Self-Assembly in the Growth of Precious Opal
It is proposed that primary nucleation of amorphous microspherulites of hydrated silica in natural proto-precious-opal can be followed by a long range superlattice ordering process by means of electrostatic self-assembly. Necessary conditions in the thermodynamics are a high surface charge density o...
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description | It is proposed that primary nucleation of amorphous microspherulites of hydrated silica in natural proto-precious-opal can be followed by a long range superlattice ordering process by means of electrostatic self-assembly. Necessary conditions in the thermodynamics are a high surface charge density on microspherulite surfaces, a long Debye length and an appropriate number density of nucleation centres. A further chemical requirement is a high alkaline environmental pH from 9 to 10. It is also proposed that the characteristic concentric spherical shell-like structure of spherulites, centred on primary nuclei, are due to sequential deposition of intrinsic salts which precipitate out when the corresponding solubility limits in the liquid are successively exceeded. It can be that the better-known sedimentation of microspherulites under gravity only plays part in the final stabilization period of overall growth. |
doi_str_mv | 10.48550/arxiv.1001.0438 |
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Necessary conditions in the thermodynamics are a high surface charge density on microspherulite surfaces, a long Debye length and an appropriate number density of nucleation centres. A further chemical requirement is a high alkaline environmental pH from 9 to 10. It is also proposed that the characteristic concentric spherical shell-like structure of spherulites, centred on primary nuclei, are due to sequential deposition of intrinsic salts which precipitate out when the corresponding solubility limits in the liquid are successively exceeded. It can be that the better-known sedimentation of microspherulites under gravity only plays part in the final stabilization period of overall growth.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1001.0438</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Charge density ; Debye length ; Nucleation ; Organic chemistry ; Physics - Materials Science ; Sedimentation ; Self-assembly ; Silicon dioxide ; Spherical shells ; Spherulites ; Superlattices ; Surface charge</subject><ispartof>arXiv.org, 2010-01</ispartof><rights>2010. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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It can be that the better-known sedimentation of microspherulites under gravity only plays part in the final stabilization period of overall growth.</description><subject>Charge density</subject><subject>Debye length</subject><subject>Nucleation</subject><subject>Organic chemistry</subject><subject>Physics - Materials Science</subject><subject>Sedimentation</subject><subject>Self-assembly</subject><subject>Silicon dioxide</subject><subject>Spherical shells</subject><subject>Spherulites</subject><subject>Superlattices</subject><subject>Surface charge</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotj01Lw0AURQdBsNTuXcmAWxPfzJuvLEvRKhQq2H2YJC80JW3iTKL239taV3dzuJzD2J2AVDmt4cmHn-YrFQAiBYXuik0kokickvKGzWLcAYA0VmqNE_b4QW2dzGOkfdEeeXPgw5b4MnTfw5Z3NX8PVDbdGPm69-0tu659G2n2v1O2eXneLF6T1Xr5tpivEq-FTIxCEmXpSGKhMkUahSPKtDVWSI8lOWuNrpSpDFWgK4uIoCGrAYraY4VTdn-5_SvJ-9DsfTjm56L8XHQCHi5AH7rPkeKQ77oxHE5KuQRnhZNCSPwF_RlLdg</recordid><startdate>20100104</startdate><enddate>20100104</enddate><creator>Stewart, A M</creator><creator>Chadderton, Lewis T</creator><creator>Senior, Brian R</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20100104</creationdate><title>Self-Assembly in the Growth of Precious Opal</title><author>Stewart, A M ; Chadderton, Lewis T ; Senior, Brian R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a512-643e1cc8e23b494e5318ee9576712a3ce87765d46d6ed05d73330509f00bfa3d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Charge density</topic><topic>Debye length</topic><topic>Nucleation</topic><topic>Organic chemistry</topic><topic>Physics - Materials Science</topic><topic>Sedimentation</topic><topic>Self-assembly</topic><topic>Silicon dioxide</topic><topic>Spherical shells</topic><topic>Spherulites</topic><topic>Superlattices</topic><topic>Surface charge</topic><toplevel>online_resources</toplevel><creatorcontrib>Stewart, A M</creatorcontrib><creatorcontrib>Chadderton, Lewis T</creatorcontrib><creatorcontrib>Senior, Brian R</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Stewart, A M</au><au>Chadderton, Lewis T</au><au>Senior, Brian R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Self-Assembly in the Growth of Precious Opal</atitle><jtitle>arXiv.org</jtitle><date>2010-01-04</date><risdate>2010</risdate><eissn>2331-8422</eissn><abstract>It is proposed that primary nucleation of amorphous microspherulites of hydrated silica in natural proto-precious-opal can be followed by a long range superlattice ordering process by means of electrostatic self-assembly. 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subjects | Charge density Debye length Nucleation Organic chemistry Physics - Materials Science Sedimentation Self-assembly Silicon dioxide Spherical shells Spherulites Superlattices Surface charge |
title | Self-Assembly in the Growth of Precious Opal |
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