{"id":265,"date":"2017-08-31T16:05:49","date_gmt":"2017-08-31T21:05:49","guid":{"rendered":"http:\/\/www.nano-blog.com\/?p=265"},"modified":"2022-09-02T13:27:51","modified_gmt":"2022-09-02T18:27:51","slug":"2-dimentional-material-and-other-nano-properties","status":"publish","type":"post","link":"http:\/\/www.nano-blog.com\/?p=265","title":{"rendered":"2-dimentional material and other nano properties"},"content":{"rendered":"

Material<\/strong>: Two-dimensional materials seem to have a staying power in various technical news magazines.\u00a0 The US Department of Energy released a report on efforts involving the Lawrence Berkeley National Laboratory work on molybdenum disulfide (MoS2<\/sub>). [Ref. 1]\u00a0 Granted that the quantity production of this or any other 2-D material is difficult.\u00a0 \u00a0Research is ongoing to determine the properties of the various 2-D materials with the knowledge that when some material exhibits characteristics that are very important for device development, someone will develop a means of producing the material in sufficient quantity.\u00a0 The researchers measured the bandgap of the material and found it to be 30% higher than theoretically predicted.\u00a0 The fact that they are able to develop a means of accurately measuring the bandgap holds promise for evaluating other materials.\u00a0 The researchers also found a relation between electron density and the bandgap.\u00a0 There findings indicate a possible application in sensors where optical or electrical effects can produce the complimentary effect.<\/p>\n

There was a caution that the molybdenum disulfide is extremely sensitive to its local environment.\u00a0 This is not different from the impact of exposure of graphene to the atmosphere.\u00a0 Considering that 2-D materials are one atom think, it means that 100% of the atoms are on the surface and able to react with the environment.\u00a0 Contamination by external factors ends up reducing the properties of the basic material.\u00a0 This fact makes some of the planned applications challenging.<\/p>\n

Nano-scale motion<\/strong>:\u00a0 Researchers at CalTech have made measurements of spherical gold nanoparticles moving in in water using a technique called liquid-cell 4D electron microscopy. [Ref. 2]\u00a0 A key element in observing the motion was the application of femtosecond laser pulses.\u00a0 Their efforts were of a liquid, a few hundreds of nanometers thick, captured between parallel plates.\u00a0 The particles appear to be driven by steam nanobubbles near the particles surface.\u00a0 This provides the initial action and then the resultant motion is a random motion as particles bounce of other particles.\u00a0 The hope is that the knowledge gained from this work will provide knowledge to develop both micro and nano actuated transport mechanisms.<\/p>\n

Light induced crystal shape changes<\/strong>: Work by scientists at KAUST demonstrated photostriction in Perovskite crystals.\u00a0 In particular the researchers focused on MAPbBr3.\u00a0 When illuminated by light, the material\u2019s photostriction changes the internal strain in the material.\u00a0 Their technique which employs in-situ Raman spectroscopy with confocal microscopy was able to measure intrinsic photoinduced lattice deformation.\u00a0 The researchers demonstrated that only a part of the change was due to the photovoltaic effect.\u00a0 They theorize that the generation of positive and negative charges due to the light polarizes the material which creates a change in the material structure.\u00a0 The researchers think that understanding the mechanisms behind the structural changes could provide a significant benefit in developing greater efficiency solar cells.\u00a0 Other possible applications include optoelectronic devices.<\/p>\n

Thoughts<\/strong>: The tools for working in the nano-realm are improving.\u00a0 The discovery of different properties that could be applied to new devices are increasing.\u00a0 The \u201cnano\u201d revolution has been around for a number of years.\u00a0 There are application of nanomaterials being applied to commercial products for increased performance.\u00a0 Medicine is using the nano-sized carriers to combat diseases.\u00a0 But, are we missing something basic?\u00a0 Are we really using the properties of the nano-scale?\u00a0 More on this line of thinking later.<\/p>\n

Reference<\/strong>:<\/p>\n

    \n
  1. http:\/\/www.newswise.com\/doescience\/?article_id=680155&returnurl=aHR0cHM6Ly93d3cubmV3c3dpc2UuY29tL2FydGljbGVzL2xpc3Q<\/a>=<\/li>\n
  2. http:\/\/nanotechweb.org\/cws\/article\/tech\/69765<\/a><\/li>\n
  3. https:\/\/phys.org\/news\/2017-08-photosensitive-perovskites-exposed.html<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    Material: Two-dimensional materials seem to have a staying power in various technical news magazines.\u00a0 The US Department of Energy released a report on efforts involving the Lawrence Berkeley [..]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,15],"tags":[],"class_list":["post-265","post","type-post","status-publish","format-standard","hentry","category-nano","category-technology"],"_links":{"self":[{"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=\/wp\/v2\/posts\/265","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=265"}],"version-history":[{"count":1,"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=\/wp\/v2\/posts\/265\/revisions"}],"predecessor-version":[{"id":266,"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=\/wp\/v2\/posts\/265\/revisions\/266"}],"wp:attachment":[{"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=265"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.nano-blog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}