EXHIBIT 3.1.1

                AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

                                  NANOSYS, INC.

         Nanosys, Inc., a corporation organized and existing under the laws of
the State of Delaware, hereby certifies as follows:

         A.       The original Certificate of Incorporation of the corporation
was filed with the Secretary of State of the State of Delaware on July 12, 2001.

         B.       Pursuant to Sections 242 and 245 of the General Corporation
Law of the State of Delaware (the "DGCL"), this Amended and Restated Certificate
of Incorporation restates and amends the provisions of the Amended and Restated
Certificate of Incorporation of the corporation.

         C.       This Amended and Restated Certificate of Incorporation has
been duly approved by the Board of Directors of the corporation in accordance
with Sections 242 and 245 of the DGCL.

         D.       This Amended and Restated Certificate of Incorporation has
been duly approved by the written consent of the stockholders of the corporation
in accordance with Sections 228, 242 and 245 of the DGCL.

         E.       The Certificate of Incorporation of the corporation is hereby
amended and restated in its entirety to read as follows:

                                    ARTICLE I

                  The name of the corporation is Nanosys, Inc.

                                   ARTICLE II

         The address of the corporation's registered office in the State of
Delaware is 30 Old Rudnick Lane, City of Dover, County of Kent 19901. The name
of its registered agent at such address is CorpAmerica, Inc.

                                   ARTICLE III

         The purpose of the corporation is to engage in any lawful act or
activity for which corporations may be organized under the DGCL.

                                   ARTICLE IV

         The corporation shall have authority to issue shares as follows:



         120,000,000 shares of Common Stock, par value $0.001 per share. Each
share of Common Stock shall entitle the holder thereof to one (1) vote on each
matter submitted to a vote at a meeting of stockholders.

         10,000,000 shares of Preferred Stock, par value $0.001 per share, which
may be issued from time to time in one or more series pursuant to a resolution
or resolutions providing for such issue duly adopted by the Board of Directors
(authority to do so being hereby expressly vested in the Board of Directors).
The Board of Directors is further authorized, subject to limitations prescribed
by law, to fix by resolution or resolutions the designations, powers,
preferences and rights, and the qualifications, limitations or restrictions
thereof, of any wholly unissued series of Preferred Stock, including without
limitation authority to fix by resolution or resolutions the dividend rights,
dividend rate, conversion rights, voting rights, rights and terms of redemption
(including sinking fund provisions), redemption price or prices, and liquidation
preferences of any such series, and the number of shares constituting any such
series and the designation thereof, or any of the foregoing.

         The Board of Directors is further authorized to increase (but not above
the total number of authorized shares of the class) or decrease (but not below
the number of shares of any such series then outstanding) the number of shares
of any series, the number of which was fixed by it, subsequent to the issuance
of shares of such series then outstanding, subject to the powers, preferences
and rights, and the qualifications, limitations and restrictions thereof stated
in the Certificate of Incorporation or the resolution of the Board of Directors
originally fixing the number of shares of such series. If the number of shares
of any series is so decreased, then the shares constituting such decrease shall
resume the status which they had prior to the adoption of the resolution
originally fixing the number of shares of such series.

                                    ARTICLE V

         The number of directors that constitutes the entire Board of Directors
of the corporation shall be determined in the manner set forth in the Bylaws of
the corporation. At each annual meeting of stockholders, directors of the
corporation shall be elected to hold office until the expiration of the term for
which they are elected and until their successors have been duly elected and
qualified; except that if any such election shall not be so held, such election
shall take place at a stockholders' meeting called and held in accordance with
the DGCL.

         The directors of the corporation shall be divided into three classes as
nearly equal in size as is practicable, hereby designated Class I, Class II and
Class III. The term of office of the initial Class I directors shall expire at
the first regularly-scheduled annual meeting of the stockholders following the
effective date of this corporation's initial public offering (the "EFFECTIVE
DATE"), the term of office of the initial Class II directors shall expire at the
second annual meeting of the stockholders following the Effective Date and the
term of office of the initial Class III directors shall expire at the third
annual meeting of the stockholders following the Effective Date. At each annual
meeting of stockholders, commencing with the first regularly-scheduled annual
meeting of stockholders following the Effective Date, each of the successors
elected to replace the directors of a Class whose term shall have expired at
such annual meeting shall be elected to hold office until the third annual
meeting next succeeding his or her election and until his or her respective
successor shall have been duly elected and qualified.

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         Notwithstanding the foregoing provisions of this Article, each director
shall serve until his or her successor is duly elected and qualified or until
his or her death, resignation, or removal. If the number of directors is
hereafter changed, any newly created directorships or decrease in directorships
shall be so apportioned among the classes as to make all classes as nearly equal
in number as is practicable, provided that no decrease in the number of
directors constituting the Board of Directors shall shorten the term of any
incumbent director.

         Any director may be removed from office by the stockholders of the
corporation only for cause. Vacancies occurring on the Board of Directors for
any reason and newly created directorships resulting from an increase in the
authorized number of directors may be filled only by vote of a majority of the
remaining members of the Board of Directors, although less than a quorum, at any
meeting of the Board of Directors. A person so elected by the Board of Directors
to fill a vacancy or newly created directorship shall hold office until the next
election of the Class for which such director shall have been chosen and until
his or her successor shall have been duly elected and qualified.

                                   ARTICLE VI

         In furtherance and not in limitation of the powers conferred by
statute, the Board of Directors of the corporation is expressly authorized to
adopt, amend or repeal the Bylaws of the corporation.

                                   ARTICLE VII

         The election of directors need not be by written ballot unless the
Bylaws of the corporation shall so provide.

                                  ARTICLE VIII

         No action shall be taken by the stockholders of the corporation except
at an annual or special meeting of the stockholders called in accordance with
the Bylaws, and no action shall be taken by the stockholders by written consent.
The affirmative vote of sixty-six and two-thirds percent (66 2/3%) of the then
outstanding voting securities of the corporation, voting together as a single
class, shall be required for the amendment, repeal or modification of the
provisions of Article V, Article VI or Article VIII of this Certificate of
Incorporation or Sections 2.1 (Place of Meetings), 2.2 (Annual Meeting), 2.3
(Special Meeting), 2.4 (Advance Notice Procedures; Notice of Stockholders'
Meetings), 2.9 (Voting), or 3.2 (Number of Directors) of the corporation's
Bylaws.

                                   ARTICLE IX

         The corporation shall indemnify and hold harmless, to the fullest
extent permitted by the DGCL as it presently exists or may hereafter be amended,
any director or officer of the corporation who was or is made or is threatened
to be made a party or is otherwise involved in any action, suit or proceeding,
whether civil, criminal, administrative or investigative (a "PROCEEDING") by
reason of the fact that he or she, or a person for whom he or she is the legal
representative, is or was a director, officer, employee or agent of the
corporation or is or was serving at the request of the corporation as a
director, officer, employee or agent of another corporation or of a partnership,
joint venture, trust,

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enterprise or non-profit entity, including service with respect to employee
benefit plans, against all liability and loss suffered and expenses reasonably
incurred by such person in connection with any such Proceeding. The corporation
shall be required to indemnify a person in connection with a Proceeding
initiated by such person only if the Proceeding was authorized by the Board.

         The corporation shall have the power to indemnify and hold harmless, to
the extent permitted by applicable law as it presently exists or may hereafter
be amended, any employee or agent of the corporation who was or is made or is
threatened to be made a party or is otherwise involved in any Proceeding by
reason of the fact that he or she, or a person for whom he or she is the legal
representative, is or was an employee or agent of the corporation or is or was
serving at the request of the corporation as a director, officer, employee or
agent of another corporation or of a partnership, joint venture, trust,
enterprise or non-profit entity, including service with respect to employee
benefit plans, against all liability and loss suffered and expenses reasonably
incurred by such person in connection with any such Proceeding.

         Neither any amendment nor repeal of this Article IX, nor the adoption
of any provision of this corporation's Certificate of Incorporation inconsistent
with this Article IX, shall eliminate or reduce the effect of this Article IX in
respect of any matter occurring, or any cause of action, suit or claim accruing
or arising or that, but for this Article IX, would accrue or arise, prior to
such amendment, repeal or adoption of an inconsistent provision.

                                    ARTICLE X

         Except as provided in Article IX above, the corporation reserves the
right to amend, alter, change or repeal any provision contained in this
Certificate of Incorporation, in the manner now or hereafter prescribed by
statute, and all rights conferred upon stockholders herein are granted subject
to this reservation.

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         IN WITNESS WHEREOF, Nanosys, Inc. has caused this Amended and Restated
Certificate of Incorporation to be signed by the President and Chief Executive
Officer of the corporation on this ____ day of _________ 2004.

                                                By:
                                                   -----------------------------
                                                   Calvin Y.H. Chow
                                                   Chief Executive Officer

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