Near-Field Plasmonic probe with Super Resolution and High Throughput and Signal-to-Noise Ratio

Plasmonic AFM tip using a quartz-like NANOSENSORS qp-CONT as basis, as described in: Ruei-Han Jiang et Al., Near-Field Plasmonic Probe with Super Resolution and High Throughput and Signal-to-Noise Ratio, Nano Letters Article ASAP DOI: 10.1021/acs.nanolett.7b04142, image courtesy of Ruei-Han Jiang, Department of Materials Science and Engineering National Tsing Hua University
Plasmonic AFM tip using a quartz-like NANOSENSORS Uniqprobe qp-CONT as basis, image courtesy of Ruei-Han Jiang, Department of Materials Science and Engineering, National Tsing Hua University

In the recently published article “New-Field Plasmonic probe with Super Resolution and High Throughput and Signal-to-Noise Ratio by Ta-Jen Yen et. Al. a plasmonic tip is described that could be employed in near-field optics, nanolithography, tip-enhanced Raman spectroscopy and other applications.

The authors of the article demonstrate what other papers have already talked about in the past: it is possible to use probes like the NANOSENSORS Uniqprobe qp-CONT as basis to make working probes for NSOM or TERS, by using radially polarized light. They go a step further by FIB tailoring the metal film that fully covers the transparent tip.

Congratulations to the authors!

You can find the full article if you follow this external link:

Ruei-Han Jiang, Chi Chen, Ding-Zheng Lin, He-Chun Chou, Jen-You Chu, and Ta-Jen Yen
Near-Field Plasmonic Probe with Super Resolution and High Throughput and Signal-to-Noise Ratio
Nano Letters Article ASAP
DOI: 10.1021/acs.nanolett.7b04142
http://pubs.acs.org/doi/full/10.1021/acs.nanolett.7b04142

A lot of work was done by research groups at the University of Neuchâtel, more than 10 years back, demonstrating the high resolution properties of microfabricated apertureless (fully metal coated) transparent quartz tips, where a connection between the observed high spatial resolution and longitudinally polarized fields confined at the probe apex was observed. The authors gave direct experimental evidence that, after injection of a radially polarized beam, a confined single spot is produced at the tip apex.

For further relevant papers, also refer to:

Tortora, E. Descrovi, L. Aeschimann, L. Vaccaro, H.-P. Herzig, R. Dändliker,
Selective coupling of HE 11 and TM 01 modes into microfabricated fully metal-coated quartz probes, Ultramicroscopy 107, 158 (2007), https://doi.org/10.1016/j.ultramic.2006.07.004
https://www.sciencedirect.com/science/article/pii/S030439910600146X

Descrovi, L. Vaccaro, L. Aeschimann, W. Nakagawa, U. Staufer, H.-P. Herzig,
Optical properties of microfabricated fully-metal-coated near-field probes in collection mode, J. Opt. Soc. Am. A/Vol. 22, No 7 (2005), https://doi.org/10.1364/JOSAA.22.001432
https://www.osapublishing.org/josaa/abstract.cfm?uri=josaa-22-7-1432

Descrovi, L. Vaccaro, W. Nakagawa, L. Aeschimann, U. Staufer, H.-P. Herzig,
Collection of transverse and longitudinal fields by means of apertureless nanoprobes with different metal coating characteristics, J. Appl. Phys. Lett., vol. 85, 5340 (2004), https://doi.org/10.1063/1.1827925
http://aip.scitation.org/doi/10.1063/1.1827925

NANOSENSORS introduces MSS-8RM – a readout module for membrane-type surface stress sensors (MSS)

The NANOSENSORS Membrane-type Surface-stress Sensor (MSS) is a device to detect specific components in gaseous phase with high sensitivity using a piezoresisitive nanomechanical sensor. This device shows great potential as a core component for electronic-nose (olfactory) systems utilized in e.g., medical, food, environment, safety and security fields.
Now NANOSENSORS™ introduces the MSS 8 Channel Readout Module (MSS-8RM), a basic electronic module to operate and to readout NANOSENSORS™ MSS, up to 8 sensors simultaneously, under a hardware configuration for electronic-nose sensing. MSS-8RM contains two air pumps and users can examine “self-prepared” MSS (compatible: SD-MSS-1K and SD-MSS-1K2G) under different gas flow conditions.

NANOSENSORS MSS-8RM - 8 Channel Readout Module for MSS Membrane-type Surface-stress Sensor
NANOSENSORS MSS-8RM – 8 Channel Readout Module for MSS

MSS-8RM is designed as simply as possible so that users can learn about a basic electronic-nose system and further improve the system performance. MSS-8RM does not include any data processing functions to distinguish one sample from the other. Users will obtain raw numerical data of the sensor responses under different conditions as final output.

inside NANOSENSORS MSS-8RM - sensor board for maximum 8 Membrane-type Surface Stress Sensor (MSS)
inside NANOSENSORS MSS-8RM – sensor board

NANOSENSORS™ has added MSS-8RM – MSS 8 Channel Readout Module (order code: SD-MSS-8RM ) – to its Special Development list (http://www.nanosensors.com/pdf/SpecialDevelopmentsList.pdf).
For further technical information, price or delivery times please contact us at info@nanosensors.com

Injection and controlled motion of conducting domain walls in improper ferroelectric Cu-Cl boracite

NANOSENSORS PPP-EFM AFM tips were used in the research for this article. Have a look at the abstract or follow the external link to the full article.

Figure 1: Crystal structure and domains in boracites. From: Injection and controlled motion of conducting domain walls in improper ferroelectric Cu-Cl boracite
Figure 1: Crystal structure and domains in boracites.
From: Injection and controlled motion of conducting domain walls in improper ferroelectric Cu-Cl boracite

Raymond G.P. McQuaid, Michael P. Campbell, Roger W. Whatmore, Amit Kumar, J. Marty Gregg
Injection and controlled motion of conducting domain walls in improper ferroelectric Cu-Cl boracite. Nat. Commun. 8, 15105 doi: 10.1038/ncomms15105 (2017).

Abstract:
Ferroelectric domain walls constitute a completely new class of sheet-like functional material. Moreover, since domain walls are generally writable, erasable and mobile, they could be useful in functionally agile devices: for example, creating and moving conducting walls could make or break electrical connections in new forms of reconfigurable nanocircuitry. However, significant challenges exist: site-specific injection and annihilation of planar walls, which show robust conductivity, has not been easy to achieve. Here, we report the observation, mechanical writing and controlled movement of charged conducting domain walls in the improper-ferroelectric Cu3B7O13Cl. Walls are straight, tens of microns long and exist as a consequence of elastic compatibility conditions between specific domain pairs. We show that site-specific injection of conducting walls of up to hundreds of microns in length can be achieved through locally applied point-stress and, once created, that they can be moved and repositioned using applied electric fields.

Please follow this external link for the full article: https://www.nature.com/articles/ncomms15105

Creative Commons BYThe article “Injection and controlled motion of conducting domain walls in improper ferroelectric Cu-Cl boracite” by McQuaid, R. G. P. et al. is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/