“…Antibodies (their size is about 12 nm) endowed with fluorescent dyes (e.g., Alexa Fluor 488 λEm=525 nm and Texas Red λEm=609 nm) [15][16][17] were used in the development of a wide range of effective targeted therapies [18][19][20][21][22] but they create clustering artifacts due to limited antibody penetration, which have an impact on insufficient labeling density. Thus, ligands that have been exploited for chemotherapeutic agent targeting systems can include monoclonal antibodies [23][24][25][26][27][28] but also low molecular weight receptor-binding conjugates such as dyelabeled peptides (arginine-glycine-aspartic acid-Cyt5,5) [29], peptide hormones [30,31], receptor antagonist and agonists [32], aptamers [33][34][35], transferrin [36][37], oligosaccharides [38], glycoconiugates [39], polyunsaturated fatty acids [40], oligopeptides [41,42], vitamin B12 [43], folic acid [44][45][46][47][48][49][50][51][52][53][54] and hyaluronic acid [55,56]. These ligands can be regarded as a tumor-specific receptor to construct a "guided molecular ...…”