{"id":87,"date":"2020-02-13T01:56:35","date_gmt":"2020-02-13T06:56:35","guid":{"rendered":"https:\/\/www.cd-bioparticles.com\/blog\/?p=87"},"modified":"2020-02-13T01:56:35","modified_gmt":"2020-02-13T06:56:35","slug":"new-raman-spectroscopy-can-see-particles-smaller-than-a-billionth-of-a-meter","status":"publish","type":"post","link":"https:\/\/www.cd-bioparticles.com\/blog\/applications\/new-raman-spectroscopy-can-see-particles-smaller-than-a-billionth-of-a-meter\/","title":{"rendered":"New Raman Spectroscopy Can &#8220;See&#8221; Particles Smaller Than A Billionth of A Meter"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"380\" src=\"\/blog\/wp-content\/uploads\/2020\/02\/New-Raman-Spectroscopy-Can-See-Particles-Smaller-Than-A-Billionth-of-A-Meter-1.jpg\" alt=\"\" class=\"wp-image-88\" srcset=\"\/blog\/wp-content\/uploads\/2020\/02\/New-Raman-Spectroscopy-Can-See-Particles-Smaller-Than-A-Billionth-of-A-Meter-1.jpg 660w, \/blog\/wp-content\/uploads\/2020\/02\/New-Raman-Spectroscopy-Can-See-Particles-Smaller-Than-A-Billionth-of-A-Meter-1-300x173.jpg 300w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><\/figure><\/div>\n\n\n\n<p>Raman spectrum\nis a type of scattering spectrum. Raman spectroscopy is based on the Raman\nscattering effect found by Indian scientist CV Raman, and analyzes the\nscattering spectrum with a frequency different from the incident light to\nobtain information on molecular vibration and rotation. This analytical method\nis applied to the study of molecular structure.<\/p>\n\n\n\n<p>Japanese\nscientists have developed a new Raman spectroscopy method that enables\nresearchers to analyze the chemical composition and structure of metal\nparticles with a diameter of only 0.5-2 nanometers. This latest breakthrough is\nexpected to enable scientists to develop new micromaterials, which are widely\nused in electronics, biomedicine, chemistry, and other fields.<\/p>\n\n\n\n<p>Metal\nnanoparticles have a wide range of potential applications and are becoming a\nhot material in modern research. Researchers have been able to develop metal\nnanocrystals with a diameter of only 0.5-2 nanometers (one nanometer is one\nbillionth of a meter). These small particles are called &#8220;subnano\nclusters&#8221; (SNCs) and have very unique characteristics varying with the\nnumber of constituting atoms (atomicity). For example, it can act as an\nexcellent catalyst in electrochemical reactions; it also exhibits a special\nquantum size effect. However, the\nexisting analysis methods are not capable of SNCs detection research. For\nexample, although traditional Raman spectroscopy and its variants have been\nused in many fields, it is not sufficient to detect SNCs due to its low\nsensitivity. In view of this, the Tokyo Institute of Technology research team\nproposed a new method to enhance the performance of Raman spectrometry and make\nit capable of SNCs analysis.<\/p>\n\n\n\n<p>In the\nresearch, the Japanese team worked to improve the performance of specific Raman\nspectroscopy, surface-enhanced Raman spectroscopy. They said that adding\ngold\/silver nanoparticles encapsulated in a thin shell of inert silica to the\nsample can amplify the light signal of the sample, thereby increasing the\nsensitivity of the technology. Therefore, they first theoretically determined\nthe optimal size and composition of gold\/silver and found that a 100 nm silver\noptical amplifier can greatly amplify the signal of SNCs adhered to a porous\nsilica shell.<\/p>\n\n\n\n<p>&#8220;This spectroscopic technique selectively generates Raman signals of substances that are situated in close proximity to the surfaces of the shell-isolated nanoparticles&#8221;, explains Professor Akiyoshi Kuzume, one of the study leaders. To verify these findings, they measured the Raman spectra of tin oxide SNCs to see if they could find an explanation in their structure or chemical composition to explain that they have unexplained high catalytic activity in certain chemical reactions. By comparing the results of Raman measurements with structural simulation and theoretical analysis, they discovered new insights into the structure of tin oxide SNCs, explaining the origin of the specific catalytic activity of tin oxide SNCs with atomic dependence The methodology used in this study will have a major impact on the development of better analytical techniques and sub-nanometer science. Professor Kimihisa Yamamoto concluded, &#8220;The high-sensitivity characterization methodology elaborated here can provide a comprehensive understanding of the chemical and structural natures of subnanomaterials, which facilitate the rational design of subnanomaterials on the atomic scale for practical applications, such as in catalysts, biosensors, and electronics.&#8221; <\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Reference:<br> Kuzume, A., Ozawa, M., Tang, Y., Yamada, Y., Haruta, N., &amp; Yamamoto, K. (2019). Ultrahigh sensitive Raman spectroscopy for subnanoscience: Direct observation of tin oxide clusters. Science Advances, 5(12), eaax6455. <\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Raman spectrum is a type of scattering spectrum. Raman spectroscopy is based on the Raman scattering effect found by Indian<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[20,19],"class_list":["post-87","post","type-post","status-publish","format-standard","hentry","category-applications","tag-raman-spectroscopy","tag-subnano-clusters"],"_links":{"self":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/87","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/comments?post=87"}],"version-history":[{"count":1,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/87\/revisions"}],"predecessor-version":[{"id":89,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/87\/revisions\/89"}],"wp:attachment":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/media?parent=87"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/categories?post=87"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/tags?post=87"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}