{"id":"https://openalex.org/A5111759119","orcid":"https://orcid.org/0009-0002-2224-8624","observed_orcids":["https://orcid.org/0009-0002-2224-8624"],"display_name":"Johan Marra","raw_author_names":["J Marra","J. Marra","Johan Marra"],"full_name":"Johan Marra","works_count":31,"cited_by_count":1908,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":19,"i10_index":23},"ids":{"openalex":"https://openalex.org/A5111759119","orcid":"https://orcid.org/0009-0002-2224-8624","observed_orcids":["https://orcid.org/0009-0002-2224-8624"]},"affiliations":[{"institution":{"id":"https://openalex.org/I118347636","ror":"https://ror.org/019wvm592","display_name":"Australian National University","country_code":"AU","type":"education","lineage":["https://openalex.org/I118347636"]},"years":[1986,1985]},{"institution":{"id":"https://openalex.org/I149704539","ror":"https://ror.org/02czsnj07","display_name":"Deakin University","country_code":"AU","type":"education","lineage":["https://openalex.org/I149704539"]},"years":[1988]},{"institution":{"id":"https://openalex.org/I4210122849","ror":"https://ror.org/02p2bgp27","display_name":"Philips (Netherlands)","country_code":"NL","type":"company","lineage":["https://openalex.org/I4210122849"]},"years":[2026,2016,2015,2011,2009,1993]},{"institution":{"id":"https://openalex.org/I4210159094","ror":"https://ror.org/04z9w5078","display_name":"Xerox (Canada)","country_code":"CA","type":"company","lineage":["https://openalex.org/I4210132870","https://openalex.org/I4210159094"]},"years":[1989,1988]}],"last_known_institutions":[{"id":"https://openalex.org/I4210122849","ror":"https://ror.org/02p2bgp27","display_name":"Philips (Netherlands)","country_code":"NL","type":"company","lineage":["https://openalex.org/I4210122849"]}],"topics":[{"id":"https://openalex.org/T12274","display_name":"Electrostatics and Colloid Interactions","count":14,"subfield":{"id":"https://openalex.org/subfields/1606","display_name":"Physical and Theoretical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10859","display_name":"Polymer Surface Interaction Studies","count":9,"subfield":{"id":"https://openalex.org/subfields/2508","display_name":"Surfaces, Coatings and Films"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10407","display_name":"Lipid Membrane Structure and Behavior","count":8,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10721","display_name":"Surfactants and Colloidal Systems","count":7,"subfield":{"id":"https://openalex.org/subfields/1606","display_name":"Physical and Theoretical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10923","display_name":"Force Microscopy Techniques and Applications","count":4,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T12274","display_name":"Electrostatics and Colloid Interactions","value":7.87e-05,"subfield":{"id":"https://openalex.org/subfields/1606","display_name":"Physical and Theoretical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10859","display_name":"Polymer Surface Interaction Studies","value":5.78e-05,"subfield":{"id":"https://openalex.org/subfields/2508","display_name":"Surfaces, Coatings and Films"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11264","display_name":"Coffee research and impacts","value":4.14e-05,"subfield":{"id":"https://openalex.org/subfields/2736","display_name":"Pharmacology (medical)"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T12452","display_name":"Electrowetting and Microfluidic Technologies","value":3.51e-05,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10407","display_name":"Lipid Membrane Structure and Behavior","value":3.08e-05,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"x_concepts":[{"id":"185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","score":0.8288254737854004},{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.6269000172615051},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.39559999108314514},{"id":"178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","score":0.3181431293487549},{"id":"127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","score":0.3177071809768677}],"counts_by_year":[{"year":1983,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1985,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1986,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":1988,"works_count":6,"oa_works_count":1,"cited_by_count":0},{"year":1989,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1991,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1993,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":34},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":51},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":49},{"year":2015,"works_count":1,"oa_works_count":0,"cited_by_count":51},{"year":2016,"works_count":4,"oa_works_count":2,"cited_by_count":55},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":66},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":55},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":68},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":47},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":58},{"year":2022,"works_count":1,"oa_works_count":0,"cited_by_count":43},{"year":2023,"works_count":1,"oa_works_count":0,"cited_by_count":57},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":23},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":36},{"year":2026,"works_count":2,"oa_works_count":2,"cited_by_count":20}],"display_name_alternatives":["J Marra","J. Marra","Johan Marra"],"block_key":"j marra","works_api_url":"https://api.openalex.org/works?filter=author.id:A5111759119","awards_count":0,"updated_date":"2026-11-07T12:08:38","created_date":"2016-06-24T00:00:00"}