scholarly journals Restraining the Diffusion of Photocarriers to Improve the Spatial Resolution of the Chemical Imaging Sensor

Proceedings ◽  
2017 ◽  
Vol 1 (4) ◽  
pp. 477 ◽  
Author(s):  
Ko-ichiro Miyamoto ◽  
Takeyuki Suto ◽  
Carl Frederik Werner ◽  
Torsten Wagner ◽  
Michael J. Schöning ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Chemical Imaging ◽  
Imaging Sensor

Application of Thin-Film Amorphous Silicon to Chemical Imaging

2006 ◽  
Vol 910 ◽  
Author(s):  
Tatsuo Yoshinobu ◽  
Werner Moritz ◽  
Friedhelm Finger ◽  
Michael J. Schoening
Keyword(s):  
Thin Film ◽  
Amorphous Silicon ◽  
Spatial Resolution ◽  
Glass Substrate ◽  
Chemical Imaging ◽  
Semiconductor Material ◽  
Ion Concentration ◽  
Superior Performance ◽  
Sensing Properties ◽  
Imaging Sensor

AbstractA thin-film amorphous silicon (a-Si) deposited on a glass substrate was employed as a semiconductor material for the chemical imaging sensor, which can visualize the distribution of ion concentration in a solution. The sensing properties and the spatial resolution of the a-Si sensors were investigated. Nearly-Nernstian pH sensitivities and submicron resolution were demonstrated, which suggests the superior performance of the chemical imaging sensor based on thin-film a-Si.

Improved spatial resolution of the chemical imaging sensor with a hybrid illumination that suppresses lateral diffusion of photocarriers

2018 ◽  
Vol 273 ◽  
pp. 1328-1333 ◽  
Author(s):  
Ko-ichiro Miyamoto ◽  
Kosuke Seki ◽  
Takeyuki Suto ◽  
Carl Frederik Werner ◽  
Torsten Wagner ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Lateral Diffusion ◽  
Chemical Imaging ◽  
Imaging Sensor

scholarly journals Enhancement of the Spatial Resolution of the Chemical Imaging Sensor by a Hybrid Fiber-Optic Illumination

2014 ◽  
Vol 87 ◽  
pp. 612-615 ◽  
Author(s):  
K. Miyamoto ◽  
K. Seki ◽  
Y. Guo ◽  
T. Wagner ◽  
M.J. Schöning ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Fiber Optic ◽  
Chemical Imaging ◽  
Hybrid Fiber ◽  
Imaging Sensor

Generalized Heterodyne Configurations for Photo-induced Force Microscopy

2019 ◽  
Author(s):  
Le Wang ◽  
Devon Jakob ◽  
Haomin Wang ◽  
Alexis Apostolos ◽  
Marcos M. Pires ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Repetition Rate ◽  
Modulation Frequency ◽  
High Harmonic ◽  
Chemical Imaging ◽  
Heterodyne Detection ◽  
Force Microscopy ◽  
Wide Range ◽  
The Difference ◽  
Afm Cantilever

<div>Infrared chemical microscopy through mechanical probing of light-matter interactions by atomic force microscopy (AFM) bypasses the diffraction limit. One increasingly popular technique is photo-induced force microscopy (PiFM), which utilizes the mechanical heterodyne signal detection between cantilever mechanical resonant oscillations and the photo induced force from light-matter interaction. So far, photo induced force microscopy has been operated in only one heterodyne configuration. In this article, we generalize heterodyne configurations of photoinduced force microscopy by introducing two new schemes: harmonic heterodyne detection and sequential heterodyne detection. In harmonic heterodyne detection, the laser repetition rate matches integer fractions of the difference between the two mechanical resonant modes of the AFM cantilever. The high harmonic of the beating from the photothermal expansion mixes with the AFM cantilever oscillation to provide PiFM signal. In sequential heterodyne detection, the combination of the repetition rate of laser pulses and polarization modulation frequency matches the difference between two AFM mechanical modes, leading to detectable PiFM signals. These two generalized heterodyne configurations for photo induced force microscopy deliver new avenues for chemical imaging and broadband spectroscopy at ~10 nm spatial resolution. They are suitable for a wide range of heterogeneous materials across various disciplines: from structured polymer film, polaritonic boron nitride materials, to isolated bacterial peptidoglycan cell walls. The generalized heterodyne configurations introduce flexibility for the implementation of PiFM and related tapping mode AFM-IR, and provide possibilities for additional modulation channel in PiFM for targeted signal extraction with nanoscale spatial resolution.</div>

Application of chemical imaging sensor to in-situ pH imaging in the vicinity of a corroding metal surface

2015 ◽  
Vol 183 ◽  
pp. 137-142 ◽  
Author(s):  
Ko-ichiro Miyamoto ◽  
Sakura Sakakita ◽  
Torsten Wagner ◽  
Michael J. Schöning ◽  
Tatsuo Yoshinobu
Keyword(s):  
Metal Surface ◽  
Chemical Imaging ◽  
Ph Imaging ◽  
Imaging Sensor

scholarly journals Advances and Perspectives in Chemical Imaging in Cellular Environments Using Electrochemical Methods

2018 ◽  
Author(s):  
Robert A. Lazenby ◽  
Ryan J. White
Keyword(s):  
Spatial Resolution ◽  
Chemical Imaging ◽  
Active Species ◽  
Electrochemical Methods ◽  
High Time Resolution ◽  
Spatiotemporal Resolution ◽  
Cellular Processes ◽  
Significant Research ◽  
Technological Developments ◽  
Multiple Frame

This review discusses a broad range of recent advances (2013-2017) of chemical imaging using electrochemical methods, with a particular focus on techniques that have been applied to study cellular processes, or techniques that show promise for use in this field in the future. Non-scanning techniques such as microelectrode arrays (MEAs) offer high time-resolution (&lt; 10 ms) imaging, however at reduced spatial resolution. In contrast, scanning electrochemical probe microscopies (SEPMs) offer higher spatial resolution (as low as a few nm per pixel) imaging, with images collected typically over many minutes. Recent significant research efforts to improve the spatial resolution of SEPMs using nanoscale probes, and to improve the temporal resolution using fast scanning have resulted in movie (multiple frame) imaging with frame rates as low as a few seconds per image. Many SEPM techniques lack chemical specificity or have poor selectivity (defined by the choice of applied potential for redox-active species). This can be improved using multifunctional probes, ion-selective electrodes and tip-integrated biosensors, although additional effort may be required to preserve sensor performance after miniaturization of these probes. We discuss advances to the field of electrochemical imaging, and technological developments which are anticipated to extend the range of processes that can be studied. This includes imaging cellular processes with increased sensor selectivity and at much improved spatiotemporal resolution than has been previously customary.

scholarly journals Miniaturized chemical imaging sensor system using an OLED display panel

2010 ◽  
Vol 5 ◽  
pp. 516-519 ◽  
Author(s):  
Ko-ichiro Miyamoto ◽  
Kazumi Kaneko ◽  
Akira Matsuo ◽  
Torsten Wagner ◽  
Shin’ichiro Kanoha ◽  
...  
Keyword(s):  
Chemical Imaging ◽  
Sensor System ◽  
Imaging Sensor ◽  
Oled Display

scholarly journals Multi-beam Synchrotron FTIR Chemical Imaging: Impacts of Schwarzschild Objective and Spatial Oversampling on Spatial Resolution

2013 ◽  
Vol 425 (14) ◽  
pp. 142001 ◽  
Author(s):  
Eric C Mattson ◽  
Miriam Unger ◽  
Binod Manandhar ◽  
Zahrasadat Alavi ◽  
Carol J Hirschmugl
Keyword(s):  
Spatial Resolution ◽  
Chemical Imaging
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