{"openapi":"3.1.0","info":{"title":"DOAJ API","version":"1.0.0","description":"The Directory of Open Access Journals as an API, powered by DOAJ — the authoritative, community-curated index of vetted open-access scholarship covering more than 20,000 quality-controlled journals and 10 million+ articles across every discipline. Search open-access journals with full Elasticsearch query syntax, getting each journal's title, ISSNs, publisher and country, subjects, languages, whether article-processing charges (APC) apply, license and the year it became open access; read a journal's complete record including its subjects with classification scheme, keywords, licences, APC prices, fee-waiver policy, peer-review process, plagiarism detection, long-term preservation and self-archiving (deposit) policies and homepage; search open-access articles returning title, authors, journal, year, DOI, keywords and a free full-text link; and read an article's full metadata with its abstract, authors and affiliations, journal and ISSNs, pages, subjects and direct links to the freely readable full text. Ideal for open-science tooling, library and repository systems, research discovery, APC and policy analysis, and any application that needs legally free, peer-reviewed scholarship. Identify a journal by its ISSN and an article by its DOI or DOAJ id from search results. Data from DOAJ.","contact":{"name":"PremiumApi","url":"https://www.oanor.com/by/premiumapi"}},"servers":[{"url":"https://api.oanor.com/doaj-api","description":"oanor gateway"}],"tags":[{"name":"Journals"},{"name":"Articles"},{"name":"Meta"}],"components":{"securitySchemes":{"oanorKey":{"type":"apiKey","in":"header","name":"x-oanor-key","description":"Get your key at https://www.oanor.com/developer/keys"}}},"security":[{"oanorKey":[]}],"paths":{"/v1/journal":{"get":{"operationId":"get_v1_journal","tags":["Journals"],"summary":"A journal's full record","description":"","parameters":[{"name":"issn","in":"query","required":true,"description":"ISSN, e.g. 2167-8359","schema":{"type":"string"},"example":"2167-8359"}],"security":[{"oanorKey":[]}],"responses":{"200":{"description":"OK","content":{"application/json":{"example":{"data":{"journal":{"id":"576e4d34b8bf461bb586f1e90d80d7cc","apc":{"max":[{"price":1995,"currency":"USD"}],"url":"https://peerj.com/pricing/","has_apc":true},"url":"https://peerj.com/","issn":["2167-8359"],"title":"PeerJ","country":"US","created":"2013-05-09T18:14:08Z","license":[{"url":"https://creativecommons.org/licenses/by/4.0/","type":"CC BY"}],"keywords":["biomedical","health","genetics","ecology","biology"],"oa_start":2013,"subjects":[{"code":"R","term":"Medicine","scheme":"LCC"},{"code":"QH301-705.5","term":"Biology (General)","scheme":"LCC"}],"languages":["EN"],"publisher":"PeerJ Inc.","has_waiver":true,"peer_review":["Anonymous peer review"],"last_updated":"2026-01-15T10:39:34Z","preservation":["CLOCKSS","LOCKSS","PMC","Portico"],"aims_scope_url":"https://peerj.com/about/aims-and-scope/","deposit_policy":["Open Policy Finder"],"plagiarism_detection":true}},"meta":{"timestamp":"2026-06-01T08:13:20.079Z","request_id":"a3359a4a-ce70-4dfd-ae16-e19687fcbddd"},"status":"ok","message":"Journal retrieved","success":true}}}},"401":{"description":"Missing or invalid x-oanor-key header"},"402":{"description":"Active subscription required"},"429":{"description":"Rate-limit or monthly quota reached"},"502":{"description":"Upstream did not respond"}}}},"/v1/journals":{"get":{"operationId":"get_v1_journals","tags":["Journals"],"summary":"Search open-access journals","description":"","parameters":[{"name":"q","in":"query","required":true,"description":"Search text; Elasticsearch syntax allowed","schema":{"type":"string"},"example":"open science"},{"name":"page","in":"query","required":false,"description":"Page (1-based)","schema":{"type":"string"}},{"name":"limit","in":"query","required":false,"description":"Max results (1-100)","schema":{"type":"string"}}],"security":[{"oanorKey":[]}],"responses":{"200":{"description":"OK","content":{"application/json":{"example":{"data":{"page":1,"count":20,"query":"open science","total":3555,"journals":[{"id":"002b39d0fc5245978314b6fd9011448a","apc":true,"issn":["2752-6542"],"title":"PNAS Nexus","country":"GB","license":["CC BY","CC BY-NC"],"oa_start":2022,"subjects":["Science","Social Sciences"],"languages":["EN"],"publisher":"Oxford University Press"},{"id":"005ac383a4994582b305b1b8c96dacd2","apc":true,"issn":["1947-5721","1947-573X"],"title":"Advances in Oceanography and Limnology","country":"IT","license":["CC BY-NC"],"oa_start":2015,"subjects":["Ecology"],"languages":["EN"],"publisher":"PAGEPress Publications"},{"id":"00c4bb2ee62f4cf985980c7dca852c55","apc":true,"issn":["0924-9338","1778-3585"],"title":"European Psychiatry","country":"GB","license":["CC BY","CC BY-NC-SA","CC BY-NC-ND"],"oa_start":2020,"subjects":["Psychiatry"],"languages":["EN"],"publisher":"Cambridge University Press"},{"id":"00cf9ec0afd04cbaa36d5997c06f8edc","apc":false,"issn":["1860-5974"],"title":"Logical Methods in Computer Science","country":"DE","license":["CC BY"],"oa_start":2004,"subjects":["Logic","Electronic computers. Computer science"],"languages":["EN"],"publisher":"Logical Methods in Computer Science e.V."},{"id":"00d6163fb43b4d8688f414d9727bd1fd","apc":true,"issn":["2468-2276"],"title":"Scientific African","country":"NL","license":["CC BY","CC BY-NC-ND"],"oa_start":2018,"subjects":["Science"],"languages":["EN"],"publisher":"Elsevier"},{"id":"00f804eb7e21489ba9d2c6097f62db86","apc":true,"issn":["2673-611X"],"title":"Frontiers in Conservation Science","country":"CH","license":["CC BY"],"oa_start":2020,"subjects":["General. Including nature conservation, geographical distribution"],"languages":["EN"],"publisher":"Frontiers Media S.A."},{"id":"00fce6dc4ee4432797df1fcb8f24b6f4","apc":false,"issn":["1433-8351"],"title":"Living Reviews in Relativity","country":"DE","license":["CC BY"],"oa_start":1998,"subjects":["Atomic physics. Constitution and properties of matter"],"languages":["EN"],"publisher":"SpringerOpen"},{"id":"010f100d62a3421b91b364982574ccb0","apc":false,"issn":["1028-267X","2294-8813"],"title":"European Geologist","country":"BE","license":["CC BY"],"oa_start":2016,"subjects":["Geology"],"languages":["EN"],"publisher":"European Federation of Geologists"},{"id":"012147c22adc4cdebd1edc2c51518dc0","apc":true,"issn":["2162-0989"],"title":"Asia-Pacific Journal of Ophthalmology","country":"US","license":["CC BY","CC BY-NC-ND"],"oa_start":2019,"subjects":["Ophthalmology"],"languages":["EN"],"publisher":"Elsevier"},{"id":"012b976cc57e4ce1955628e280adde9d","apc":false,"issn":["2225-6032","2589-3025"],"title":"Tropical Cyclone Research and Review","country":"CN","license":["CC BY","CC BY-NC-ND"],"oa_start":2012,"subjects":["Physical geography","Environmental sciences"],"languages":["EN"],"publisher":"KeAi Communications Co., Ltd."},{"id":"013f7dd29fcc41d0916fd2070ef93730","apc":false,"issn":["1733-6716","2391-6737"],"title":"Politeja","country":"PL","license":["CC BY-NC-ND"],"oa_start":2013,"subjects":["Law","Political science"],"languages":["PL","EN"],"publisher":"Ksiegarnia Akademicka Publishing"},{"id":"014850470c6045b497d64abad23a9ccb","apc":true,"issn":["2110-5820"],"title":"Annals of Intensive Care","country":"NL","license":["CC BY","CC BY-NC-ND"],"oa_start":2011,"subjects":["Medical emergencies. Critical care. Intensive care. First aid"],"languages":["EN"],"publisher":"Elsevier"},{"id":"014cd2b336f3444aa76706843411cbf5","apc":true,"issn":["2666-8335"],"title":"Future Foods","country":"NL","license":["CC BY","CC BY-NC","CC BY-NC-ND"],"oa_start":2020,"subjects":["Nutrition. Foods and food supply","Food processing and manufacture"],"languages":["EN"],"publisher":"Elsevier"},{"id":"015b005edbd1442f8abe737f53cf4384","apc":true,"issn":["2352-9148"],"title":"Informatics in Medicine Unlocked","country":"GB","license":["CC BY","CC BY-NC","CC BY-NC-ND"],"oa_start":2015,"subjects":["Computer applications to medicine. Medical informatics"],"languages":["EN"],"publisher":"Elsevier"},{"id":"016662010df34602bf0a17178672fbb2","apc":true,"issn":["1949-8241","1949-825X"],"title":"Technology and Innovation","country":"GB","license":["CC BY","CC BY-NC"],"oa_start":2025,"subjects":["Technology"],"languages":["EN"],"publisher":"Taylor & Francis Group"},{"id":"016eb837f4f84a91af7c388a412204ff","apc":true,"issn":["2278-1897","2278-0203"],"title":"Journal of Orthodontic Science","country":"IN","license":["CC BY-NC-SA"],"oa_start":2011,"subjects":["Dentistry"],"languages":["EN"],"publisher":"Wolters Kluwer Medknow Publications"},{"id":"01769d63fa5f402095babf10c38a014e","apc":false,"issn":["2363-8761"],"title":"Journal of Numerical Cognition","country":"DE","license":["CC BY"],"oa_start":2015,"subjects":["Psychology","Mathematics"],"languages":["EN"],"publisher":"PsychOpen GOLD/ Leibniz Insitute for Psychology"},{"id":"019354493d2c403dad36de4a45f5a612","apc":true,"issn":["2949-8201"],"title":"ESMO Real World Data and Digital Oncology","country":"GB","license":["CC BY-NC-ND"],"oa_start":2023,"subjects":["Neoplasms. Tumors. Oncology. Including cancer and carcinogens"],"languages":["EN"],"publisher":"Elsevier"},{"id":"019371dc861b484582ae663d104602e9","apc":false,"issn":["0948-695X","0948-6968"],"title":"Journal of Universal Computer Science","country":"AT","license":["CC BY-ND"],"oa_start":2020,"subjects":["Electronic computers. Computer science"],"languages":["EN"],"publisher":"Graz University of Technology"},{"id":"0195f76628f143f48f3b74bc6672097b","apc":false,"issn":["0124-2253","2344-8350"],"title":"Revista Científica","country":"CO","license":["CC BY-NC-SA"],"oa_start":1999,"subjects":["Technology","Science"],"languages":["EN","ES"],"publisher":"Universidad Distrital Francisco José de Caldas"}]},"meta":{"timestamp":"2026-06-01T08:13:20.218Z","request_id":"6b8776ff-96ab-4ff0-b626-bd42939eb18b"},"status":"ok","message":"Journals retrieved","success":true}}}},"401":{"description":"Missing or invalid x-oanor-key header"},"402":{"description":"Active subscription required"},"429":{"description":"Rate-limit or monthly quota reached"},"502":{"description":"Upstream did not respond"}}}},"/v1/article":{"get":{"operationId":"get_v1_article","tags":["Articles"],"summary":"An article's full record","description":"","parameters":[{"name":"doi","in":"query","required":true,"description":"DOI, e.g. 10.7717/peerj.4375","schema":{"type":"string"},"example":"10.7717/peerj.4375"}],"security":[{"oanorKey":[]}],"responses":{"200":{"description":"OK","content":{"application/json":{"example":{"data":{"article":{"id":"13b0006802e745a6973c19b2ecb9b97a","doi":"10.7717/peerj.4375","year":"2018","month":"2","pages":"e4375","title":"The state of OA: a large-scale analysis of the prevalence and impact of Open Access articles","volume":"6","authors":[{"name":"Heather Piwowar","affiliation":"Impactstory, Sanford, NC, USA"},{"name":"Jason Priem","affiliation":"Impactstory, Sanford, NC, USA"},{"name":"Vincent Larivière","affiliation":"École de bibliothéconomie et des sciences de l’information, Université de Montréal, Montréal, QC, Canada"},{"name":"Juan Pablo Alperin","affiliation":"Canadian Institute for Studies in Publishing, Simon Fraser University, Vancouver, BC, Canada"},{"name":"Lisa Matthias","affiliation":"Scholarly Communications Lab, Simon Fraser University, Vancouver, Canada"},{"name":"Bree Norlander","affiliation":"Information School, University of Washington, Seattle, USA"},{"name":"Ashley Farley","affiliation":"Information School, University of Washington, Seattle, USA"},{"name":"Jevin West","affiliation":"Information School, University of Washington, Seattle, USA"},{"name":"Stefanie Haustein","affiliation":"Observatoire des Sciences et des Technologies (OST), Centre Interuniversitaire de Recherche sur la Science et la Technologie (CIRST), Université du Québec à Montréal, Montréal, QC, Canada"}],"country":"US","journal":"PeerJ","abstract":"Despite growing interest in Open Access (OA) to scholarly literature, there is an unmet need for large-scale, up-to-date, and reproducible studies assessing the prevalence and characteristics of OA. We address this need using oaDOI, an open online service that determines OA status for 67 million articles. We use three samples, each of 100,000 articles, to investigate OA in three populations: (1) all journal articles assigned a Crossref DOI, (2) recent journal articles indexed in Web of Science, and (3) articles viewed by users of Unpaywall, an open-source browser extension that lets users find OA articles using oaDOI. We estimate that at least 28% of the scholarly literature is OA (19M in total) and that this proportion is growing, driven particularly by growth in Gold and Hybrid. The most recent year analyzed (2015) also has the highest percentage of OA (45%). Because of this growth, and the fact that readers disproportionately access newer articles, we find that Unpaywall users encounter OA quite frequently: 47% of articles they view are OA. Notably, the most common mechanism for OA is not Gold, Green, or Hybrid OA, but rather an under-discussed category we dub Bronze: articles made free-to-read on the publisher website, without an explicit Open license. We also examine the citation impact of OA articles, corroborating the so-called open-access citation advantage: accounting for age and discipline, OA articles receive 18% more citations than average, an effect driven primarily by Green and Hybrid OA. We encourage further research using the free oaDOI service, as a way to inform OA policy and practice.","keywords":["Open access","Open science","Scientometrics","Publishing","Libraries","Scholarly communication"],"language":["EN"],"subjects":["Medicine","Biology (General)"],"publisher":"PeerJ Inc.","journal_issns":[],"fulltext_links":["https://peerj.com/articles/4375.pdf","https://peerj.com/articles/4375/"]}},"meta":{"timestamp":"2026-06-01T08:13:20.367Z","request_id":"1cea3e72-17b1-456b-b77c-a8e8807be826"},"status":"ok","message":"Article retrieved","success":true}}}},"401":{"description":"Missing or invalid x-oanor-key header"},"402":{"description":"Active subscription required"},"429":{"description":"Rate-limit or monthly quota reached"},"502":{"description":"Upstream did not respond"}}}},"/v1/articles":{"get":{"operationId":"get_v1_articles","tags":["Articles"],"summary":"Search open-access articles","description":"","parameters":[{"name":"q","in":"query","required":true,"description":"Search text","schema":{"type":"string"},"example":"quantum"},{"name":"page","in":"query","required":false,"description":"Page (1-based)","schema":{"type":"string"}},{"name":"limit","in":"query","required":false,"description":"Max results (1-100)","schema":{"type":"string"}}],"security":[{"oanorKey":[]}],"responses":{"200":{"description":"OK","content":{"application/json":{"example":{"data":{"page":1,"count":20,"query":"quantum","total":89049,"articles":[{"id":"000234f829464db48e0842cb118a7bc1","doi":"10.3390/fi16110412","year":"2024","month":"11","title":"Enhancing Communication Security in Drones Using QRNG in Frequency Hopping Spread Spectrum","authors":["J. de Curtò","I. de Zarzà","Juan-Carlos Cano","Carlos T. Calafate"],"journal":"Future Internet","fulltext":"https://www.mdpi.com/1999-5903/16/11/412","keywords":["frequency hopping spread spectrum (FHSS)","quantum random number generator (QRNG)","random processing units","quantum computing","drone communications","quantum enhanced communications"]},{"id":"00036f0f042d4e928431386e252406e0","doi":"10.1088/1367-2630/15/1/013009","year":"2013","title":"Non-equilibrium finite temperature dynamics of magnetic quantum systems: applications to spin-polarized scanning tunneling microscopy","authors":["K Them","T Stapelfeldt","E Y Vedmedenko","R Wiesendanger"],"journal":"New Journal of Physics","fulltext":"https://doi.org/10.1088/1367-2630/15/1/013009","keywords":[]},{"id":"0003d1347f1346269a95de8f6bf7a363","doi":"10.1016/j.softx.2023.101603","year":"2024","month":"02","title":"SOQCS: A Stochastic Optical Quantum Circuit Simulator","authors":["Javier Osca","Jiri Vala"],"journal":"SoftwareX","fulltext":"http://www.sciencedirect.com/science/article/pii/S2352711023002996","keywords":["Quantum optics","Quantum computation","Numerical method"]},{"id":"0004d79d93ef4080bebf2ec808b022a5","doi":"10.1016/j.jksuci.2023.101602","year":"2023","month":"07","title":"Lattice-based ring signcryption for consortium blockchain","authors":["Huifang Yu","Zhirui Lv"],"journal":"Journal of King Saud University: Computer and Information Sciences","fulltext":"http://www.sciencedirect.com/science/article/pii/S1319157823001568","keywords":["Consortium blockchain","Ring signcryption","Lattice","Privacy protection","Financial system"]},{"id":"000529dec0d14c49b201ff3fa7a8ba46","doi":"10.3847/2041-8213/acab5d","year":"2023","title":"Evidence for Enrichment of Niobium-92 in the Outer Protosolar Disk","authors":["Yuki Hibiya","Tsuyoshi Iizuka","Hatsuki Enomoto","Takehito Hayakawa"],"journal":"The Astrophysical Journal Letters","fulltext":"https://doi.org/10.3847/2041-8213/acab5d","keywords":["Nucleosynthesis","Solar system formation","Supernovae","Meteorites"]},{"id":"00058409cf8540f39b738362d61afbbf","doi":"10.5194/amt-7-4455-2014","year":"2014","month":"12","title":"Investigating uptake of N<sub>2</sub>O in agricultural soils using a high-precision dynamic chamber method","authors":["N. J. Cowan","D. Famulari","P. E. Levy","M. Anderson","D. S. Reay","U. M. Skiba"],"journal":"Atmospheric Measurement Techniques","fulltext":"http://www.atmos-meas-tech.net/7/4455/2014/amt-7-4455-2014.pdf","keywords":[]},{"id":"00069f6c219d417b938769f0377be3a2","doi":"10.1016/j.nme.2023.101447","year":"2023","month":"06","title":"A First-principles analysis of Structural, Electronic, Elastic, and vacant properties of BCC, FCC and HCP tungsten at different electronic temperatures","authors":["X.B. Ye","B.C. Pan"],"journal":"Nuclear Materials and Energy","fulltext":"http://www.sciencedirect.com/science/article/pii/S2352179123000868","keywords":["hcp-W","fcc-W","bcc-W","The first-principles calculations"]},{"id":"0006e5483de640e68c7be95edfa9367b","doi":"10.1088/1367-2630/ac7df6","year":"2022","title":"Inferring Markovian quantum master equations of few-body observables in interacting spin chains","authors":["Francesco Carnazza","Federico Carollo","Dominik Zietlow","Sabine Andergassen","Georg Martius","Igor Lesanovsky"],"journal":"New Journal of Physics","fulltext":"https://doi.org/10.1088/1367-2630/ac7df6","keywords":["Lindblad dynamics","machine learning","interacting spins","completely positive dynamics"]},{"id":"00074ecb3f11409e94d3e34e6bcf230f","doi":"10.29037/ajstd.185","year":"2017","month":"11","title":"SPIN-POLARIZED PHOTOCURRENT THROUGH QUANTUM DOT PHOTODETECTOR","authors":["Nguyen Van Hieu","Nguyen Bich Ha"],"journal":"ASEAN Journal on Science and Technology for Development","fulltext":"http://www.ajstd.org/index.php/ajstd/article/view/185","keywords":["Photocurrent","photodetector","quantum dot","spin-polarized"]},{"id":"00088fefc87549e4b19214d756b3f591","doi":"10.1007/JHEP08(2020)081","year":"2020","month":"8","title":"Quantum chaos, thermodynamics and black hole microstates in the mass deformed SYK model","authors":["Tomoki Nosaka","Tokiro Numasawa"],"journal":"Journal of High Energy Physics","fulltext":"http://link.springer.com/article/10.1007/JHEP08(2020)081","keywords":["AdS-CFT Correspondence","Black Holes in String Theory","Holography and condensed matter physics (AdS/CMT)","Random Systems"]},{"id":"000935b5d873428da38d9a67dca38c74","doi":"10.3390/axioms14060440","year":"2025","month":"06","title":"Complex Riemannian Spacetime: Removal of Black Hole Singularities and Black Hole Paradoxes","authors":["John W. Moffat"],"journal":"Axioms","fulltext":"https://www.mdpi.com/2075-1680/14/6/440","keywords":["complex variables","black holes","astrophysics"]},{"id":"000af58237494c7cb45232dafdf63b4b","doi":"10.1103/PhysRevPhysEducRes.16.020127","year":"2020","month":"10","title":"Effectiveness of guided group work in graduate level quantum mechanics","authors":["C. D. Porter","A. F. Heckler"],"journal":"Physical Review Physics Education Research","fulltext":"http://doi.org/10.1103/PhysRevPhysEducRes.16.020127","keywords":[]},{"id":"000bdabddcad4e9682a9dfb3009b0dde","doi":"10.1140/epjc/s10052-024-12616-w","year":"2024","month":"3","title":"Gravitationally induced unified relation among duality, coherence, steering, and maximal average fidelity","authors":["Duo-Duo Chen","Dong-Dong Dong","Xue-Ke Song","Liu Ye","Dong Wang"],"journal":"European Physical Journal C: Particles and Fields","fulltext":"https://doi.org/10.1140/epjc/s10052-024-12616-w","keywords":[]},{"id":"000be960993244319296fb04341b9c0e","doi":"10.1038/s42005-025-02475-6","year":"2026","month":"1","title":"Reinforcement learning with learned gadgets to tackle hard quantum problems on real hardware","authors":["Akash Kundu","Leopoldo Sarra"],"journal":"Communications Physics","fulltext":"https://doi.org/10.1038/s42005-025-02475-6","keywords":[]},{"id":"000c639470274366a49646294431720b","doi":"10.1038/s41598-025-08877-4","year":"2025","month":"7","title":"Investigating the performance of the fluorescent sensor g-C3N4/Fe/Cu in detecting the Tenofovir drug","authors":["Nafiseh Hajian Afarani","Fatemeh Keshavarzi","Kahin Shahanipour","Seyed Amir Zarei"],"journal":"Scientific Reports","fulltext":"https://doi.org/10.1038/s41598-025-08877-4","keywords":["Nano-probe","G-C3N4/Fe/Cu","Human serum","Tenofovir","Anti-Viral drug","Fluorescence detection"]},{"id":"000cbfc2915c4bb9b45a59614a23646c","doi":"10.3390/mi16060617","year":"2025","month":"05","title":"Highly Efficient Inverted Organic Light-Emitting Devices with Li-Doped MgZnO Nanoparticle Electron Injection Layer","authors":["Hwan-Jin Yoo","Go-Eun Kim","Chan-Jun Park","Su-Been Lee","Seo-Young Kim","Dae-Gyu Moon"],"journal":"Micromachines","fulltext":"https://www.mdpi.com/2072-666X/16/6/617","keywords":["OLED","inverted structure","Li-doped MgZnO nanoparticles","electron injection layer"]},{"id":"000ddf84c2344f1e85011c751ae455a4","doi":"10.1088/1367-2630/15/4/043033","year":"2013","title":"Global quantum correlations in finite-size spin chains","authors":["S Campbell","L Mazzola","G De Chiara","T J G Apollaro","F Plastina","Th Busch","M Paternostro"],"journal":"New Journal of Physics","fulltext":"https://doi.org/10.1088/1367-2630/15/4/043033","keywords":[]},{"id":"000e00908f3b4c30bac1a98f7cd2e366","doi":"10.1016/j.chphi.2025.100944","year":"2025","month":"12","title":"Photocatalytic degradation using Bi-doped SnS Quantum dots and phytotoxicity evaluation of treated effluents through seed germination","authors":["Govindhasamy Murugadoss","Nachimuthu Venkatesh","Pandurengan Sakthivel","Govindhan Thiruppathi","Palanisamy Sundararaj","Lalitha Gnanasekaran"],"journal":"Chemical Physics Impact","fulltext":"http://www.sciencedirect.com/science/article/pii/S2667022425001306","keywords":["Tin sulfide","Quantum dots","Visible light","Scavenger study","Seed germination","Toxicity analysis"]},{"id":"000ef1381d544930a6c799546b232b74","doi":"10.1186/1472-6750-11-121","year":"2011","month":"12","title":"Combining M-FISH and Quantum Dot technology for fast chromosomal assignment of transgenic insertions","authors":["Yusuf Mohammed","Bauer David LV","Lipinski Daniel M","MacLaren Robert E","Wade-Martins Richard","Mir Kalim U","Volpi Emanuela V"],"journal":"BMC Biotechnology","fulltext":"http://www.biomedcentral.com/1472-6750/11/121","keywords":[]},{"id":"0011f1cec4a345208ccf5b766e2173a7","doi":"10.3390/s16101720","year":"2016","month":"10","title":"Non-Enzymatic Glucose Sensing Using Carbon Quantum Dots Decorated with Copper Oxide Nanoparticles","authors":["Houcem Maaoui","Florina Teodoresu","Qian Wang","Guo-Hui Pan","Ahmed Addad","Radhouane Chtourou","Sabine Szunerits","Rabah Boukherroub"],"journal":"Sensors","fulltext":"http://www.mdpi.com/1424-8220/16/10/1720","keywords":["carbon quantum dots","copper oxide nanoparticles","glucose sensing","non-enzymatic","serum","electrochemistry"]}]},"meta":{"timestamp":"2026-06-01T08:13:20.577Z","request_id":"e69fe2d8-b44d-4572-bb38-11618e3685bc"},"status":"ok","message":"Articles retrieved","success":true}}}},"401":{"description":"Missing or invalid x-oanor-key header"},"402":{"description":"Active subscription required"},"429":{"description":"Rate-limit or monthly quota reached"},"502":{"description":"Upstream did not respond"}}}},"/v1/meta":{"get":{"operationId":"get_v1_meta","tags":["Meta"],"summary":"Usage notes","description":"","parameters":[],"security":[{"oanorKey":[]}],"responses":{"200":{"description":"OK","content":{"application/json":{"example":{"data":{"note":"The Directory of Open Access Journals — the authoritative community-curated index of vetted open-access scholarship (20,000+ journals, 10M+ articles). Search supports Elasticsearch query syntax (field:value, AND/OR, quotes, wildcards), e.g. q=bibjson.subject.term:Physics. /v1/journals?q=open science = search OA journals returning title, ISSNs, publisher, country, subjects, languages, whether article-processing charges (APC) apply, license and the year open access began; /v1/journal?issn=2167-8359 = a journal's full record (subjects with scheme, keywords, licenses, APC prices, fee-waiver policy, peer-review process, plagiarism detection, preservation & deposit policies, homepage); /v1/articles?q=quantum = search OA articles returning title, authors, journal, year, DOI, keywords and a free full-text link; /v1/article?doi=10.7717/peerj.4375 (or id=<DOAJ id>) = an article's full record with abstract, authors and affiliations, journal & ISSNs, pages, subjects and full-text links. Identify a journal by its ISSN and an article by its DOI or DOAJ id (from search). Data from DOAJ (CC BY-SA / CC0 metadata). For DOIs see the Crossref API, the scholarly graph the OpenAlex API, biomedical literature the Europe PMC API.","source":"DOAJ — Directory of Open Access Journals API (doaj.org)","endpoints":["/v1/journals","/v1/journal","/v1/articles","/v1/article","/v1/meta"]},"meta":{"timestamp":"2026-06-01T08:13:20.653Z","request_id":"eb674355-2e5e-4530-a52c-b09c5412c4b9"},"status":"ok","message":"Meta retrieved","success":true}}}},"401":{"description":"Missing or invalid x-oanor-key header"},"402":{"description":"Active subscription required"},"429":{"description":"Rate-limit or monthly quota reached"},"502":{"description":"Upstream did not respond"}}}}},"x-oanor-pricing":[{"slug":"free","name":"Free","price_cents_month":0,"monthly_call_quota":560,"rps_limit":2,"hard_limit":true},{"slug":"starter","name":"Starter","price_cents_month":700,"monthly_call_quota":20500,"rps_limit":6,"hard_limit":true},{"slug":"pro","name":"Pro","price_cents_month":2150,"monthly_call_quota":93000,"rps_limit":15,"hard_limit":true},{"slug":"mega","name":"Mega","price_cents_month":5900,"monthly_call_quota":385000,"rps_limit":40,"hard_limit":true}],"x-oanor-marketplace-url":"https://www.oanor.com/api/doaj-api"}