The NIR absorption spectrum of pristine HIPCO tubes and HIPCO-modified tubes is presented. The spectrum shows the absorption characteristics in the near-infrared region for both types of tubes. Pristine HIPCO tubes refer to the original, unmodified tubes, while HIPCO-modified tubes have undergone some form of modification. The absorption spectrum provides information about the molecular structure and composition of the tubes. By comparing the spectra of the two types of tubes, one can identify changes in the molecular structure caused by the modification process. The NIR absorption spectrum is a useful tool for analyzing the chemical composition and structural properties of materials. It can help in determining the effectiveness of the modification process and its impact on the material's properties. The data from the spectrum can be used to study the behavior of the tubes in different environments and under various conditions. Overall, the NIR absorption spectrum of pristine and HIPCO-modified tubes offers valuable insights into the material's properties and the effects of modification.The NIR absorption spectrum of pristine HIPCO tubes and HIPCO-modified tubes is presented. The spectrum shows the absorption characteristics in the near-infrared region for both types of tubes. Pristine HIPCO tubes refer to the original, unmodified tubes, while HIPCO-modified tubes have undergone some form of modification. The absorption spectrum provides information about the molecular structure and composition of the tubes. By comparing the spectra of the two types of tubes, one can identify changes in the molecular structure caused by the modification process. The NIR absorption spectrum is a useful tool for analyzing the chemical composition and structural properties of materials. It can help in determining the effectiveness of the modification process and its impact on the material's properties. The data from the spectrum can be used to study the behavior of the tubes in different environments and under various conditions. Overall, the NIR absorption spectrum of pristine and HIPCO-modified tubes offers valuable insights into the material's properties and the effects of modification.