Atomic point contact significantly enhances Raman scattering
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New research shows that allowing the atomic point of a tip-enhanced Raman spectrometer to touch the surface of a sample increases sensitivity.
Researchers have discovered a huge enhancement of Raman scattering mediated by the formation of an atomic point contact between a plasmonic silver tip and a Si(111)-7×7 reconstructed surface. This state-of-the-art low-temperature tip-enhanced Raman spectroscopy (TERS) allows scientists to conduct atomic-scale vibrational spectroscopy. The developers suggest this technique could pave the way for exploring atomic-scale light-matter interactions, leading to a new discipline in light science and technology.
According to researchers, the rapid advancement of nanoscience and nanotechnology now requires atomic-scale optical spectroscopy to characterise its atomic-scale structures and defects in detail. TERS has demonstrated the exceptional sensitivity required to observe vibrational
Atomic Point Contact Considerably Enhances Raman Scattering at Nanoscale
Today, nanofabrication of electronic systems has reached a 1 nm scale (10
−
9 m). The quick development of nanotechnology and nanoscience currently needs atomic-scale optical spectroscopy to define atomistic structures that will influence the functions and properties of the electronic devices.
(a) Illustration of the experiment. (b) Scanning electron micrograph of an Ag tip (top) and scanning tunneling microscopy image of the Si(111)-7×7 surface. (c) Atomic point contact Raman spectra. Image Credit: National Institutes of Natural Sciences.
The international research team, led by Takashi Kumagai from the Institute for Molecular Science, observed a massive improvement of Raman scattering facilitated by the development of an atomic point contact between a Si(111)-7×7 reconstructed surface and a plasmonic silver tip. This was realized using advanced low-temperature tip-enhanced Raman spectroscopy that hel
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IMAGE: Figure 1 (a) Illustration of the experiment. (b) Scanning electron micrograph of a Ag tip (top) and scanning tunneling microscopy image of the Si(111)-7×7 surface. (c) Atomic point contact Raman. view more
Credit: NINS/IMS
Nanofabrication of electronic devices has reached a single nanometer scale (10
-9 m). The rapid advancement of nanoscience and nanotechnology now requires atomic-scale optical spectroscopy in order to characterize atomistic structures that will affect the properties and functions of the electronic devices.
The international team headed by Takashi Kumagai at Institute for Molecular Science discovered a huge enhancement of Raman scattering mediated by a formation of an atomic point contact between a plasmonic silver tip and a Si(111)-7×7 reconstructed surface. This was achieved by means of state-of-the-art low-temperature tip-enhanced Raman spectroscopy which allows to conduct atomic-scale vibrational spectroscopy.
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Japan is well-known for its extensive and incredibly efficient transportation network. It is renowned for its quirky line-up of fun, and creative themed trains.
Here are the top three must-try train lines around Japan from a food lover’s dream on the Rail Kitchen Chikugo in Kyushu to gorgeous sightseeing along the Three Star Road to fine dining and sightseeing all in one of the Tohoku Emotion Train. These are something to look forward to when we can all travel again.
Rail Kitchen Chikugo, Kyushu
Food lovers visiting Fukuoka Prefecture should book their tickets for the Rail Kitchen Chikugo; a beautifully designed sightseeing train that celebrates both local cuisine and craftsmanship. Rail Kitchen Chikugo is effectively a mobile restaurant operated by the private railroad company Nishitetsu Railway, that runs along scenic rural routes on the Nishitetsu Tenjin Omuta Line and Daizafu Line. The train is named after the historic Chikugo Province that once covered the southern