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    Education:



    Research Interests:


  • Small-angle neutron scattering (SANS) from polymers and complex fluids.
  • Understanding clustering and solvation in water-soluble polymers and polyelectrolyes.
  • The helix-to-coil denaturation transition in DNA and other biology projects.

    The SANS Toolbox:


    Small-Angle Neutron Scattering (SANS) is an effective characterization tool for nanoscale structures. An extensive effort has been expanded to put together a 670 page textbook on the SANS technique and its application to the following areas of research: (1) Polymers, (2) Complex Fluids, (3) Biology and (4) Materials Science. This work is the culmination of over 20 years of SANS work mostly at the NIST Center for Neutron Research. Check out the entire pdf file.

    Distance Learning SANS Course:


    A Distance Learning Course covering most aspects of Small-Angle Neutron Scattering is available here.

    SANS Tutorials for Summer Schools:


    These are complete audio-visual SANS tutorials that includes introductory presentations as well as information about SANS data acquisition, data reduction and data analysis. It takes 4 hours to go over each one of these tutorials. SANS data sets have been included.
  • 1. Structural Phase Transitions of Pluronic P85 in D2O
  • . A Pluronic triblock copolymer in heavy water is rich in structural and phase transitions upon heating going all the way from polymer coil at low temperature to spherical micelles, then to cylindrical micelles and finally to lamellar morphology at the highest temperature.
  • 2. Nanostructure of SDS Micelles in D2O
  • . SDS forms micelles in D2O. The effects of temperature and SDS fraction are investigated. A set of material balance equations show that the amount of SDS remains dissolved in D2O at the CMC level even after micelles form.
  • 3. Effect of Ethanol co-Surfactant on SDS micelles
  • . Ethanol plays the role of co-surfactant on SDS micelles. It is found that ethanol accumulates inside the micelles!

  • Tutorial for the current summer school can be found here
  • .

    Physical Characterization Methods:


    This is a short tutorial covering the basics of many physical characterization methods. These include scattering methods (such as SANS, SAXS, DLS, and WAXS), spectrocopic methods (such as UV-Vis, and FTIR), microscopy (optical and electron based techniques) as well as other methods (calorimetry, chromatography, density measurements, etc). Check out the pdf file.


    List of all Publications:


    Publications for the 1981-1990 decade.

    Postdoctoral Associateship Opportunities:


    The National Research Council offers postdoctoral associateship opportunities in our facility at NIST. The successful candidate will be doing research in our area of focus and using our outstanding neutron scattering facilities. US citizenship is required. Selection is highly competitive. Application deadlines are February 1st and August 1st each year. More info can be found here. Check out this abstract. If interested, please contact me at the address below.

    Address:


    Boualem Hammouda
    National Institute of Standards and Technology
    Center for Neutron Research
    100 Bureau Drive, Stop 6102
    Gaithersburg, MD 20899-6102

    Email address: hammouda@nist.gov

Last modified 07-February-2017 by website owner: NCNR (attn: Boualem Hammouda)