PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 29808216-6 2018 Through analysing the difference between the cohesive energy and the clustering energy, we show the preference of Ni-Ni bond formation over Ni-surface interaction; this energy difference decreases with the increase of the Nin cluster size. ni-ni 114-119 ninein Homo sapiens 222-225