽  
Yukio Sato ◽  
Kenji Kaneko ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Flux Pinning ◽  
Growth Process ◽  
Coated Conductors ◽  
Pinning Centers

scholarly journals Site-Specific Management Zones Based on Soil Electrical Conductivity in a Semiarid Cropping System

2003 ◽  
Vol 95 (2) ◽  
pp. 303 ◽  
Author(s):  
Cinthia K. Johnson ◽  
David A. Mortensen ◽  
Brian J. Wienhold ◽  
John F. Shanahan ◽  
John W. Doran
Keyword(s):  
Electrical Conductivity ◽  
Cropping System ◽  
Soil Electrical Conductivity ◽  
Site Specific ◽  
Management Zones ◽  
Specific Management

Delineation of management zones with measurements of soil apparent electrical conductivity in the southeastern pampas

2013 ◽  
Vol 93 (2) ◽  
pp. 205-218 ◽  
Author(s):  
Nahuel Raúl Peralta ◽  
José Luis Costa ◽  
Mónica Balzarini ◽  
Hernán Angelini
Keyword(s):  
Electrical Conductivity ◽  
Soil Properties ◽  
Stepwise Regression ◽  
Clay Soil ◽  
Crop Yields ◽  
Management Strategies ◽  
Site Specific ◽  
Management Zones ◽  
Apparent Electrical Conductivity ◽  
Specific Management

Peralta, N. R., Costa, J. L., Balzarini, M. and Angelini, H. 2013. Delineation of management zones with measurements of soil apparent electrical conductivity in the southeastern pampas. Can. J. Soil Sci. 93: 205–218. Site-specific management demands the identification of subfield regions with homogeneous characteristics (management zones). However, determination of subfield areas is difficult because of complex correlations and spatial variability of soil properties responsible for variations in crop yields within the field. We evaluated whether apparent electrical conductivity (ECa) is a potential estimator of soil properties, and a tool for the delimitation of homogeneous zones. ECamapping of a total of 647 ha was performed in four sites of Argentinean pampas, with two fields per site composed of several soil series. Soil properties and ECawere analyzed using principal components (PC)–stepwise regression and ANOVA. The PC–stepwise regression showed that clay, soil organic matter (SOM), cation exchange capacity (CEC) and soil gravimetric water content (θg) are key loading factors, for explaining the ECa(R2≥0.50). In contrast, silt, sand, extract electrical conductivity (ECext), pH values and [Formula: see text]-N content were not able to explain the ECa. The ANOVA showed that ECameasurements successfully delimited three homogeneous soil zones associated with spatial distribution of clay, soil moisture, CEC, SOM content and pH. These results suggest that field-scale ECamaps have the potential to design sampling zones to implement site-specific management strategies.

scholarly journals Low-Input Estimation of Site-Specific Lime Demand Based on Apparent Soil Electrical Conductivity and In Situ Determined Topsoil pH

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5280
Author(s):  
Moritz von Cossel ◽  
Harm Druecker ◽  
Eberhard Hartung
Keyword(s):  
Electrical Conductivity ◽  
Field Measurements ◽  
Ex Situ ◽  
Soil Electrical Conductivity ◽  
Standard Equipment ◽  
Site Specific ◽  
Input Estimation ◽  
Low Input ◽  
North Germany

Site-specific liming helps increase efficiency in agricultural production. For adequate determination of the lime demand, a combination of apparent soil electrical conductivity (ECa) and topsoil pH can be used. Here, it was hypothesized that this can also be done at low-input level. Field measurements using the EM38 MK I (Geonics, Canada) were conducted on three experimental sites in north Germany in 2011. The topsoil pH was measured based on two approaches: on the field using a handheld pH meter (Spectrum-Technologies Ltd., Bridgend, UK) with a flat electrode (in situ), and in the lab using standard equipment (ex situ). Both soil ECa (0.4–35.9 mS m−1) and pH (5.13–7.41) were heterogeneously distributed across the sites. The same was true of the lime demand (−1.35–4.18 Mg ha−1). There was a significant correlation between in situ and ex situ determined topsoil pH (r = 0.89; p < 0.0001). This correlation was further improved through non-linear regression (r = 0.92; p < 0.0001). Thus, in situ topsoil pH was found suitable for map-overlay with ECa to determine the site-specific lime demand. Consequently, the hypothesis could be confirmed: The combined use of data from EM38 and handheld pH meters is a promising low-input approach that may help implement site-specific liming in developing countries.

Modeling of the PVT Growth Process of Bulk 3C-SiC - Growth Process Development and Challenge of the Right Materials Data Base

2019 ◽  
Vol 963 ◽  
pp. 157-160 ◽  
Author(s):  
Michael Schöler ◽  
Philipp Schuh ◽  
Johannes Steiner ◽  
Peter J. Wellmann
Keyword(s):  
Electrical Conductivity ◽  
Growth Process ◽  
Process Development ◽  
Vapor Transport ◽  
Physical Vapor Transport ◽  
Temperature Dependency ◽  
Free Standing ◽  
Growth Interface ◽  
Materials Properties ◽  
The Right

We report on the modeling of the temperature field and supersaturation in front of the SiC crystal growth interface of a physical vapor transport growth configuration. The data are compared with experimental results, like the growth of free standing 3C-SiC wafers with a diameter of 50 mm and a thickness of 870 µm. Special emphases is put on the precise handling of the materials properties which include the temperature dependency of the heat and electrical conductivity of the graphite parts at temperatures above 2000 °C.

scholarly journals Electrical Conductivity Studies on Individual Conjugated Polymer Nanowires: Two-Probe and Four-Probe Results

2009 ◽  
Vol 5 (1) ◽  
pp. 237-242 ◽  
Author(s):  
Yun Ze Long ◽  
Jean Luc Duvail ◽  
Meng Meng Li ◽  
Changzhi Gu ◽  
Zongwen Liu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conjugated Polymer ◽  
Polymer Nanowires

scholarly journals Establishing management zones using soil electrical conductivity and other soil properties by the fuzzy clustering technique

2008 ◽  
Vol 65 (6) ◽  
pp. 567-573 ◽  
Author(s):  
José Paulo Molin ◽  
Cesar Nunes de Castro
Keyword(s):  
Electrical Conductivity ◽  
Soil Fertility ◽  
Soil Properties ◽  
Precision Agriculture ◽  
Principal Component ◽  
Site Specific ◽  
Management Zones ◽  
Physical Attributes ◽  
Definition Of ◽  
Specific Management

The design of site-specific management zones that can successfully define uniform regions of soil fertility attributes that are of importance to crop growth is one of the most challenging steps in precision agriculture. One important method of so proceeding is based solely on crop yield stability using information from yield maps; however, it is possible to accomplish this using soil information. In this study the soil was sampled for electrical conductivity and eleven other soil properties, aiming to define uniform site-specific management zones in relation to these variables. Principal component analysis was used to group variables and fuzzy logic classification was used for clustering the transformed variables. The importance of electrical conductivity in this process was evaluated based on its correlation with soil fertility and physical attributes. The results confirmed the utility of electrical conductivity in the definition of management zones and the feasibility of the proposed method.

Electrochemical Dip-Pen Nanolithography of Conductive Wires

2005 ◽  
Vol 901 ◽  
Author(s):  
Fapei Zhang ◽  
Ryo Yamada ◽  
Hirokazu Tada
Keyword(s):  
Atomic Force Microscope ◽  
Line Width ◽  
Chemically Modified ◽  
Atomic Force ◽  
Different Types ◽  
Polyaniline Nanowires ◽  
Coating Methods ◽  
Polymer Nanowires ◽  
Dip Pen Nanolithography

AbstractWe have explored the fabrication of conductive nanowires on different types of substrates by electrochemistry-assisted DPN (E-DPN) with an atomic force microscope. Various parameters of E-DPN were examined systematically including the effects of coating methods and the types of the tips on the electrodeposition behavior. It was found that a chemically-modified Si AFM tip is very suitable for E-DPN. Platinum and polyaniline nanowires with a line width of ca.100 nm to sub- 100 nm were prepared on the metallic (Au) and semiconducting (Si) surfaces. The parameters indispensable for E-DPN of metal and polymer nanowires on an insulating SiO2 surface will also be discussed.

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