Nanomaterials XRD vs. Bulk XRD

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  • เผยแพร่เมื่อ 25 ม.ค. 2025

ความคิดเห็น • 10

  • @swarnaaishu1562
    @swarnaaishu1562 ปีที่แล้ว +1

    Hi sir I done my project in nano particles (copper sulphate) and I gave my sample outsource for XRD and FTIR. They gave me a graph report of XRD didn't provided any text form data
    Now how can I calculate the crystalline size in origin
    How can I extract the data
    Pls help me

    • @qamarwali
      @qamarwali  ปีที่แล้ว

      For crystallite size calculation, please watch my videos in the *characterization techniques* playlist.
      You need to use Scherrer's equation to find the crystallite size.....
      There is also good discussion on the *community* tab in my channel
      Also, see the description of the video, where I have provided very good discussion

  • @amartyasau9968
    @amartyasau9968 6 หลายเดือนก่อน +1

    sir will you pls explain why the broadening in peaks happens for nano material

    • @qamarwali
      @qamarwali  6 หลายเดือนก่อน

      I have already explained in the video and I also kept the text in the description, BUT you don't read it 😒
      How the XRD peaks broaden as the size of the crystallite or grain or particles getting smaller?
      As the size of the material decreases from bulk (micro meter size) to nano (1-100 nm), the XRD peak starts broadening. This broadening is just like the amorphous materials. The x-rays realized the nanomaterials are just like the amorphous materials. In such a scenario, the XRD technique becomes difficult to analyze the nanomaterials of small size as the scattering of x-rays in many directions.
      The XRD technique becomes difficult to analyze the sample with crystallite size / particle size below than 5 nm as the peaks broad and low signal to noise ratio.
      Importance:
      This broadening of peaks has a significant importance in nanomaterials characterizations. For instance, if TEM shows the particle size ~ 10 nm BUT the XRD of the same sample shows SHARP peaks, then there is discrepancy.
      It means that the majority of the particles in the sample are not in the ~10 nm range, BUT rather large in size.

  • @mohamedriyas2115
    @mohamedriyas2115 ปีที่แล้ว +1

    Sir explain simply how to calculate crystalize size using debye scheers formula sir

    • @qamarwali
      @qamarwali  ปีที่แล้ว

      Noted with thanks 😊

  • @nftscryptotrading4451
    @nftscryptotrading4451 ปีที่แล้ว

    Sir want to contact with you, need a little help
    How can i contact with you

    • @qamarwali
      @qamarwali  ปีที่แล้ว +1

      Thanks for your comment. I will respond to the best of my capability here in the comment section.

  • @nftscryptotrading4451
    @nftscryptotrading4451 ปีที่แล้ว

    Sir your video is full of informative for us (researchers)...
    Please make one video on
    "Flourescence decay time curves" or decay time curves graph... I'm facing issue to understand the Photoluminescence decay time graph

    • @qamarwali
      @qamarwali  ปีที่แล้ว +1

      Okay, I will try to make it. Many thanks