▎ 摘　　要

NOVELTY - Composite comprises graphene oxide and polyethyleneimine. USE - Composite for gene delivery system for differentiation pluripotent stem cells and cell therapy for reproducing the cardiac cells, brain cells, nerve cells, fat cells, bone cells, cartilage cells, muscle cells, liver cells, pancreatic beta cells, vascular cells or lung cells (all claimed). ADVANTAGE - The composite enables to produce pluripotent stem cells efficiently for expression of exogenous protein for various cell strains. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite, which involves stirring and sonivating the materials.