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<a href="/adlp" class="usa-nav__link">Assoc Director of Laboratory Programs</a>
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<a href="/laboratories" class="usa-nav__link">Laboratories</a>
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<a href="/ctl" class="usa-nav__link">Communications Technology Laboratory</a>
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<a href="/el" class="usa-nav__link">Engineering Laboratory</a>
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<a href="/itl" class="usa-nav__link">Information Technology Laboratory</a>
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<a href="/mml" class="usa-nav__link">Material Measurement Laboratory</a>
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<a href="/pml" class="usa-nav__link">Physical Measurement Laboratory</a>
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<a href="/ncnr" class="usa-nav__link">NIST Center for Neutron Research</a>
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<a href="/cnst" class="usa-nav__link">CNST NanoFab</a>
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<a href="/labs-major-programs/research-test-beds" class="usa-nav__link">Research Test Beds</a>
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<a href="/baldrige" class="usa-nav__link">Baldrige Performance Excellence Program</a>
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<a href="/chips" class="usa-nav__link">CHIPS for America Initiative</a>
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<a href="/mep" class="usa-nav__link">Manufacturing Extension Partnership (MEP)</a>
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<li>
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<a href="/oam" class="usa-nav__link">Office of Advanced Manufacturing</a>
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<li>
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<a href="/spo" class="usa-nav__link">Special Programs Office</a>
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<li>
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<a href="/tpo" class="usa-nav__link">Technology Partnerships Office</a>
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<button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-4"><span>Services & Resources</span></button>
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<a href="/calibrations" class="usa-nav__link">Calibration Services</a>
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<a href="/nvlap" class="usa-nav__link">Laboratory Accreditation (NVLAP)</a>
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<a href="/nist-quality-system" class="usa-nav__link">Quality System</a>
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<a href="/srm" class="usa-nav__link">Standard Reference Materials (SRMs)</a>
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<a href="/sri" class="usa-nav__link">Standard Reference Instruments (SRIs)</a>
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<a href="/standardsgov" class="usa-nav__link">Standards.gov</a>
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<a href="/pml/time-and-frequency-division/time-services" class="usa-nav__link">Time Services</a>
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<a href="/pml/owm" class="usa-nav__link">Office of Weights and Measures</a>
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<a href="https://webbook.nist.gov/chemistry/" class="usa-nav__link">Chemistry WebBook</a>
|
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<a href="https://nvd.nist.gov/" class="usa-nav__link">National Vulnerability Database</a>
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<a href="/srd" class="usa-nav__link">Standard Reference Data (SRD)</a>
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<a href="/tpo" class="usa-nav__link">License & Patents</a>
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<a href="/nist-research-library" class="usa-nav__link">NIST Research Library</a>
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<a href="/news-events/events" class="usa-nav__link">Events</a>
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<a href="/blogs" class="usa-nav__link">Blogs</a>
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<h1 class="nist-page__title">3D Orientation Imaging of Polymer Chains with Polarization-Controlled Coherent Raman Microscopy</h1>
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<div class="nist-field__label">Published</div>
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<div class="nist-field__item"><time datetime="2022-12-07T12:00:00Z">December 7, 2022</time>
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<div class="nist-field__item"><span class="nist-author">Shuyu Xu</span>, <span class="nist-author">Young Jong Lee</span></div>
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<h3>Abstract</h3>
|
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Despite the ubiquity of three-dimensional (3D) anisotropic materials, their 3D molecular alignment cannot be measured using conventional two-dimensional (2D) polarization imaging. Here, we present images of the 3D angles of molecular orientations with submicrometer spatial resolution acquired through polarization-controlled coherent anti-Stokes Raman scattering microscopy. The hyperspectral Raman data of a polyethylene (PE) film were converted into images, showing the polymer chains' 3D angles and order parameters. The 3D orientation images of PE chains in ring-banded spherulites show that the azimuthal angles of the chains are perpendicular to the crystal growth direction, while the out-of-plane angles display limited-range oscillations synchronous with ring banding. The prevailing crystal growth model of fully twisting lamellae is inconsistent with the observed restricted oscillations of the out-of-plane direction, which are unobservable through conventional 2D projected imaging. This high-resolution, label-free, quantitative imaging of 3D molecular orientation can become a standard measurement tool for the microscopic structures of complex synthetic and biological materials.
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<div class="nist-field__item">Journal of the American Chemical Society</div>
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<div class="nist-field__item">144</div>
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<div class="nist-field__item"><a href="https://doi.org/10.1021/jacs.2c10029" target="_blank">https://doi.org/10.1021/jacs.2c10029</a></div>
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<div class="nist-field__item"><a href="https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934584" target="_blank">Local Download</a></div>
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<h3 class="nist-field__label">Keywords</h3>
|
|||
|
|
<div class="nist-field__item">CARS, 3D orientation, polarization, polymer, spherulite, polyethylene</div>
|
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<a href="/topic-terms/spectroscopy" hreflang="en">Spectroscopy</a>, <a href="/topic-terms/polymers" hreflang="en">Polymers</a>, <a href="/topic-terms/molecular-characterization" hreflang="en">Molecular characterization</a>, <a href="/topic-terms/composition-and-structure" hreflang="en">Composition and structure</a> and <a href="/topic-terms/analytical-chemistry" hreflang="en">Analytical chemistry</a></div>
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>Citation</h2>
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<div class="js-view-dom-id-22feb414667eb81552bb4cb6697090811ea0e2d376dc245c0b5dbf295c7202e8">
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<article class="bibcite-reference">
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<div class="bibcite-citation">
|
|||
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Xu, S.
|
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and Lee, Y.
|
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|
|||
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(2022),
|
|||
|
|
3D Orientation Imaging of Polymer Chains with Polarization-Controlled Coherent Raman Microscopy, Journal of the American Chemical Society, [online], https://doi.org/10.1021/jacs.2c10029, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934584
|
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(Accessed March 4, 2025)
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<li><a href="http://dx.doi.org/https://doi.org/10.1021/jacs.2c10029">DOI</a></li>
|
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<li><a href="https://scholar.google.com/scholar?btnG=Search%2BScholar&as_q=%223D%2BOrientation%2BImaging%2Bof%2BPolymer%2BChains%2Bwith%2BPolarization-Controlled%2BCoherent%2BRaman%2BMicroscopy%22&as_occt=any&as_epq=&as_oq=&as_eq=&as_publication=&as_ylo=&as_yhi=&as_sdtAAP=1&as_sdtp=1">Google Scholar</a></li>
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<h4 class="usa-alert__heading">Issues</h4>
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If you have any questions about this publication or are having problems accessing it, please contact <a href="mailto:reflib@nist.gov" class="usa-link">reflib@nist.gov</a>.
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<div class="text-italic font-sans-2xs">
|
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Created December 7, 2022
|
|||
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