  The experiment was conducted to synthesize carbon nanospheres of different
sizes by controlling the temperature in polycondensation reaction of glucose
under hydrothermal process. The surface morphology, structural, optical, and
thermal properties of as synthesized particles were characterized using TEM,
SEM, XRD, Raman spectroscopy, TGA, and DSC. The particles morphology and
dispersity were modified and reduced their size after calcination at $500^{o}
C$ in comparison to those without calcinated. Thermal study also indicates
particles change their phase from amorphous to crystalline and achieve thermal
stability after $520^{o}C$, which can also be verified by presence of D-band
and G-band in Raman spectrum. Overall results indicate that the carbon
nanospheres are hard solids and highly dispersed with size ranges from 50 nm to
300 nm.
