<SUBMISSION>
<ACCESSION-NUMBER>0001181431-03-026229
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20030428
<FILING-DATE>20031009
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>ROBERTS W IAN
<CIK>0001265095
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>000-22333
<FILM-NUMBER>03934413
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>1319 MARQUETTE DRIVE
<CITY>ROMBOVILLE
<STATE>IL
<ZIP>60446
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>NANOPHASE TECHNOLOGIES CORPORATION
<CIK>0000883107
<ASSIGNED-SIC>3390
<IRS-NUMBER>363687863
<STATE-OF-INCORPORATION>IL
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>453 COMMERCE ST
<CITY>BURR RIDGE
<STATE>IL
<ZIP>60521
<PHONE>6303231200
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>453 COMMERCE STREET
<CITY>BURR RIDGE
<STATE>IL
<ZIP>60521
</MAIL-ADDRESS>
</ISSUER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>rrd19644.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>3</documentType><periodOfReport>2003-04-28</periodOfReport>
    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000883107</issuerCik>
        <issuerName>NANOPHASE TECHNOLOGIES CORPORATION</issuerName>
        <issuerTradingSymbol>NANX</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001265095</rptOwnerCik>
            <rptOwnerName>ROBERTS W IAN</rptOwnerName>
        </reportingOwnerId>
<reportingOwnerAddress/>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1319 MARQUETTE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROMBOVILLE</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60446</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP U.S. &amp; International Sales</officerTitle></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeHolding><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>2.375</value></conversionOrExercisePrice><exerciseDate><value>2000-05-24</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2009-05-24</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>12000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>1.75</value></conversionOrExercisePrice><exerciseDate><value>2000-07-27</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2009-07-27</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>6667</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>7.6875</value></conversionOrExercisePrice><exerciseDate><value>2001-05-24</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2010-05-24</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>5200</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>10.875</value></conversionOrExercisePrice><exerciseDate><value>2002-01-26</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2011-01-26</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>12500</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>7.0625</value></conversionOrExercisePrice><exerciseDate><value>2002-02-28</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2011-02-28</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>12500</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>6.65</value></conversionOrExercisePrice><exerciseDate><value>2003-01-03</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2012-01-03</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>15000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>3.66</value></conversionOrExercisePrice><exerciseDate><value>2004-03-24</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2013-03-24</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>12000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes><footnote id="F1">Subject to certian restrictions, beginning on this date, options vest in five equal annual installments</footnote><footnote id="F2">Subject to certian restrictions, beginning on this date, options vest in three equal annual installments</footnote></footnotes><ownerSignature><signatureName>/s/ W. Ian Roberts</signatureName><signatureDate>2003-10-09</signatureDate></ownerSignature></ownershipDocument>



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</TEXT>
</DOCUMENT>
</SUBMISSION>
