The scanning electron microscopy (SEM) images are capable of revealing the morphology and microstructure of the SNPs/SWCNTs TIMs composites. Also shown at a higher magnification, the images of the TIMs were presented with scale bars of 20, 10, 3, and , respectively. Figure 4(a) clearly showed the existence of nano/microparticles in the size of 500 nm to with various configurations, viz, ellipses, circle, and irregular shapes, for the sample of SNPs 10% TIMs. For the case of SWCNTs embedded TIMs [Fig. 4(b)], the image showed relatively complex nanostructures with multiple SWCNTs bridging the adjacent matrix of thermal greases. The tubular structure of the SWCNTs can be vividly identified on the higher magnification with the distribution density experimentally found as . Figures 4(c)–4(d) showed the x-ray mapping of different elements (silver, zinc, silicon, oxygen, and carbon for SNPs TIMs and carbon, silicon, zinc, and oxygen for SWCNTs TIMs). X-ray mapping was primarily used to confirm the presence and dispersion of elements such as silver, carbon, oxygen, silicon, and zinc in the composite. According to the x-ray mapping results, the presence and dispersion of various elements of SNPs 10% TIMs sample can be quantitatively identified such as silver 60.13% (red), zinc 3.76% (blue), silicon 5.46% (green), carbon 2.76% (cyan), oxygen 5.06% (purple), and platinum-plated 22.99% [Fig. 4(c)]. Similarly for the SWCNTs TIMs sample, the elements of carbon 21.17% (cyan), silicon 16.1% (green), zinc 10.38% (blue), oxygen 13.07% (purple), and platinum-plated 36.05% [Fig. 4(d)] are identified. Previous study showed that the used thermal grease has the elements of oxygen, silicon, zinc, and minute quantity carbon,24 therefore, the SNPs/SWCNTs-embedded TIMs showed the additionally added elements of silver and carbon. Another result indicates that the SEM image of SNPs/SWCNTs composite and the SNPs/SWCNTs can be successfully screen printed on the TIMs substrate, a good indicator of our SNPs/SWCNTs filler preparation and spreading processes and that x-ray mapping furthermore confirmed the presence and dispersion of silver, carbon, silicon, zinc, and oxygen in the SNPs/SWCNTs composite such that the both in-plane/through-plane thermal conductivities can be effectively enhanced.