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  <created>1784915214</created>
  <changed>1784915214</changed>
  <title><![CDATA[fig5_no_letters.jpg]]></title>
      <body><![CDATA[<p>Comparison&nbsp;of&nbsp;nanoscale&nbsp;3D-printed&nbsp;structures&nbsp;produced&nbsp;without&nbsp;grayscale&nbsp;patterning&nbsp;(top&nbsp;row)&nbsp;and&nbsp;with&nbsp;grayscale&nbsp;projection&nbsp;two-photon&nbsp;lithography&nbsp;(GP-TPL)&nbsp;(bottom&nbsp;row).&nbsp;The&nbsp;top&nbsp;row&nbsp;shows&nbsp;scanning&nbsp;electron&nbsp;microscope&nbsp;images&nbsp;with&nbsp;defects&nbsp;such&nbsp;as&nbsp;bulging&nbsp;struts,&nbsp;uneven&nbsp;surfaces,&nbsp;collapsed&nbsp;internal&nbsp;features,&nbsp;and&nbsp;distorted&nbsp;curved&nbsp;structures,&nbsp;highlighted&nbsp;by&nbsp;red&nbsp;arrows.&nbsp;The&nbsp;bottom&nbsp;row&nbsp;shows&nbsp;the&nbsp;same&nbsp;structures&nbsp;fabricated&nbsp;with&nbsp;GP-TPL,&nbsp;exhibiting&nbsp;smoother&nbsp;surfaces,&nbsp;more&nbsp;uniform&nbsp;lattice&nbsp;geometry,&nbsp;well-defined&nbsp;curved&nbsp;features,&nbsp;and&nbsp;significantly&nbsp;thinner,&nbsp;higher-fidelity&nbsp;bridges&nbsp;as&nbsp;narrow&nbsp;as&nbsp;53&nbsp;nanometers.&nbsp;Insets&nbsp;provide&nbsp;magnified&nbsp;views&nbsp;of&nbsp;the&nbsp;improved&nbsp;lattice&nbsp;quality.&nbsp;Scale&nbsp;bars&nbsp;range&nbsp;from&nbsp;50&nbsp;micrometers&nbsp;to&nbsp;53&nbsp;nanometers.</p>]]></body>
    <alt><![CDATA[Diagram illustrating a nanoscale 3D printing process using a femtosecond near-infrared laser, mirrors, lenses, and a digital micromirror device (DMD) to project patterned light into a photoresist on a glass slide.]]></alt>
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      <alt><![CDATA[Diagram illustrating a nanoscale 3D printing process using a femtosecond near-infrared laser, mirrors, lenses, and a digital micromirror device (DMD) to project patterned light into a photoresist on a glass slide.]]></alt>
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          <item><![CDATA[Research Horizons]]></item>
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