PALO ALTO, Calif., April 24 -- Nanosys Inc., a developer of nanotechnology-enabled systems, announced today the first closing of $30 million in a second round of financing. Investors ARCH Venture Partners, CW Group, Polaris Venture Partners, Venrock Associates, Prospect Venture Partners and Alexandria Real Estate Equities also participated in the last financing round; they are joined in this round by CDIB BioScience Ventures, Chiao Tung Bank, China Development Industrial Bank, Harris & Harris, Lux Capital, Quanta Computer and SAIC Venture Capital Corp. 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