{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T05:46:42Z","timestamp":1777441602433,"version":"3.51.4"},"reference-count":29,"publisher":"SAGE Publications","issue":"11","license":[{"start":{"date-parts":[[2004,11,1]],"date-time":"2004-11-01T00:00:00Z","timestamp":1099267200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Appl Spectrosc"],"published-print":{"date-parts":[[2004,11]]},"abstract":"<jats:p>\n                    Dipicolinic acid (DPA, 2,6-pyridinedicarboxylic acid) is a substance uniquely present in bacterial spores such as that from anthrax ( B. anthracis). It is known that DPA can be detected by the long-lived fluorescence of its terbium chelate; the best limit of detection (LOD) reported thus far using a large benchtop gated fluorescence instrument using a pulsed Xe lamp is 2 nM. We use a novel AlGaN light-emitting diode (LED) fabricated on a sapphire substrate that has peak emission at 291 nm. Although the overlap of the emission band of this LED with the absorption band of Tb-DPA (\u03bb\n                    <jats:sub>max<\/jats:sub>\n                    doublet: 273, 279 nm) is not ideal, we demonstrate that a compact detector based on this LED and an off-the-shelf gated photodetection module can provide an LOD of 0.4 nM, thus providing a basis for convenient early warning detectors.\n                  <\/jats:p>","DOI":"10.1366\/0003702042475556","type":"journal-article","created":{"date-parts":[[2004,11,17]],"date-time":"2004-11-17T18:49:03Z","timestamp":1100717343000},"page":"1360-1363","source":"Crossref","is-referenced-by-count":23,"title":["Mid-Ultraviolet Light-Emitting Diode Detects Dipicolinic Acid"],"prefix":"10.1177","volume":"58","author":[{"given":"Qingyang","family":"Li","sequence":"first","affiliation":[{"name":"Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409 (Q.Y.L., P.K.D.); NanoTech Center, Texas Tech University, Lubbock, Texas 79409 (P.K.D., H.T.); and Sandia National Laboratory, Albuquerque, New Mexico 87185 (M.H.C., A.J.F., A.A.A., K.H.A.B., S.R.L.)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Purnendu K.","family":"Dasgupta","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409 (Q.Y.L., P.K.D.); NanoTech Center, Texas Tech University, Lubbock, Texas 79409 (P.K.D., H.T.); and Sandia National Laboratory, Albuquerque, New Mexico 87185 (M.H.C., A.J.F., A.A.A., K.H.A.B., S.R.L.)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henryk","family":"Temkin","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409 (Q.Y.L., P.K.D.); NanoTech Center, Texas Tech University, Lubbock, Texas 79409 (P.K.D., H.T.); and Sandia National Laboratory, Albuquerque, New Mexico 87185 (M.H.C., A.J.F., A.A.A., K.H.A.B., S.R.L.)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. H.","family":"Crawford","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409 (Q.Y.L., P.K.D.); NanoTech Center, Texas Tech University, Lubbock, Texas 79409 (P.K.D., H.T.); and Sandia National Laboratory, Albuquerque, New Mexico 87185 (M.H.C., A.J.F., A.A.A., K.H.A.B., S.R.L.)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A. J.","family":"Fischer","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409 (Q.Y.L., P.K.D.); NanoTech Center, Texas Tech University, Lubbock, Texas 79409 (P.K.D., H.T.); and Sandia National Laboratory, Albuquerque, New Mexico 87185 (M.H.C., A.J.F., A.A.A., K.H.A.B., S.R.L.)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A. A.","family":"Allerman","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409 (Q.Y.L., P.K.D.); NanoTech Center, Texas Tech University, Lubbock, Texas 79409 (P.K.D., H.T.); and Sandia National Laboratory, Albuquerque, New Mexico 87185 (M.H.C., A.J.F., A.A.A., K.H.A.B., S.R.L.)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K. H. A.","family":"Bogart","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409 (Q.Y.L., P.K.D.); NanoTech Center, Texas Tech University, Lubbock, Texas 79409 (P.K.D., H.T.); and Sandia National Laboratory, Albuquerque, New Mexico 87185 (M.H.C., A.J.F., A.A.A., K.H.A.B., S.R.L.)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S. 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