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Electrochemically etched amorphous carbon fiber tips with excellent mechanical rigidity and sub-100 nm apex radii effectively reduce the van der Waals adhesion and enable reliable positioning of about 100 nm or larger size NPs with about 100 nm precision. This system combines a piezoelectric bimorph for vertical tip motion, a four-quadrant piezo-tube for two-dimensional fine tip control and a two-dimensional piezoelectric walker for coarse lateral translation. Using this setup, we successfully position single Fe\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mn\/>\n                            <mml:mn>3<\/mml:mn>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    O\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mn\/>\n                            <mml:mn>4<\/mml:mn>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    magnetic NPs on micron sized superconducting quantum interference devices for optimal magnetic coupling between them and probe a NP\u2019s magnetism.\n                  <\/jats:p>","DOI":"10.1088\/1361-6528\/ae8673","type":"journal-article","created":{"date-parts":[[2026,7,6]],"date-time":"2026-07-06T22:48:15Z","timestamp":1783378095000},"page":"285301","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Nanoparticle manipulation with a carbon fiber tip in an electron microscope for\n                    <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\">\n                      <mml:mrow>\n                        <mml:mi>\u03bc<\/mml:mi>\n                      <\/mml:mrow>\n                    <\/mml:math>\n                    -SQUID magnetometry"],"prefix":"10.1088","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-1746-9790","authenticated-orcid":false,"given":"Umesh","family":"Chandra Thuwal","sequence":"first","affiliation":[{"name":"Indian Institute of Technology Kanpur"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-8417-7770","authenticated-orcid":false,"given":"Sumanta","family":"Maity","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology Kanpur"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4320-994X","authenticated-orcid":true,"given":"Clemens B","family":"Winkelmann","sequence":"additional","affiliation":[{"name":"IRIG-PHELIQS"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Herv\u00e9","family":"Courtois","sequence":"additional","affiliation":[{"name":"Institut N\u00e9el"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9430-300X","authenticated-orcid":true,"given":"Anjan Kumar","family":"Gupta","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology Kanpur"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,7,15]]},"reference":[{"key":"nanoae8673bib1","doi-asserted-by":"publisher","first-page":"1242","DOI":"10.1126\/science.262.5137.1242","type":"journal-article","article-title":"Quantum confinement in size-selected, surface-oxidized silicon nanocrystals","volume":"262","author":"Wilson","year":"1993","journal-title":"Science"},{"key":"nanoae8673bib2","doi-asserted-by":"publisher","first-page":"908","DOI":"10.1016\/j.arabjc.2017.05.011","type":"journal-article","article-title":"Nanoparticles: properties, applications and toxicities","volume":"12","author":"Khan","year":"2019","journal-title":"Arab. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2026-02-26","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-07-06","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-07-15","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}