{"paper":{"title":"Effective forces in colloidal mixtures: from depletion attraction to accumulation repulsion","license":"","headline":"Effective forces between large colloids switch from attraction to repulsion as small-particle interactions change sign and strength.","cross_cats":["cond-mat.stat-mech"],"primary_cat":"cond-mat.soft","authors_text":"A.A. Louis, E. Allahyarov, H. Lowen, R.Roth","submitted_at":"2001-10-18T20:04:18Z","abstract_excerpt":"Computer simulations and theory are used to systematically investigate how the effective force between two big colloidal spheres in a sea of small spheres depends on the basic (big-small and small-small) interactions. The latter are modeled as hard-core pair potentials with a Yukawa tail which can be both repulsive or attractive. For a repulsive small-small interaction, the effective force follows the trends as predicted by a mapping onto an effective non-additive hard-core mixture: both a depletion attraction and an accumulation repulsion caused by small spheres adsorbing onto the big ones ca"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"For repulsive big-small interactions the effective force follows the non-additive hard-core mapping; when both big-small and small-small attractions are present, increasing small-small attraction strength makes the effective potential more repulsive.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The mapping onto an effective non-additive hard-core mixture remains quantitatively useful once a small-small attraction is added; the abstract states that the mapping trends are followed but does not quantify the error introduced by the attraction.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Effective colloid-colloid forces switch from depletion attraction to accumulation repulsion or repulsion-through-attraction depending on the signs and strengths of the underlying big-small and small-small Yukawa interactions.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Effective forces between large colloids switch from attraction to repulsion as small-particle interactions change sign and strength.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"70773888d9d6fa3e084d92a76a04c635e447a828df5d54b1ca5d27e22ff1f63f"},"source":{"id":"cond-mat/0110385","kind":"arxiv","version":2},"verdict":{"id":"a88faf9b-a7d8-4edc-a123-4e32eece075a","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T22:19:08.089770Z","strongest_claim":"For repulsive big-small interactions the effective force follows the non-additive hard-core mapping; when both big-small and small-small attractions are present, increasing small-small attraction strength makes the effective potential more repulsive.","one_line_summary":"Effective colloid-colloid forces switch from depletion attraction to accumulation repulsion or repulsion-through-attraction depending on the signs and strengths of the underlying big-small and small-small Yukawa interactions.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The mapping onto an effective non-additive hard-core mixture remains quantitatively useful once a small-small attraction is added; the abstract states that the mapping trends are followed but does not quantify the error introduced by the attraction.","pith_extraction_headline":"Effective forces between large colloids switch from attraction to repulsion as small-particle interactions change sign and strength."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/cond-mat/0110385/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"2c98ed39c8d43bbc0265f0b49f5aee45123ab708540ea43a636fb9c896d074c1"},"author_claims":{"count":1,"strong_count":1,"snapshot_sha256":"5e3b23b793a24ad44d50f012bed3c12f7c9e9c566d826ad85b79440943422c6c"},"builder_version":"pith-number-builder-2026-05-17-v1"}