RESEARCH TRIANGLE PARK, N.C., Feb. 9 -- Nextreme Thermal Solutions, a developer of thermoelectric materials and devices, announced it has raised $8 million in Series A financing. A spinoff of nonprofit research organization RTI International, Nextreme will be led by former RTI entrepreneur Jesko von Windheim, a co-founder of Cronos Integrated Microsystems, a MEMS (microelectromechanical systems) company acquired by JDS Uniphase in 2000 for $750 million. 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